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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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8958223 |
Compact high-power diode/thyristor rectifier architecture
A Graëtz-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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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,... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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. |
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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... |
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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... |
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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). |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |