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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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Method and apparatus for pulse width modulation
Tempo Semiconductor, Inc.
June 15, 2017 - N°20170170816

A ternary pulse width modulation (“pwm”) method and apparatus. In one embodiment, the start of the pulse sequence in the “current” frame is referenced to the end of the pulse sequence in a previous, “reference” frame, rather than to the frame boundary at the start of the current ...
Power factor correction conversion device and control method thereof
National Chung Shan Institute Of Science And Technology
June 15, 2017 - N°20170170745

A power factor correction conversion device and control method thereof are adapted to send an ac signal to a power factor correction conversion device, convert the ac signal into a dc signal, and perform power factor correction of the dc signal, so as to change a power factor sent to a back-end load, wherein the control method includes a rectification ...
Regenerative variable frequency drive with auxiliary power supply
Phase Technologies, Llc
June 15, 2017 - N°20170170743

A regenerative variable frequency drive includes an active converter connected to a dc bus that is connected to a first inverter that converts dc power to variable frequency, three phase ac power, and variable frequency, three phase ac power to dc power, and to a second inverter that converts dc power to three phase ac sine wave power. The converter ...
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Gate driver on array short-circuit protection circuit and liquid crystal panel including the same
Shenzhen China Star Optoelectronics Technology Co. Ltd.
June 15, 2017 - N°20170168359

The short-circuit protection circuit for a gate driver on array (goa) liquid crystal panel contains a power module, a first booster module, a feedback module, and a second booster module series-connected in the this order. A control module is electrically connected to the first booster, feedback, and second booster modules. The power module provides a power voltage. The control module ...
Position-sensorless control method and apparatus for brushless motor
International Green Chip (tianjin) Co., Ltd.
June 08, 2017 - N°20170163205

The present invention discloses a position-sensorless control method for a brushless motor, the method including: turning off a first driving voltage of a first phase coil, and within detection time, detecting a back electromotive force of the first phase coil; determining a reference phase and a cycle of a second driving voltage according to the back electromotive force; determining a ...
Pulse width modulation control of gas flow for plasma cutting and marking
Lincoln Global, Inc.
June 01, 2017 - N°20170156199

Gas flow control for a plasma arc torch is provided. More particularly, a method and apparatus to modulate the pressure and flow from a plasma arc torch is provided. Cyclic pulsing of a flow control valve between states of fully open and fully closed provides for a relatively constant flow of plasma gas to the torch at a relatively constant ...
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.
Device and control method for driving sensorless bldc motor
Industry-university Cooperation Foundation Hanyang University (iucf-hyu)
June 01, 2017 - N°20170155347

A device and control method for driving a sensorless brushless dc (bldc) motor, particularly related to a technology configured to increase the accuracy of detection of zero cross point through a non-commutation period in a pulse width modulation (pwm) control. The device for driving a sensorless bldc motor to switch a current applied to a stator winding based on a ...
Apparatus and method for controlling low voltage direct current converter for eco-friendly vehicle
Hyundai Motor Company
June 01, 2017 - N°20170151877

An apparatus for controlling a low voltage direct current (dc)-dc converter (ldc) for an eco-friendly vehicle includes a reference current receiver for receiving a reference current, a ramp signal generator for generating a ramp signal by overlapping an input current of the ldc, and a dc offset and a sawtooth wave for adjusting a gradient of the ramp signal, ...
Pulse width modulator and non-transitory computer readable medium for storing program for pulse width modulator
Hyundai Motor Company
May 25, 2017 - N°20170149417

The pulse width modulator includes a subtraction unit configured to perform subtraction between an m value digital signal and a pulse width modulation signal; a feedforward filter unit configured such that a ΔΣ modulator to which an output signal of the subtraction unit is input and which includes integrators of a second order or higher is in cascade ...
Method of operating an electric motor
Hyundai Motor Company
May 25, 2017 - N°20170149365

In a method of operating an electric motor, a pulse-width-modulated basic signal having a pulse width modulation frequency is generated for an electric variable of the electric motor. A control unit generates for the electric variable a sinusoidal additional signal at a sinusoidal frequency in an acoustically audible frequency range, and adds the basic signal and the additional signal to ...
Power supply apparatus with protection function and redundant power supply system
Hyundai Motor Company
May 25, 2017 - N°20170149271

A power supply apparatus with a protection function includes a pulse width modulation control unit, a pulse width modulation detecting unit, a switch unit and a feedback circuit. The feedback circuit detects a bus voltage. When the feedback circuit detects that the bus voltage is greater than a predetermined voltage, the feedback circuit sends an informing signal to the pulse ...
Power adapter with power saving mode and power-saving method for power adapter
Hyundai Motor Company
May 25, 2017 - N°20170149251

A power adapter with a power saving mode includes a power adaptation unit. The power adaptation unit includes a pulse width modulation control unit and a power saving signal receiver. The power saving signal receiver is electrically connected to the pulse width modulation control unit. When the power adapter enters a working status, the power adapter charges a battery. After ...
Liquid crystal display panel and liquid crystal display device
Hyundai Motor Company
May 25, 2017 - N°20170148400

A liquid crystal display panel and a liquid crystal display device are provided. The panel has a driving portion including a plurality of chips and a plurality of electronic components. The chips comprise a source driver chip, a pulse width modulation chip, a programmable gamma correction buffer chip, and a timing control chip. The electronic components are disposed on the ...
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.
Spray dryer
Hyundai Motor Company
May 25, 2017 - N°20170144120

An electrostatic spray drying system includes an electrostatic spray nozzle having a spray tip assembly arranged to discharge a supply of fluid into a drying chamber. The electrostatic spray nozzle is responsive to a duty cycle signal that determines periods at which the electrostatic spray nozzle is open to inject the fluid. A controller is programmed to activate a pulse ...
Light curing device
Libelle Technology Co., Ltd.
May 11, 2017 - N°20170135173

A light curing device includes a housing module and a lighting module. The lighting module includes at least one light-emitting diode (led), a driver, and a pulse width modulator. The led is disposed at the housing module, and is configured to be driven to emit curing light. The driver is operable in an activated state. When in the activated state, ...
Mixed analog-digital pulse-width modulator
Infineon Technologies Ag
May 11, 2017 - N°20170134194

A pulse width modulation system comprises an analog component and a digital component. The analog component operates to separate a local oscillator signal with different phase shifts and introduce an offset (i. E., a time delay) to analog signals being receive at an input with a tuning operation that fine tunes in the analog signals in the analog (continuous time) ...
Integrated analog delay line of a pulse-width modulator
Infineon Technologies Ag
May 11, 2017 - N°20170134015

A pulse width modulation (pwm) system comprises an analog component and a digital component. The analog component introduces an offset (i. E., a time delay) to analog signals being received at an input with a tuning operation that fine tunes in the analog signals in the analog (continuous time) domain. The analog component comprises an analog delay line comprising a ...
Pulse width modulation (pwm) for multi-level power inverters
Ge Energy Power Conversion Technology Ltd
May 11, 2017 - N°20170133946

Provided is a method for controlling operation of semiconductor gates in a power conversion system including one or more multilevel inverters coupleable to a modulator and a controller. The method includes generating, via the controller, a control signal responsive to an output current power factor associated with the inverters and producing a discontinuous pulse width modulation reference signal based upon ...
Lighting system color control
Hunter Industries, Inc.
May 04, 2017 - N°20170127493

Systems and methods are provided to control the color and brightness of led lighting. A control signal generator generates a hybrid control signal using pulse width modulation and analog control to drive an led driver with increased resolution to maintain color mixing while adjusting brightness of the led lighting.
Control apparatus for motor
Denso Corporation
May 04, 2017 - N°20170126162

A control apparatus operates an inverter by overmodulation pulse width modulation control or rectangular wave control to control an output torque of a motor to a command torque. When a first condition is not met, the inverter is operated by the overmodulation pulse width modulation control. The first condition is that an amplitude parameter increases and reaches a determination value. ...
Feedforward circuit for dc-to-dc converters with digital voltage control loop
Infineon Technologies Ag
May 04, 2017 - N°20170126119

Methods, devices, and systems are disclosed for receiving a first clock signal; receiving a digital duty cycle value; using the first clock signal and digital duty cycle value to generate a digital pulse width modulation (dpwm) signal having a plurality of discrete steps to control a switch of a switched-mode power supply; and using a voltage control circuit to modify ...
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