Match Document Document Title
8885370 Current-fed isolation converter  
A current-fed isolation converter includes a coil that is connected to a primary side of a transformer, a power source that supplies electric power to the primary side of the transformer, a...
8884563 System and method for supplementing a generated DC power supply  
A renewable energy source is converted into a desired DC voltage that is delivered to a DC motor controller of a permanent magnet motor. A micro controller monitors the amount of supplied...
8884591 Control circuit for discontinuous conduction mode power factor correction converter using harmonic modulation  
A control circuit for a discontinuous conduction mode power factor correction converter using harmonic modulation includes: a first difference circuit configured to calculate and output a...
8885363 Dual-mode switching power control device  
A dual-mode switching power control device includes an electric transformer, a PWM driving controller, a switching transistor, an isolation element, an output diode and an output capacitor. The...
8885376 Switching regulator with integrated resonant circuit for ripple filtering  
A switching regulator IC contains both switching regulator circuitry and an inductor and a capacitor connected in parallel to form a resonant circuit having an associated notch filter frequency...
8885366 DC-to-DC voltage regulator and its operating method thereof  
A method for operating the DC-to-DC voltage regulator including plural active switches and plural inductors is disclosed. The method including the steps of: turning on the first active switch, and...
8885374 Multilevel converter and topology method thereof  
A multilevel converter includes at least one phase. Each phase of the multilevel converter includes a direct current (DC) link, a first circuit, a second circuit, and a phase capacitor. The DC...
8884577 Control apparatus for rotary electric machines  
In a control apparatus for a rotary electric machine receiving power from a DC power supply, a DC-AC converting circuit is provided with serially connected circuits each having high-potential-side...
8885371 Multi-level parallel power converters  
Multi-level power converters are disclosed. In one embodiment, a multi-level power converter includes an input for receiving an input voltage and a converter output for providing a variable output...
8885367 Input circuit for an electrical device, use of an input circuit and electrical device  
A switched-mode power supply unit includes a mains input connecting the power supply to a primary supply voltage; an input circuit including a shared electrical path connected to the mains input...
8885373 Earth leakage current control for a multi-level grounded inverter  
An energy conversion system and method perform active control of leakage current in multi-level grounded inverters. First and second subsystems each include positive and negative DC source...
8885369 Power regeneration device, method of regenerating power, power storage system, method of storing power, and high frequency device  
A power regeneration device includes an extraction unit and a high frequency-to-DC converter. The extraction unit is provided on a transmission path. The transmission path is provided for...
8885365 Switching power supply device and method for control thereof  
A switching power supply device and method for control thereof, including an input voltage generating unit, a transformer, an output voltage generating unit, a MOS transistor, an output voltage...
8885375 Inverter for preventing leak current  
An inverter including a switch circuit for converting a DC power to output an AC voltage between a first output terminal and a second output terminal is provided. The switch circuit includes a...
8884538 Light-emitting diode driving circuit  
A light-emitting diode (LED) driving circuit includes a power factor correction (PFC) circuit and a driving controller. The PFC circuit controls a power factor of the LED driving circuit. The LED...
8878476 Method for discharging charges remaining in capacitor in apparatus  
A PCU drives a motor generator using electric power from a power storage device. The PCU includes a power conversion device, a capacitor and a control unit. When detecting a crash, the control...
8878593 Switch control circuit and power supply device including the same  
The present invention relates to a switch control circuit that controls a switching operation of a power switch circuit that includes cascode-coupled first and second transistors. A switch control...
8879293 Cooling system of server with AC and DC power sources and method of operating the same  
A cooling system of a server with an AC power source and a DC power source includes an AC input subsystem, a DC input subsystem, and a driving control subsystem. The AC input subsystem receives an...
8879291 Multilevel voltage source converter  
A multilevel voltage source converter for high voltage DC power transmission and reactive power compensation. The voltage source converter includes at least one phase element including a plurality...
8879259 Cooling system for onboard electrical power converter, and electrical power converter for railway vehicle  
A cooling system for an onboard electrical power converter in which a heat dissipation surface extends parallel to a flow of cooling air draft includes: a coolant tank containing coolant that...
8879279 Systems and methods for constant current control in an LLC resonant power regulator  
One embodiment relates to an LLC resonant power converter system. The system includes a transformer comprising a primary inductor and a secondary inductor and a switch control stage configured to...
8879287 ***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Apparatus and methods for feedback sensing in multi-cell power supplies
 
Apparatus and methods in accordance with this invention provide a multi-cell power supply for receiving power from a source and delivering power at an output terminal to a load. The multi-cell...
8878456 Filter device  
A filter device (10) for filtering high-frequency interferences, such as due to switching flanks of a DC converter, has a current path (4) between an input (2) and an output (3), and an inductor...
8879284 Filter for switched mode power supply  
There is provided a filter for receiving a rectangular or stepped source voltage to be filtered and for providing an output voltage, the filter including means arranged to determine the output...
8879281 Switching power source device  
A switching power source device IS capable of guaranteeing a normal switching operation even when the input of a coil voltage used for adjusting a dead time is eliminated. The switching power...
8879282 Control methods for switching power supplies  
An embodiment provides a control method capable of controlling a switching-mode power supply to provide an output power source. The switching-mode power supply has a winding coupled to an input...
8879288 AC/DC converter device  
A command value is a current command value with a triangular-like waveform having a cycle that is ⅓ of a cycle of a three-phase voltage. A carrier has a triangular-like waveform having a cycle...
8879283 System and method providing protection in the event of current sensing failure for power converter  
System and method for protecting a power converter. The system includes a first comparator configured to receive a first threshold signal and a first signal and to generate a first comparison...
8879286 Facility power supply with power-factor correction  
An embodiment of a power supply includes an input node, a converter stage, and an outlet. The input node is operable to receive an input AC signal having peak portions and non-peak portions. The...
8878622 System and method for generating a pulse-width modulated signal  
In an embodiment, a method of generating a pulse-width modulated signal from an input signal includes calculating a finite number of basis functions of a first pulse-width modulated signal based...
8879285 Power converter for outputting power to a system  
A power converter includes a booster circuit, an inverter circuit, a hysteresis control circuit, and a proportional-integral control circuit. The booster circuit boosts DC power of a DC power...
8879290 Unified control of single and three-phase power converters  
Provided herein are unified control methods and implementations for controlling single and three-phase power converters. In an exemplary embodiment, a unified controller is provided that can be...
8878460 DC-DC converter protection circuit and protection method thereof  
A protection circuit of a DC-DC converter is disclosed. An input terminal of the DC-DC converter receives an input voltage and an output terminal of the DC-DC converter provides an output voltage....
8879943 Power supply system and image forming apparatus  
A power supply system for AC-DC conversion, includes: a first rectifying/smoothing circuit configured to rectify and smooth an AC voltage applied from an AC power supply; a switching power supply...
8879289 Systems and methods for flyback power converters with switching frequency and peak current adjustments based on changes in feedback signals  
System and method for regulating a power converter. The system includes a first comparator configured to receive a first input signal and a second input signal and generate a first comparison...
8878396 Continuous uninterruptable AC grounding system for power system protection  
A continuous grounding system for use in an alternating current system including a transformer is disclosed. The system includes a switch assembly connected between a transformer neutral of a...
8879292 Multipoint converters with brake chopper  
An electrical circuit for a power converter is described. The circuit has been provided with several semiconductor switches and capacitors used for operating the power converter. A brake...
8879280 Techniques to reduce audible noise in a power supply transformer  
This disclosure relates to a switching power supply with regulated voltage suppression to reduce transformer audio noise. A switched mode power supply (SMPS) may supply power at different levels...
8880229 Grid-interactive photovoltaic generation system with power quality control and energy saving  
Disclosed here is a grid-interactive photovoltaic generation system having power quality improvement and power saving functions. The grid-interactive photovoltaic generation system includes a...
8873263 Dual-input 18-pulse autotransformer rectifier unit for an aircraft AC-DC converter  
A dual-input 18-pulse autotransformer rectifier unit for more electric aircraft AC-DC converter uses an autotransformer with a nine-phase output to condition AC power prior to DC rectifying the AC...
8873262 Inverter driving system  
Provided is an efficient inverter driving method. A pulse with very short pulse width is supplied as a primary driving pulse of a transformer, and the secondary output voltage of the transformer...
8872434 Constant-current-drive LED module device  
A constant-current-drive LED module device includes a rectifier configured to receive and rectify an alternating current power source; a unidirectional LED module unit configured to connect to one...
8873257 Power supply apparatus with drive control signal inversion based upon resonance current level detection  
A control circuit performs at least one of detecting whether the resonance current detected by the current detection unit is beyond a first detection level over a predetermined time period, and...
8874395 Pre-charging filters to reduce settling time  
Various arrangements for determining a voltage of a voltage source using pre-charging are presented. Such arrangements may include a measurement module which includes an analog to digital...
8873258 Method for inhibiting a converter with distributed energy stores  
A method for inhibiting a converter having at least two phase modules is disclosed. Each phase module has an upper and a lower valve branch, with each upper and lower valve branch having a...
8873254 Isolated flyback converter with sleep mode for light load operation  
A flyback converter uses primary side sensing to sense the output voltage for regulation feedback. A comparator on the primary side detects whether the output voltage has exceeded a predetermined...
8872455 Method and controller for an electric motor with fault detection  
For each phase of a controller, semiconductor switches comprise a high side switch and a low side switch. A direct current voltage bus provides electrical energy to the semiconductor switches. A...
8873260 Method and an apparatus for controlling the output voltage of a boost converter  
The present invention concerns a method for controlling an output voltage of a boost converter composed of n bridge devices connected in series, each bridge device being composed of plural...
8873255 Power supply and startup circuit thereof  
A power supply and its startup circuit are provided. The startup circuit includes a first transistor, a bias resistor, a pull-down switch, a voltage detector, and a discharging path generator. A...
8873251 Output adjustment circuit for power supply unit  
An output adjustment circuit includes a rectifier and filter circuit, a voltage drop circuit, a voltage output circuit, a PWM regulator, and a feedback circuit. The rectifier and filter circuit...