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Pulse Width Modulation

Pulse Width Modulation-related patent applications - as published by the U.S. Patent and Trademark Office (USPTO).


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Motor and fan having motor
Johnson Electric S.a.
December 07, 2017 - N°20170353132

A fan and a motor thereof are provided. The motor includes a motor drive device. The motor drive device includes a printed circuit board. A control management unit and a voltage converter are arranged on the printed circuit board, the control management unit classifies target rotation speed signals provided by an ecu into multiple rotation speed intervals, with each rotation ...
Pulse width modulation controller and relevant control method having minimum on time in response to ...
Leadtrend Technology Corporation
December 07, 2017 - N°20170353122

A pwm controller in a switching mode power supply provides to a power switch a pwm signal determining an on time and an off time. A peak detector detects a voltage peak of a line voltage generated by rectifying an alternating-current input voltage. An off-time control unit controls the pwm signal and determines the off time in response to a ...
Dc-dc converter input voltage high-energy transient clamping topology
Sensata Technologies, Inc.
December 07, 2017 - N°20170353104

In electrical systems with dc-dc converters having synchronous rectification (sr) on the output stage, the input voltage can be monitored. When a potentially destructive transient occurs, the sr is rapidly turned on in a non-synchronous manner to “crowbar” the main power transformer. The resulting short circuit is reflected back to the dc input under current-limited pulse ...
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Fan and motor drive device thereof
Johnson Electric S.a.
December 07, 2017 - N°20170350305

A fan and a motor drive device thereof are provided. The motor drive device is configured to drive a motor and includes a control management unit and a voltage converter. The control management unit classifies target rotation speed signals provided by an ecu into multiple rotation speed ranges, each corresponding to a specific output duty ratio. The control management unit ...
Power control apparatus for sub-module of mmc converter
Hyosung Corporation
November 30, 2017 - N°20170346407

The present invention relates to a power control apparatus for sub-modules in a modular multilevel converter (mmc), which controls the supply of power to sub-modules in an mmc connected to an hvdc system and to a statcom. The power control apparatus includes a half-bridge circuit unit for switching multiple switches, converting an input voltage across p and n buses of ...
Inductor current emulation for output current monitoring
Fairchild Semiconductor Corporation
November 30, 2017 - N°20170346385

A switch mode power supply controller includes a switch terminal adapted to be coupled to an inductor that drives a load, high- and low-side switches a pulse width modulation (pwm) circuit, and a current monitor circuit. The pwm circuit is coupled to a feedback terminal for receiving a feedback signal, and alternatively drives the high-side switch and the low-side switch ...
Pulse Width Modulation Patent Pack
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Pulse Width Modulation Patent Applications
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inventor
  • 123+ full patent PDF documents of Pulse Width Modulation-related inventions.
  • Exact USPTO filing data with full-text, images, drawings & claims.
  • Index pages: Table View and Image-Grid View layouts. All images in each PDF.
Igbt/fet-based energy savings device for reducing a predetermined amount of voltage using pulse width ...
The Powerwise Group, Inc.
November 23, 2017 - N°20170338740

An igbt/fet-based energy savings device, system and method wherein a predetermined amount of voltage below a nominal line voltage and/or below a nominal appliance voltage is saved, thereby conserving energy. Phase input connections are provided for inputting analog signals into the device and system. A magnetic flux concentrator senses the incoming analog signal and a volts zero crossing ...
Multi-load control apparatus and slave circuit and control method thereof
Richtek Technology Corporation
November 23, 2017 - N°20170338663

The present invention provides a multi-load control apparatus, a slave circuit and a control method thereof. The multi-load control apparatus includes a master circuit and at least one slave circuit. The master circuit generates at least one pulse width modulation (pwm) signal according to an input signal. The slave circuit controls a power switch according to a corresponding pwm signal. ...
Display driver, display and terminal
Wuhan China Star Optoelectronics Technology Co., Ltd.
November 23, 2017 - N°20170337883

The disclosure provides a display driver, applied to process image data sent by a processor, the driver includes a time sequence controller, a data receiver connected with the time sequence controller electrically, an image processing module, a data storage module, a pulse width modulation register and a source electrode driver; when the display processor sends static image data, the static ...
Fault protection for electric drive systems
Ford Global Technologies, Llc
November 23, 2017 - N°20170334294

A vehicle power system includes a controller configured to issue commands to open a selected set of switches of an inverter and then to operate the selected set of switches according to a pulse width modulation signal having an increasing duty cycle such that input current to a battery is driven towards zero and a magnitude of d-axis current of ...
Current limited power converter circuits and methods
Altera Corporation
November 16, 2017 - N°20170331363

A power converter circuit regulates an output voltage of a power train circuit and controls the current in the power train circuit. A current sensor circuit measures a current in the power train circuit. A hysteretic comparison circuit compares the current in the power train circuit to positive and negative current limits. The hysteretic comparison circuit causes a positive current ...
Radiation hardened dc-dc converter for operation at cryogenic temperatures
Altera Corporation
November 16, 2017 - N°20170331277

A radiation-hardened dc-dc converter capable of operating at cryogenic temperatures in high radiation environments. The radiation-hardened dc-dc converter can include an input side, the input side producing a high frequency ac voltage; a transformer; and an output side, the output side including a magnetic amplifier, wherein the pre-regulated high frequency ac voltage is fed to the magnetic amplifier through the ...
Multi-pixel distributed pulse width modulation control
X-celeprint Limited
November 16, 2017 - N°20170330509

A distributed pulse-width modulation system includes an array of pulse-width modulation elements, each element including a digital memory for storing a plurality of multi-bit digital values, a drive circuit for each stored multi-bit digital value, and an output device for each stored multi-bit digital value. The multi-bit digital values all have the same number of bits. For each stored multi-bit ...
Pulse Width Modulation Patent Pack
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Pulse Width Modulation Patent Applications
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For professional research & prior art discovery
inventor
  • 123+ full patent PDF documents of Pulse Width Modulation-related inventions.
  • Exact USPTO filing data with full-text, images, drawings & claims.
  • Index pages: Table View and Image-Grid View layouts. All images in each PDF.
Light emitting device with dimming visible light communication function and interaction device applying for visible ...
Generalplus Technology Inc.
October 12, 2017 - N°20170295627

A light emitting device with a dimming visible light communication function and an interaction device applying for visible light are provided. The light emitting device with the dimming visible light communication function comprises a luminance adjusting unit, a control circuit and a light emitting device. The luminance adjusting unit outputs a luminance adjusting signal according to luminance adjusted by a ...
Power supply circuit
Semiconductor Energy Laboratory Co., Ltd.
October 05, 2017 - N°20170288541

A power supply circuit includes: an analog/digital converter for converting an analog signal to a digital signal; a pulse width modulation signal control circuit for generating a setting control signal varying in accordance with the difference between a reference voltage and a feedback voltage and a control signal for controlling a pulse width modulation signal, which is based on ...
Power detection and transmission circuit coupling analog input signal on primary side to secondary side ...
Fsp Technology Inc.
October 05, 2017 - N°20170288530

A power detection and transmission circuit is provided. The power detection and transmission circuit includes a first conversion circuit, a second conversion circuit and a signal coupling circuit. The first conversion circuit is electrically connected to a power supply module to receive an analog input signal, and is arranged for converting the analog input signal to a first pulse width ...
Method of controlling electric current of linear solenoid valve
Honda Motor Co., Ltd.
October 05, 2017 - N°20170284485

A method of controlling the electric current of a linear solenoid valve by performing pulse width modulation on a coil current for energizing a linear solenoid of the linear solenoid valve to adjust the hydraulic pressure of a working oil in a hydraulic clutch for transmitting and interrupting the rotational drive power from a power source to a drive wheel ...
Btl output self-oscillating class d amplifier
Yamaha Corporation
September 28, 2017 - N°20170279422

A bridge-tied load output self-oscillating class d amplifier includes a comparator receives an input signal from a signal input circuit at a second input terminal and outputs a positive-phase pulse width modulation signal and a reverse-phase pulse width modulation signal by comparing voltages of the two input terminal, first and second switching circuits power-amplifies the reverse-phase pulse width modulation signal ...
Self-oscillating class d amplifier
Yamaha Corporation
September 28, 2017 - N°20170279421

A self-oscillating class d amplifier includes an integration circuit configured to integrate an input signal and output a result of the integration as an integrated signal, a comparator configured to receive the integrated signal at an inverting input terminal and output a pulse width modulation signal by comparing voltages of a non-inverting input terminal being grounded and the inverting input ...
Semiconductor device, motor control device, lens unit for imaging apparatus, and imaging apparatus
Renesas Electronics Corporation
September 28, 2017 - N°20170277169

A motor control, device that controls a motor, includes: a plurality of processors, each being adapted to generate information for generating a pulse width modulation (pwm) signal; a plurality of pwm signal generation circuits, each being provided corresponding to each of the processors and adapted to generate the pwm signal on the basis of the information that has been generated ...
Apparatus for controlling light emitting diode module having light intensity compensation function and lighting system ...
Uver Corporation Ltd.
September 21, 2017 - N°20170273155

An apparatus for controlling a light emitting diode (led) module having a light intensity compensation function includes a light intensity sensor measuring intensity of light irradiated by the led module depending on a current value, based on a predetermined light intensity signal; a compensation signal generating unit generating a compensated light intensity signal to compensate for an error between measured ...
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