|| List of recent Motor Control-related patents
|Electric power steering system|
An electric power steering system includes a motor control device that controls, based on an assist command value, driving of a motor that gives an assist torque to a steering mechanism. The motor control device computes a first assist component based on a steering torque and a vehicle speed.
|Electric power steering system|
An electric power steering system includes a motor control device that controls driving of a motor based on an assist command value, the motor applying assist torque to a steering mechanism. The motor control device computes a first assist component based on steering torque and a vehicle speed.
|Electric motor and motor controller|
An electric motor controller having a front face and a rear face, the front face carrying a plurality of ac output couplings and the controller carrying a converter configured to convert a received dc supply into an output ac supply for controlling an electric motor, the ac output couplings being disposed symmetrically about an axis of symmetry of the controller on the front face of the controller. Also described is an apparatus comprising: a dc series motor; and a first current supply configured to supply a first current to an armature of the dc series motor; a second current supply configured to supply a second current to a field winding of the dc series motor; and a controller configured to control the first current supply to supply the first current based on a required torque output for the motor, and to control the second current supply to supply the second current based on the first current..
|Occlusion detection using pulse-width modulation and medical device incorporating same|
Apparatus are provided for motor control systems and related medical devices. In one embodiment, a control system includes a motor having a rotor, a modulation module coupled to the motor, and a control module coupled to the modulation module.
|Motor control device|
A motor control device according to an embodiment includes a first subtractor, a speed controller, and a phase compensating speed observer. The first subtractor subtracts a speed reference from a speed feedback signal to obtain a speed deviation.
|Dynamic pulse-width modulation motor control and medical device incorporating same|
Apparatus are provided for motor control systems and related medical devices. In one embodiment, a control system includes a motor having a rotor, a sensor to obtain a measured displacement that is influenced by rotation of the rotor, and a control module coupled to the sensor.
|Motor control device|
A motor control device includes an h-bridge circuit for controlling on/off of a current fed to a motor, a drive circuit for driving the h-bridge circuit, a drive command signal generator for generating a drive command signal including a pulse signal having a predetermined drive frequency for sending a command to drive the motor, a current detection circuit that includes a current detection resistor and a comparator connected in series with the motor and outputs a comparison output signal based on comparison between a current detection signal of a motor current and a target value signal, a latch circuit for holding a current detection result based on an on signal of the drive command signal and the comparison output signal, and a gate circuit for driving the drive circuit based on the on signal of the drive command signal and a latch output signal from the latch circuit.. .
|Motor driving device, and motor control method|
There is provided a motor driving device including: a speed detection unit detecting a speed of a motor; a comparison unit comparing the speed of the motor detected by the speed detection unit with an external input speed; and a speed control unit outputting the reference speed as a control signal when the speed of the motor is equal to a reference speed or less and outputting a motor control signal generated based on a comparative value of the comparison unit when the speed of the motor exceeds the reference speed.. .
|Brushless motor control device and brushless motor control method|
After a rotor of a three-phase brushless motor is previously moved by a simple control method to a predetermined rotary position, a motor is started-up. A brushless motor control device (10) moves a rotor (3) to a predetermined rotary position (stop position) before a three-phase brushless motor (1) is started-up.
|Electric motor and motor control|
Various embodiments of an electric motor and electronic control for an electric motor are disclosed. An exemplary electric motor comprises a single-phase brushless permanent magnet electric motor.
|Integrating a trench-gated thyristor with a trench-gated rectifier|
An integrated trench-mos-controlled-thyristor plus trench gated diode combination, in which the trenches are preferably formed at the same time. A backside polarity reversal process permits a backside p+ region in the thyristor areas, and only a backside n+ region in the diode areas (for an n-type device).
|Motor control device and electric power steering device using same|
Provided are a motor control device (1) for controlling a motor (2) having a plurality of phases, for quickly and accurately detecting a phase in which an open-state fault has occurred when the open-state fault occurs in a target phase. When a power-supply voltage (vb) is equal to or higher than a predetermined voltage (vthr), a motor rotation speed (ω) is equal to or lower than a predetermined speed (ωthr), a target x-phase voltage command (vx*) is not in the vicinity of zero, a current (ix) of the target x-phase is equal to or lower than a predetermined current (iu_thr), and a state in which a control error is equal to or larger than a predetermined error is detected over a predetermined time period or longer, occurrence of an open-state fault in the target phase is determined..
|Motor control device|
A motor control device includes a drive circuit to drive an h-bridge circuit to control a current fed to a motor, a drive command signal generator to generate a drive command signal including a pulse signal having predetermined drive frequency and duty for sending a command to drive the motor, a current detection circuit operable to output a comparison output signal based on comparison between a current detection signal of a motor current and a target value signal, a latch circuit to hold a current detection result based on an on signal of the drive command signal and the comparison output signal, a gate circuit to drive the drive circuit based on the on signal of the drive command signal and a latch output signal from the latch circuit, and a control unit that changes the duty of the drive command signal based on the current detection result.. .
|Heating circulating pump|
A heating circulating pump includes a pump housing (1) containing a pump impeller driven by an electric motor. The stator thereof is arranged in a motor housing (8) connected to the pump housing (1).
|Motor control device|
The present invention relates to a motor control device provided with the function of detecting the rotor position of a synchronous motor in a sensor-less fashion. The motor control device previously stores a current phase β defined by the two parameters that are an induced voltage peak value ep and the subtracted value (θe−θi) obtained by subtracting an induced voltage electrical angle θe from a current electrical angle θi, and based on the actual detected ep, θi, and θe, selects β by referring to the β previously stored, and calculates the rotor position θm by subtracting the selected β from the actual detected θi.
|Motor control apparatus and motor control method|
A motor control apparatus according to the embodiment includes a rotational position estimating unit, a change amount estimating unit, and an inductance estimating unit. The rotational position estimating unit estimates a rotational position of a rotor from a motor parameter including a q-axis inductance of a motor on a basis of an output current to the motor and a voltage reference.
|Motor control device|
Proposed is a motor control device that executes rotational control that follows load fluctuations in a startup mode. The proposed motor control device is provided with: detection means 4 that detects a current peak value ip and a current electrical angle θi based on phase currents iu to iw; detection means 5 that detects an induced voltage peak value ep and an induced voltage electrical angle θe based on phase currents iu to iw and applied voltages vu to vw; rotor position detection means 6 that detects a rotor position θm using θm=θi−β−90° or θm=θe−γ−90°; velocity fluctuation detection means 15 that detects a rotational velocity ω based on this θm; and startup means 10 that outputs a startup voltage instruction value vp and a startup voltage phase instruction value θv, increases the rotational velocity of the synchronous motor m with predetermined acceleration, and makes the rotational velocity ω detected by the velocity fluctuation detection means 15 be reflected in θv..
|Control device and stepping motor control method|
A motor control device includes a drive unit configured to rotate a rotor by supplying a drive signal with periodical changes to a coil; a detection unit configured to output a signal that is changed in association with a rotation of the rotor; and a control unit configured to control the drive signal supplied by the drive unit in accordance with the signal output from the detection unit, wherein the control unit performs a first control and a second control so as to achieve a target rotation velocity of the rotor, and wherein the first control is a control for controlling the rotation velocity of the rotor by controlling an advance angle of the drive signal with periodical changes and the second control is a control for controlling the rotation velocity of the rotor by controlling a voltage for supplying the drive signal.. .
|Motor control device, motor control method, and image forming apparatus|
A motor control device supplies a drive control signal to a drive circuit that drives a motor at a constant period using a motor drive signal based on the drive control signal, and shuts off the motor drive signal when a count value counted by a counter that reset the count value if a state of the motor changes exceeds a threshold corresponding to a plurality of driving periods of the motor. The motor control device includes: a control unit that controls a setting unit to set a rotational direction of the motor to a first rotational direction and a second rotational direction reverse to the first rotational direction at the constant period alternately, when a drive mode of the motor is a position holding mode to drive the motor so as to hold a rotational position of the motor..
|Variable width hospital bed|
A system for changing width of a person support apparatus is disclosed. A person support apparatus comprises at least one deck extension which is configured to be retracted or extended by at least one motor controlled by a bed controller.
|Automatic on-cnc tool for motion analysis and optimization|
The invention features, in one aspect, a computerized method for measuring or improving performance of a cutting head of an automated cutting system by evaluating motor control processing of an automated motion control of the cutting head of the automated cutting system. The method includes generating one or more motor outputs for the automated cutting system for any of a cut, a trace, or a motion, the one or more motor outputs corresponding to at least a portion of a set of motor output commands.
|Motor controller, image processing apparatus including the motor controller, and motor control method|
A motor controller, operatively connected to a motor having an output shaft, includes a rotary detector to detect a rotation direction and a rotation amount of the output shaft of the motor to generate an actual rotary signal, a drive controller to generate a control signal based on the actual rotary signal and a target rotary signal indicating a target rotary direction and a target rotary amount, and a driver to supply a driving power to the motor based on the control signal. When the motor is in a hold state, the control signal is reversed periodically for a predetermined reverse time period t2 per a predetermined one reverse cycle t1.
|Numerical controller with multicore processor|
A numerical controller includes a multicore processor, an integrated peripheral control lsi, a motor control section and an amplifier interface section. The multicore processor has two cores.
|Sensorless field-oriented control (foc) without current sampling for motors|
An apparatus includes a sensorless field-oriented control (foc) motor controller. The motor controller includes a pulse width modulation (pwm) controller configured to generate pwm signals and to provide the pwm signals to an inverter.
|Semiconductor device, electrical device and control signal, generation method|
The present invention provides a semiconductor device, an electrical device, and a control signal generation method that enable easy generation of a given control signal even by a comparatively low cost and low processing power microcontroller. Namely, a microcontroller of a motor control system includes a pwm device equipped with a pwm setting register.
|Motor voltage conversion control device|
A control device performs voltage conversion control on a voltage conversion circuit between a power supply and motor control circuits which control a plurality of motors. The control device includes sampling units for sampling a dc voltage after voltage conversion, target voltage setting units for setting target voltages vht1 and vht2 of the plurality of motors, selection unit for selecting a target voltage vht to be converted by the voltage conversion circuit from a plurality of target voltages vht1 and vht2, generating unit for generating a sampling timing ts on the basis of a gate signal gs1 or gs2 of one of the motors with the target voltage which has not been selected, and control unit for performing the voltage conversion control using the dc voltage sampled by the sampling units at the sampling timing ts in response to each sampling timing request ds in the voltage conversion control..
|Motor driving control apparatus|
A motor drive control apparatus for performing motor control that is stable and has a good efficiency includes: a speed processing unit that generates a first value by converting a second value corresponding to a current speed into a duty ratio; a torque processing unit that generates a third value by converting a fourth value corresponding to a target torque into the duty ratio; and a drive unit that controls switching by a switch included in a complementary switching amplifier by an average duty ratio corresponding to a sum of the first value and the third value to drive a motor connected to the complementary switching amplifier.. .
|Pmsm initial position detection system and method|
A system for determining an initial position of a rotor (9) of a pmsm motor includes a motor controller (2) coupled to a plurality of phase windings of the motor by means of an actuation circuit (3). A processor (12) and an interface circuit (14) are coupled to the processor and the phase windings.
|Brushless motor control device and brushless motor control method|
Regarding a brushless motor control device and a control method, the phase voltage vsu of any one phase of the three-phase brushless motor is detected by a sub-coil (su) (6). A time interval between adjacent zero-cross points a1 and a2 thereof is measured.
|Motor control apparatus and motor control method|
A motor control apparatus applying a sinusoidal drive waveform to a motor and including a position detection unit outputting a signal according to a motor shaft's position; and a control unit: acquiring a phase value of the motor's drive waveform when a signal is output by the position detection unit, changing a cycle of the drive waveform by measuring time from a previously output signal to a presently output signal, comparing the phases of the drive waveform and the motor shaft, and controlling to change to a cycle at which a phase value of the drive waveform matches a target phase value when a travel time corresponding to a phase value for adjustment has elapsed from a present time when a phase value of the drive waveform presently acquired differs from a target phase value acquired when the motor's drive current and drive voltage are in a designated phase relationship.. .
|Method and use of peripheral theta-burst stimulation (ptbs) for improving motor impairment|
The present invention provides new evidences to support that repetitive peripheral magnetic stimulation (theta-burst en stimulation, tbs) over nerve/muscle improves sensorimotor control. Chronic low back pain (clbp) is associated to a faulty volitional activation of transversus abdominis muscle (tra) and its delayed contraction during anticipatory postural adjustment (apa), in correlation with maladaptive reorganization of primary motor cortex (m1).
A motor controller, including: a control box (1), the control box (1) including a bottom, the bottom including a plurality of first bosses (11); a control panel (2); a plurality of igbt modules (3); and a heat dissipation boss (12), the heat dissipation boss (12) including an end surface. The control panel (2) is disposed and fixed on the first bosses (11) by screws.
|Motor exciting device and motor exciting method and motor control device and motor control method|
A motor control device which can determine a magnetic pole position for a magnetic pole position detector included in a permanent magnet motor in which the reluctance torque proportion is larger than the magnet torque proportion is provided. In a permanent magnet synchronous motor having multi-phase windings of n axes (n≧2), the windings of optionally selected k axes (k≦n) are dc excited using corresponding independent power supplies..
|Motor controlling circuit, motor driving device and method of driving motor|
There is provided a motor controlling circuit including: a hall signal level detecting unit detecting a hall signal from a hall sensor; and a signal generating unit sensing a change in a level of the hall signal to generate a motor controlling signal according to the change in the level of the hall signal, wherein the signal generating unit determines that the hall signal is maintained at a high level in a case in which a high level maintaining time of the hall signal is equal to or shorter than a preset time.. .
|Motor control device|
A motor control device includes an inverter driving an electric motor, a vector controller determining an output frequency and a command output voltage to drive the inverter, a speed controller determining a torque command value, a current command calculation unit and an inertia moment estimation unit obtaining a load torque estimate value and estimating inertia moment that is a combination of inertia moment of a motor rotor and inertia moment of a load apparatus, based on a deviation between an acceleration/deceleration torque output value obtained by subtraction of the load torque estimation from motor torque and an acceleration/deceleration torque estimate value obtained by multiplying a variation amount in the speed estimate value per unit time by an inertia moment estimate value. The speed controller is configured to be capable of adjusting a control parameter based on an inertia moment estimate value estimated by the inertia moment estimation unit..
|Motor control unit and brushless motor|
A motor control unit includes two circuit boards accommodated in a board housing, and a connection holder placed on an outer face of the board housing. The connection holder includes external connection terminals and connection pins.
|Countertop automatic foam soap dispenser|
A countertop automatic foam soap dispenser includes an automatic foam soap dispenser body, a soap liquid container, a circular connecting tube and a battery compartment. The soap liquid container is filled with an appropriate quantity of liquid soap.
|Small motor controller|
A small motor controller (smc) system includes a motor configured to control a position of a rotor, a sensor configured to detect position information of the rotor by detecting a feature on the rotor, the sensor including a detection zone having a first side and a second side, and a motor control unit. The motor control unit is configured to determine a position of the rotor corresponding to one of the first side of the detection zone and the second side of the detection zone based on whether the feature on the rotor is detected crossing the first side or the second side, respectively..
A motor controller according to the invention includes a driving ic and a magnetic sensor. The driving ic receives a driving signal for driving a motor and controls the rotation speed of the motor using the driving signal.
|Controller for a seatbelt positioning device and seatbelt positioning device|
A control (18) for a seat belt positioning device (10) includes a motor (12) for positioning a seat belt component (16). A locking tongue sensor (20) generates a locking tongue signal (s) depending on whether a locking tongue is inserted in a belt buckle (16).
|Electronically controlled valve assembly|
An electronically controlled valve assembly includes an electronically controlled linear actuator having a housing assembly and a rotor disposed within the housing assembly and controllably rotatable relative to the housing in response to a received motor control command. The rotor includes a drive shaft, and an annular bobbin circumferentially disposed about the drive shaft.
|Electronic power steering apparatus|
An electronic power steering apparatus for a vehicle having a steering mechanism to generate a steering assisting force includes: a steering angle sensor; a steering torque sensor; a target steering torque setting unit for setting a target steering torque based on the detected steering angle; a torque deviation computing unit for computing a torque deviation between the target steering torque and the detected steering torque; a first target current value computing unit for computing a first target current value for generating a steering assisting force by the motor based on the computed torque deviation; and a vehicle speed sensitivity adjusting unit that adjusts the first target current value, at least corresponding to a detected vehicle speed, and outputs the adjusted first current value as a second target current value. The motor control unit controls the motor to generate the steering assisting force based on the second target current value..
|Motor control apparatus|
A motor control apparatus includes a motor that rotates a controlled object, an encoder that outputs a pulse signal in synchronization with a rotation of the motor, and a control section that performs a feedback control so as to rotate the motor to the target rotational position. The control section includes a stopping and holding control portion.
|Power-assisted supercharger and method for controlling same|
The power-assisted supercharger (10) includes: a turbocharger (12) in which a turbine (12a) is rotationally driven by exhaust gas (7) from an engine (40), a compressor (12b) rotationally driven by the turbine compresses intake air (5) and supplies the intake air to the engine; an electric motor (14) connected to a rotary shaft (12c) connecting the turbine and the compressor, the electric motor to add rotational force to the turbocharger; and a motor controller (20) to control a drive current (i) to the electric motor required for an assist operation for the turbocharger, by open loop, based on an accelerator opening degree (a) of the engine and a rotational speed (ne) of the engine. In this power-assisted supercharger, a turbo lag can be reduced by itself, power consumption can be small even in a range in which the rotational speed is high, malfunctions or unnecessary power consumption can be prevented, a control system can be simplified, and the installation space and the weight thereof can be small..
|System and method for information processing and motor control|
The present invention relates to a system and method for information process and motor control using artificially constructed apparatus. More specially, the present invention provides a system and method that can process nature language and other informational input including visual, audio and other sensory inputs and respond intelligently..
|Vibration-type motor controller and optical apparatus|
A vibration-type motor controller controls a driving speed of a vibration-type motor relatively moving a vibrating body in which a vibration is excited by an electromechanical energy conversion element 20 to which a first frequency signal and a second frequency signal having a phase difference are applied, and a contacting body which contacts the vibrating body. The vibration-type motor controller includes a speed controller 1 configured to alternately switch a frequency control which changes frequencies of the first and second frequency signals while fixing the phase difference and a phase difference control which changes the phase difference while fixing the frequency so that at least one of a plurality of frequency controls or a plurality of phase difference controls are included to increase and decrease the driving speed of the vibration-type motor..
|Magnetic polarity determination device, permanent magnet synchronous motor control device, and magnetic polarity determination method|
A control system for controlling a synchronous motor having a magnet in a rotor includes an inverter configured to output an ac current for driving the motor, a gate command generating unit configured to generate a gate command for controlling the inverter, a current detecting unit configured to detect the ac current output by the inverter, a magnetic pole position estimating unit configured to estimate a magnetic pole position based on the ac current detected by the current detecting unit and generate an estimation signal, a current command generating unit configured to generate a current command and an estimation command for controlling the inverter to output an ac current with a predetermined level, and a magnetic polarity determination unit configured to determine the polarity of the magnet based on the estimation signal.. .
An electric drive is disclosed, in particular for a power tool, including a rotor, a stator, and a first coil arrangement, which is designed to drive the rotor by a first rotating field, and including a first motor control arrangement, which is designed to supply the first coil arrangement with electric current in order to generate a first rotating field. The stator has a second coil arrangement for generating a second rotating field.
|Actuator with electric motor and motor controller|
An actuator (1m, 1s) with a motor (12) and a motor controller (11) is configurable to operate as a master or a slave to another actuator which is coupled mechanically for driving a common load. For the case where the actuator (1m) is set as the master, the motor controller (11) receives on an input terminal (y3) an external position control signal (pc), generates a motor control signal (sc) for controlling the motor (12) based on the position control signal (pc), and supplies the motor control signal (sc) to an output terminal (u5) for controlling a slave.
|Fiber optic connector fiber stub remover and method|
A fiber optic connector fiber stub remover and method for automated fiber stub removal. The device has a top plate with a platen opening, and a platen with a well that carries a polishing film over the well.
|Display device having a stepper motor and a watchdog timer|
A display device, having a microcontroller, a graphics controller, and a pointer driven by a stepper motor. The graphics controller does not have an arithmetic logic unit and can be controlled by the microcontroller and by command sequences of a command sequencer contained in the graphics controller.
|Method and system for powering and measuring positions of a plurality of dc-motors over a wire interface|
A system comprising a motor controller for providing a plurality of first power signals and a single common second power signal to a motor module comprising a plurality of potentiometers connectable to a plurality of dc-motors. The power signals and feedback signals are sent over a wire interface having less than three wires per motor.
A motor controller that controls energization of a motor in which a plurality of coils u1 to w2 that applies torque to a rotor is arranged in a circular pattern includes: a rotation speed detection sensor that detects a rotation speed of the motor; and an energization control unit that controls energization of the plurality of coils u1 to w2 using the detected rotation speed. The energization control unit sequentially energizes the plurality of coils u1 to w2 in all energization patterns if the detected rotation speed is outside of predetermined conditions and sequentially energizes the plurality of coils u1 to w2 in remaining energization patterns (for example, u→v phase, v→w phase, v→u phase, w→u phase, and w→v phase) excluding a partial energization pattern (for example, u→w phase) of all energization patterns if the detected rotation speed is within the predetermined conditions..
|Control circuit with frequency hopping for permanent magnet motor control|
A control circuit of a motor is provided. The control circuit includes a pulse width modulation circuit, a microcontroller, a timer and an analog-to-digital converter.
|Ripple extraction device, motor control apparatus, vehicle seat and ripple extraction method|
A ripple extraction device extracts ripple components contained in a current signal of a motor. The ripple extraction device is provided with a current-voltage converter that converts a current signal of the motor into a voltage signal; a filter that filters the voltage signal converted by the current-voltage converter, and attenuates the ripple components; and a differential amplifier that obtains the difference between the voltage signal converted by the current-voltage converter and an output signal of the filter..
|Efficient manual to automatic valve conversion device|
A powered valve actuator assembly converts a manually operated valve without removal of the valve handle for automated valve operation in response to detection of a preselected condition. The design incorporates a motor, motor control circuit, drive shaft, valve handle engaging member and anti-rotation member.
|Emergency steering system and controlling method of the same|
Provided are an emergency steering system and a method of controlling the emergency steering system. The emergency steering system includes a plurality of wheel units each including an in-wheel motor and a steering unit; a motor controller configured to control an electric current applied to at least one of the in-wheel motors; and an emergency steering signal input unit configured to receive an emergency steering signal, which is a signal for applying the electric current to the at least one of the in-wheel motors, transmit the received emergency steering signal to the motor controller, and control the motor controller based on the emergency steering signal, wherein the motor controller configured to control the electric current applied to the at least one of the in-wheel motors based on the emergency steering signal..
|Pump motor control assembly|
A pump motor assembly operable to provide driving power to a fluid pump includes a rotor, a stator, a case housing the rotor and the stator, and a control assembly mounted to the case and operable to control motor operation. The control assembly includes an information display and a cover overlying the display, with a window section in general alignment with the display.
|Non-contact sheet conductivity measurements implementing a rotating magnetic braking system|
A non-contact sheet conductivity measurement system includes a magnetic head apparatus, a computing system coupled to the magnetic head apparatus, a linear actuator coupled to the magnetic head apparatus, a motor controller coupled to the magnetic head apparatus, a power supply coupled to the magnetic head apparatus and a frequency meter coupled to the magnetic head apparatus. .
|Multi-shaft motor drive device and multi-axis motor drive system|
A multi-shaft motor drive device comprises at least one amplifier module, a control substrate, and a power substrate. The at least one amplifier module is configured to supply power to at least one motor.
|Motor control device that decreases power consumed by control power source when power fails|
A pwm signal generation unit generates a pwm signal to drive a motor, based on a current value of the motor sampled by a current value sampling unit, a position or speed of the motor sampled by a motor sampling unit, and a position or speed of a driven object sampled by a driven object sampling unit. An operation stop unit stops the operation of any one of the motor sampling unit and the driven object sampling unit depending on the power stored in the dc link part and power to which the control power source can supply when the alternating-current power source fails..
|System and method for isolating the undriven voltage of a permanent magnet brushless motor for detection of rotor position|
The system and method disclose for the controlling of sequential phase switching in driving a set of stator windings of a multi-phase sensorless brushless permanent magnet dc motor. A motor controller controls a power stage that drives two windings of a set of three windings in the motor with pulse width modulated signal.
|System and method for permanent magnet motor control|
A method of operating an electric motor is disclosed. The method includes: starting the electric motor in an open loop control mode; operating an estimator that estimates operating conditions of the electric motor; and, while the electric motor is in the open loop control mode, evaluating a first parameter of the estimator.
|Motor control device that decreases power consumed by control power source when power fails|
A motor control device has a current value sampling unit configured to sample a current value of a motor, a pwm signal generation unit configured to generate a pwm signal to drive the motor, based on the sampled current value of the motor, and a power supply stop unit configured to stop supply of power from a control power supply to a peripheral depending on power stored in a dc link part and power to which the control power source can supply when an alternating-current power source fails.. .
An electric vehicle includes a motor unit configured to drive a wheel, an ecu and an inverter unit. A motor control circuitry of the inverter unit includes a rotational frequency controller operable to perform rotational frequency control.
|Motor control apparatus and electric power steering apparatus using the same|
A motor control apparatus includes an a/d converter, which is a hardware part for converting an analog signal of a sensor to a digital signal, a microcomputer, which is a software part, and a drive circuit, which is a hardware part for driving an inverter to supply electric power to a motor. The microcomputer includes calculation blocks, each of which is a calculation block for individually calculating an output from an input.
|Electric automobile, in-wheel motor drive device, and motor control method|
An electric vehicle is proposed which can achieve early detection of abnormal short-circuit of motor coils, thus avoiding various driving problems. The electric vehicle includes a motor unit configured to drive a wheel.
|Motor control device, method for operating the same, and image processing apparatus|
A motor control device includes: a unit configured to generate a target rotation position information of a first driving motor based on target rotation position signals indicating a target rotation position of a second driving motor being replaced with the first driving motor; a unit configured to generate a speed predicting of the first driving motor; a unit configured to detect a rotation position of the first driving motor; a unit configured to generate an actual position information of the first driving motor; a unit configured to generate an actual speed of the first driving motor; a unit configured to correct an error between the target rotation position and the actual rotation position of the first driving motor; a unit configured to generate a speed error signal; a unit configured to generate a speed control signals of the first driving motor; and a unit configured to output a drive voltage.. .
|Portable battery charger|
A portable device for charging and discharging batteries simultaneously via having a servomotor controlled automatically by a microcontroller unit using software is described. The servomotor arm is controlled and a circuit is open or closed at the command of the software based upon the voltage of each one of the batteries connected to the device; the temperature of the electrical wires and the amperage of the battery o batteries being charged.
|System and method for traction motor control|
A control method includes monitoring changes in torque produced by a traction motor when an excitation frequency of current supplied to the traction motor changes, determining if the torque produced by the traction motor decreases when the excitation frequency of the current supplied to the traction motor increases, and responsive to the torque produced by the traction motor decreasing when the excitation frequency increases, preventing the excitation frequency of the current supplied to the traction motor from increasing further.. .
|Motor control device|
It is an object of the present invention to provide a motor control device that can improve stability of sensorless control of a permanent magnetic synchronous motor. Rotor position detecting means (10) includes motor parameter correcting means (30) for correcting a parameter (winding resistance of a coil, a magnetic flux amount of a permanent magnet), which is a machine constant of a motor, in order to eliminate an induced voltage difference between a detected induced voltage peak value and a detected estimated induced voltage peak value and detects the rotor position on the basis of the corrected parameter..
|Electric power steering apparatus|
When a current sensor fails, instead of a normal-time motor control section, an abnormal-time motor control section drives and controls a motor. The abnormal-time motor control section detects a timing at which motor current becomes zero in a state in which all the switching devices are turned off.
Phase voltage setting means defines an actual current phase region including a current phase error range based on parameters including an individual difference of at least any one of a motor and an inverter, defines a stable operation current phase region in which a rotor position can be detected through sensorless control, and sets, as a target current, an electric current obtained by adding a predetermined phase difference corresponding to the number of revolutions detected by revolution number detecting means to an electric current set by current vector control such that the actual current phase region is within the stable operation current phase region.. .
|Blower system and method for controlling the same|
A blower system, including a permanent magnet motor and a wind wheel. The permanent magnet motor includes a stator assembly, a rotor assembly, and a motor controller.