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9036387 Alternating-current/direct-current converter  
An alternating-current/direct-current converter includes a rectifier, a reactor, a capacitor, and a switching rectifier. The rectifier is configured to rectify alternating-current voltage output...
9024477 High voltage power source device and image forming device  
A high voltage power source device includes piezoelectric transformers, each of the piezoelectric transformers being formed with a primary electrode and a secondary electrode on piezoelectric...
9019735 Power factor correction circuit and method for controlling power factor correction  
A power factor correction circuit may include a boost converter circuit in which a plurality of boost circuits including a boost inductor, a rectifying diode, and a boost switch are connected with...
9013905 Three-phase 48-pulse rectifier transformer  
A three-phase 48-pulse rectifier transformer includes two 24-pulse rectifier transformers phase-shifted through valve-side output windings. Each 24-pulse rectifier transformer has two sets of...
9007793 Synchronous rectifier driver circuit rectifier  
A synchronous rectifier includes a primary rectifier circuit and a secondary rectifier circuit. The primary rectifier circuit is configured to produce first and second half-rectified signals from...
8988910 Alternating-current conversion system having low power consumption bleeder circuit  
A low power consumption bleeder circuit is disclosed, and it is coupled to an alternating-current (AC) power source, an input filtering capacitor, and a rectifying filter. The low power...
8988911 Self-bias emitter circuit  
Self-bias emitter circuit configurations can use the amplitude of an input AC carrier signal to provide a DC bias voltage across an emitter for suitable operation. A self-bias emitter circuit can...
8982594 Circuit for controlling a switch in series with a capacitive element  
A circuit for controlling a switch in series with a capacitive element. A circuit may include a bidirectional switch and a diode in parallel with first and second conduction terminals of the...
8982595 T-connected autotransformer-based 40-pulse AC-DC converter for power quality improvement  
Design of a T-connected autotransformer based 20-pulse ac-dc converter is presented in this invention. The 20-pulse topology is obtained via two paralleled ten-pulse ac-dc converters each of them...
8964433 Insulator integrated power supply  
A power scavenging device attaches to an overhead power cable and a support pole. The power scavenging device includes a non-conducting outer body and a first capacitor and a second capacitor that...
8958223 Compact high-power diode/thyristor rectifier architecture  
A Graƫtz-bridge converter-rectifier in which at least one rectifier arm situated between a single AC terminal and a single DC terminal includes multiple unidirectional electronic components...
8942018 Single-phase self-driven full-bridge synchronous rectification  
A full-bridge rectifier is configured to provide synchronous rectification with either a current-source or a voltage-source. The rectifier has an upper branch and a lower branch and two current...
8937796 Variable frequency drive and methods for filter capacitor fault detection  
Variable frequency motor drives and control techniques are presented in which filter capacitor faults are detected by measuring filter neutral node currents and/or voltages and detecting changes...
8897044 Electronic device having complete power-saving mechanism  
An electronic device including a power switch, a switch unit, a power supply unit and a control unit is provided. Two power ends of the power switch are connected in parallel with two connecting...
8891265 Overvoltage limitation in a switch-mode converter  
A switch-mode converter including an inductive transformer having a secondary winding associated with at least one first switch, including, in parallel with the first switch, at least one first...
8890379 Rotating rectifier assembly and method  
A rectifier assembly and method are provided. The rectifier assembly includes a cover comprising a flange having an annular channel extending around an outer circumference of the flange, an...
8891266 Monolithic high voltage multiplier having high voltage semiconductor diodes and high-k capacitors  
High voltage diode-connected gallium nitride high electron mobility transistor structures or Schottky diodes are employed in a network including high-k dielectric capacitors in a solid state,...
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...
8836291 Battery charger and battery charging method  
A rectification processor includes rectifier elements that control charge to batteries independently for each of the batteries. A charge-state detector detects charge states of the batteries from...
8836166 Power management with over voltage protection  
This document discusses, among other things, systems and methods to provide an internal supply rail with over voltage protection using a host power source, an external power source, and a switch...
8816752 Adaptive triac controller  
A low voltage AC power controller uses a line coupled capacitor AC to DC converter circuit to obtain energy from AC line power supplied to an AC load and may be used with an external high voltage...
8804388 Active rectification control  
An active rectification system includes an active rectifier, a pulse width modulation (PWM) control, and a closed loop vector control. The PWM control portion is configured to control switching of...
8797775 Driving circuit for low voltage drop bridge rectifier and method thereof  
The embodiments of the present circuit and method disclose a bridge rectifier and a driving circuit. The bridge rectifier having a first input, a second input, a first output, and a second output...
8773879 Bridgeless PFC circuit system having current sensing circuit and controlling method thereof  
The configurations of a bridgeless PFC circuit system and a controlling method thereof are provided. The proposed system includes a bridgeless PFC circuit including a first bridge arm having a...
8760128 Three-phase boost-buck power factor correction converter  
A three-phase boost-buck PFC converter including three independent single-phase boost-buck PFC circuits respectively is provided, which are capable of performing PFC on each phase of the...
8754590 Semiconductor device and power supply device  
A power supply topology is used in which a transistor is provided on the side of an output node of a rectifying circuit. An inductor is provided on the side of a reference node, a resistor is...
8730689 Capacitive power supply  
A capacitive power supply including an input section having input terminals for connection to an AC-mains supply, and a capacitive coupling, a rectification section coupled via the capacitive...
8711594 Asymmetric switching rectifier  
An asymmetric switching rectifier includes a first switching device to allow electric current to flow while in a first state and inhibit electric current in a second state and a second switching...
8711593 Generalized AC-DC synchronous rectification techniques for single- and multi-phase systems  
Various circuit configurations and topologies are provided for single and multi-phase, single-level or multi-level, full and half-bridge rectifiers in which diodes are replaced by combinations of...
8705252 Off line resonant converter with merged line rectification and power factor correction  
An off line resonant converter includes a boost storage inductance circuit coupled to a switcher circuit that includes stacked first and second passive switching devices coupled to the boost...
8698584 Integrated magnetic device for low harmonics three-phase front-end  
An integrated magnetic device for low harmonics three-phase front-end (1) comprising three magnetic sub-assemblies (30), wherein each magnetic sub-assembly (30) comprises a magnetic core without...
8687394 Aircraft power supply and method of operating the same  
An aircraft power supply for providing DC power with improved power quality characteristics. The aircraft power supply includes a transformer control system that can use closed-loop feedback from...
8681517 AC converter, AC converting method, and storage medium for converting an AC voltage with a relatively high frequency into an AC voltage with a relatively low frequency  
An AC converter includes: a switching section, which converts the input AC voltage in response to a control signal and which outputs the converted voltage to a phase that has been selected in...
8664871 High voltage power supply for powering a magnetron in a UV curing lamp assembly  
A power supply for use in a UV curing lamp assembly is disclosed. The power supply is powered by two intermediate frequency (200-400 Hz) low voltage sinusoidal power sources that drive the primary...
8654550 Circulating current detection for redundant power supply  
A system and method for detecting a circulating current in a redundant AC-DC power supply is disclosed. In one embodiment, a redundant AC-DC power supply system can include a first AC-DC power...
8644043 Switching branch for three-level rectifier and method for controlling switching branch for three-level rectifier  
A switching branch for a three-level rectifier and a method for controlling a switching branch for a three-level rectifier are provided. The switching branch includes a first diode and a second...
8644042 Alternate current rectifier circuit and power circuit  
An alternate current rectifier circuit which includes a first diode, a second diode, a first transistor, a second transistor, a third transistor, and a fourth transistor is power saving. The first...
8633466 Compound semiconductor device, method for producing the same, and power supply  
A compound semiconductor device includes: a substrate; a first compound semiconductor layer formed over the substrate; a second compound semiconductor layer formed over the first compound...
8611118 Gate drive controller circuit with anti-saturation circuit and power up circuit therefor  
A high side isolated gate drive controller circuit is presented with an on-time limiting circuit to prevent isolation transformer saturation as well as a universal power up circuit adaptable to...
8593842 Method and apparatus for supplying and switching power  
A dimming power supply includes a power source, a transformer, a full bridge rectifier and a control switch.
8593070 Three-phase LED power supply  
A three phase rectifier rectifies received three phase a.c. power to generate a ripple d.e. voltage. A power distribution bus conveys distribution power comprising the ripple d.c. voltage or an...
8576597 Commutator for bridgeless PFC circuit  
The commutator for a bridgeless PFC circuit is characterized in that a synchronous half-wave rectifier is connected between a bridgeless PFC boost circuit and an AC power source and is coupled to...
8570778 Power converter with a single diode rectifier and a filter  
A power converter, comprising an input circuit having a single diode rectifier (D); and a switcher mode power supply IC (SMPS).
8569963 Cascade boost and inverting buck converter with independent control  
A converter system including a cascade boost converter and inverting buck converter and controller for converting a rectified AC voltage to a DC output current. The system uses inductors and is...
8564986 Regulated output current and slope control  
A current mode output control can have a current mode (CM) region of the high voltage output curve (VI) slope controlled by component selection and arrangement in the construction of high voltage...
8559203 Power source apparatus with harmonic suppression  
A power source apparatus includes: a first alternating current line; a second alternating current line; an electric power inputting portion including a rectifying circuit for rectifying an...
8547712 Power circuit and direct current to direct current converter thereof  
A power circuit is applicable to a Direct Current (DC) to DC converter. The power circuit includes a gate driver circuit and a High Electron Mobility Transistor (HEMT). The gate driver circuit...
8541972 Method for suppressing speed ripple by using torque compensator based on activation function  
Disclosed is a method for suppressing a speed ripple occurring during an operation of an AC motor by using a torque compensator based on an activation function. The method includes the steps of...
8542510 Power supply input device converting discharge resistance  
A power supply input device including a first resistance of a discharge resistance conversion unit connected in parallel to a discharge resistance unit; and a switching unit of the discharge...
8536850 High side controller capable of sensing input voltage and ouput voltage of a power conversion circuit  
A high side controller capable of sensing input voltage and output voltage of a power conversion circuit, including: a first switch, having a control end and two channel ends, the control end...