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Power-off brake circuit for DC fan
The present invention relates to a power-off brake circuit for a DC fan, which comprises a control unit, a motor driver unit, a switch unit, a power-off...
Brake diagnosis device and brake diagnosis method
This disclosure discloses a brake diagnosis device configured to diagnose a brake of a motor with a brake. The brake diagnosis device includes a brake control...
Clamp with burls-electrode
Holding apparatus (100) for electrostatically holding component (1), (e.g., a silicon wafer), includes base body (10) composed of first and second plates...
Ultrasonic motor and lens apparatus including the same
Provided is an ultrasonic motor, comprising: a vibrator including a piezoelectric element and a contact surface to be brought into contact with a member to be...
Combined power transmission and heating systems and method of operating
A combined direct current DC power transmission and heating system is provided. The system includes a rectifier station configured to generate a DC link...
Pulse-width modulation control of paralleled inverters
A system includes a paralleled inverter circuit and a controller. The paralleled inverter circuit includes a first inverter and a second inverter. The...
Method and device for actuating an inverter
The invention relates to a method for actuating an inverter (10) by means of space vector pulse width modulation, in particular for actuating an electrical...
Multilevel inverters and their components
A multilevel inverter includes a first half bridge in series with a second half bridge, each comprising a switch having a channel. The switch is configured to...
DC-bus controller for grid-connected DC/AC converters
Systems, methods, and devices for controlling a DC-bus voltage for a power conditioning system. A control system regulates the DC value of the DC-bus voltage....
Power conversion system
A power conversion system includes a filter unit, a DC/DC converter, a DC link, an inverter, a control unit, and a traction motor. The DC/DC converter is used...
High-frequency power supply apparatus for supplying high-frequency power
A high-frequency power supply apparatus for supplying high-frequency power to a load the impedance of which greatly fluctuates is provided, wherein a stable...
A power converter includes at least one leg having a first string operatively coupled to a second string via a first connecting node and a second connecting...
Method and apparatus for power module output power regulation
A method and apparatus for modifying power produced by a power converter. In one embodiment, the method comprises comparing a line voltage level to a first...
Power supply system and image forming apparatus having the same
A power supply system includes: a switching power supply configured to rectify and smooth an AC voltage of an AC power supply to generate a predetermined DC...
Power conversion apparatus and control chip thereof
A power conversion apparatus is provided. The power conversion apparatus receives an AC input power by an input side and includes a capacitor, an AC-to-DC...
Power supply control circuit and power source cut-off detection method
A power supply control circuit arranged to prevent a steady power loss from occurring in an input filter connected to an alternating current power source. In...
System and method for operating power converters
An electrical circuit for a power converter includes a first switching device proximate an AC source. The circuit also includes a voltage measurement device...
Power generating device, control device, controlling method and power
A power generating device is provided, which includes a matrix converter device, a power transmission path for transmitting electric power between the matrix...
Power conversion apparatus that switches electrode connection when a
short-circuit is detected
A full-bridge circuit has serial first arms and serial second arms. Another full-bridge circuit has serial third arms and serial fourth arms. Primary and...
System for driving a piezoelectric load and method of making same
A driver system comprises a direct current (DC) voltage source and a first bi-directional DC-to-DC converter having a primary side coupled to the DC voltage...
Direct current voltage conversion device and clamping circuit
A direct current voltage conversion device includes a direct current to alternating current converter, a transformer, a first converter switch, a second...
Flyback active clamping power converter
A flyback active clamping power converter is disclosed. The flyback active clamping power converter comprises an input inductor, a down-bridge switch, an...
System and method for series connecting electronic power devices
A system and method for series connecting electronic power devices are disclosed. In one embodiment, a switching device system includes a first upper arm...
Method of feedback commanding a monophase resonant converter, a related
monophase resonant converter and a...
A resonant converter includes a primary switching circuit having a primary winding and a primary switching stage configured to drive the primary winding; a...
Power conversion with controlled phase difference and duty ratio
A power conversion method of a power conversion apparatus including plural primary side ports disposed in a primary side circuit and a secondary side port...
Power supply with standby operation
A power supply includes a power conversion circuit configured to selectively operate in one of an active mode in which output power is supplied to a load and a...
Flyback controller featuring bidirectional power control and
parallelly-connected power modules
A flyback controller featuring bidirectional power control and parallelly-connected power modules is based on flyback DC-DC converters for allowing...
Power converter with power foldback
A controller for use in a power converter includes a drive circuit coupled to control switching of a power switch of the power converter to regulate the output...
AC-DC power supply input voltage detection and monitoring
A power converter includes a transformer with a primary and a secondary winding and a switch. A controller of the power converter at the primary winding side of...
Control circuit for a switched-mode power supply
A control circuit for a switched-mode power supply having an input side (101) connectable to an electrical power source and an output side (102) connectable to...
Electric power converter
An electric power converter is equipped with a master converter and a slave converter that are connected in parallel with each other, and to a load. The master...
Push-pull converter and modulation method for controlling a push-pull
A push-pull converter including a primary-side input converter circuit with a plurality of primary-side switching devices in a full-bridge circuit including a...
Switching converter with dead time between switching of switches
A device and method for operating a switching power converter are disclosed. In an embodiment a circuit includes a switching power converter having a half...
Direct current control with low E-M emission
A switching control circuit includes driving a flow of direct current through an at least partially inductive load. The switching control circuit is adapted for...
Voltage generating circuit and regulator circuit for precisely control
predetermined high voltage
A high voltage generating circuit includes a charge pump circuit and an output voltage control circuit. The charge pump circuit raises a voltage to a high...
A converter having an inductor, a first switch, a second switch, a third switch, and a fourth switch connected between the other ends of the inductor and the...
Power switch control by adjusting the base current of a bipolar transistor
The present document relates to Direct Current (DC) to DC power converters. In particular, the present document relates to DC to DC power converters which...
Switched mode power supply peak-efficiency detection
A peak efficiency detection system may include a switched power supply (SPS) module providing an output supply signal. The SPS module may have an internal node,...
Switch protection i auxiliary resonant circuit
A resonant power converter comprising electrical safety components comprising a combination of a diodes and a zener diodes coupled between DC conductors and an...
Determination of phase offsets in a power supply system having multiple
A controller (500) for determining a distribution of switching phases among switching elements of a power supply system The power supply system has a plurality...
Circuits and methods for dynamic voltage management
In one embodiment the present invention includes a circuit comprising a voltage adjust circuit and an input terminal of an electronic system. The voltage adjust...
Voltage regulation of a DC/DC converter
Power system includes at least one power source and a DC/DC converter with an input coupled to the power source, and an output coupled to a load, for allowing...
Control circuit, control method, DC-DC converter and electronic device
A control circuit (115), a control method, a DC-DC converter and an electronic device are provided. The control circuit (115) is used to control the DC-DC...
Inverter device, transformer, and transformer manufacturing method
Provided is an inverter device that can reduce high-frequency noise. The inverter device includes a transformer for converting the voltage of the AC power...
Hybrid distribution transformer with an integrated voltage source
A hybrid distribution transformer is provided that includes an electromagnetic transformer and a voltage source converter that is operable to reduce fluctuation...
Reference signal generating circuit and method using a sampled input
signal and a reference clock signal, and...
A reference signal generating circuit is provided that generates a reference signal corresponding to an input signal for power factor compensation of a power...
Driver controller with internally calculated average output current
Methods, devices, and integrated circuits are disclosed for a driver controller that internally calculates average output current. In one example, a method...
Induction current sampling device and method for bridgeless PFC circuit
Disclosed are an induction current sampling device and method for a bridgeless PFC circuit. The device includes a first sampling unit, a second sampling circuit...
Power supply noise reduction circuit and power supply noise reduction
To provide a power supply noise reduction circuit and a power supply noise reduction method that do not require circuit elements to be increased in size and do...
Switching regulator with controllable dead time and quick start
A driver circuit for driving a switching transistor includes a dead time calibration circuit and/or a quick start circuit. The dead time calibration circuit...