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7599196 |
Universal power converter
Methods and systems for transforming electric power between two or more portals. Any or all portals can be DC, single phase AC, or multi-phase AC. Conversion is accomplished by a plurality of...
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7564706 |
Power factor corrected single-phase AC-DC power converter using natural modulation
A power factor corrected (pfc) ac-dc converter has a modified boost input and a modified buck output. Unlike the prior art boost input, the boost switch returns to the output, not to ground. Unlike...
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7554826 |
Method and apparatus to control output power from a switching power supply
Techniques are disclosed to control output power from a switching power supply. A sample power converter controller circuit includes a control circuit coupled to be coupled to a switch. The control...
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7508158 |
Excitation system for synchronous machine
A synchronous machine regulator is provided to simplify an adjustment work of current distribution to thyristors, the synchronous machine regulator having a circuit board 32 mounting a gate drive...
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7492142 |
DC chopper and method for operating a DC chopper
A DC chopper features a setting device, which sets a required current value signal being dependent on a filtered input voltage such that an oscillation of the input filter device and an oscillation...
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7489116 |
Power factor correction control circuit
A bi-directional boost circuit for power factor correction includes a power factor control circuit and a pair of diodes, a pair of inductors, and a pair of switches. A first diode, a second diode,...
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7486030 |
Universal input voltage device
A universal input voltage device is presented which may receive a wide range of regulated and unregulated input voltages, both DC and a wide range of variable frequency AC, and output a desired...
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7455755 |
Vacuum plasma generator
The invention relates to a vacuum plasma generator for providing a plasma discharge ( 10 ) for treating work pieces ( 5 ) by way of a pulsed plasma process in a vacuum chamber ( 2 ). Said vacuum...
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7336514 |
Electrical power conservation apparatus and method
An electrical power control apparatus and method for power factor correction in a conventional 60 hertz or other conventional frequency electrical AC power supply communicated to an inductive load....
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7279868 |
Power factor correction circuits
A bi-directional boost circuit for power factor correction includes a power factor control circuit and a pair of diodes, a pair of inductors, and a pair of switches. A first diode, a second diode,...
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7208922 |
Voltage regenerator
The invention focuses on a voltage transformer (VT) that includes at least two transformer stages (VT I, VT II), each of them with an input connection and to each of which an input subvoltage U EI...
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7139180 |
Three phase buck power converters having input current control
A three phase buck power converter having input power control is described. The power converter uses a three input buck converter comprising switches for each phase, a catch rectifier, an inductor...
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7002816 |
Power supply apparatus and image forming apparatus using the same
A power supply apparatus includes first and second switching elements respectively controlled by first and second clock signals, a first parallel resonance circuit connected between the first...
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6987680 |
Series chopper with synchronous switching
The invention relates to a series chopper comprising: a pair of input terminals A and B for connecting a DC input voltage Vin, a pair P of breakers SB, ST in series connected by the breaker SB to...
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6909619 |
Spike control apparatus for DC-DC converter
There are disclosed a synchronous rectifying type of DC—DC converter, a DC—DC converter control circuit constituting such a type of DC—DC converter, a monitor circuit for monitoring an...
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6885569 |
Energy converting device
Device for reversible conversion of electric power capable of being connected between at least an input alternating voltage source and at least a load forming an output alternating current source,...
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6879503 |
Cutting electric power converter
A cutting device for reversibly converting electric power between an alternating voltage source and an alternative current source, comprises switching cells each comprising first and second...
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6853156 |
Piezoelectric ceramic light starter
A piezoelectric ceramic light starter, which includes a power switch, a piezoelectric transformer, and a frequency tracking unit, is disclosed. The power switch connected to a pulse width modulated...
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6807076 |
Multiple mode universal power source
A direct conversion programmable power controller receiving polyphase input power at an input power frequency and with a polarity is provided. The controller includes a primary chopper for...
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6789036 |
Microelectronic transient power generator for power system validation
A transient current generator for testing microelectronic power regulator systems is provided. The current generator includes a current source and one or more transistors to provide current or sink...
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6703818 |
AC to AC power converter for electronic devices having substantially different output voltage/current characteristics
A method for performing power conversion provides a converter output AC waveform from a converter input AC waveform, the convertor input waveform having an input power level, an input frequency, an...
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6690588 |
Direct conversion programmable power source controller: three-phase input with programmable single-phase output
The present invention is a system and method for a direct conversion programmable power source controller. The invention uses a sampling rate optimized for a transformer used to isolate or to step...
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6680856 |
Power converter circuit arrangement for generators with dynamically variable power output
A power converter circuit for wind power devices which feed into a high-voltage grid consisting of a power converter circuit arrangement to transform the variable frequency and variable voltage...
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6680603 |
High-efficiency method and pulse generator for generating short voltage pulses
In a high-efficiency method and pulse generator for generating short voltage pulses by means of a voltage booster having a first switch, an inductor and a storage capacitor, the first switch...
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6650556 |
Multi-phase DC—DC converter
A multi-phase DC—DC converter having redundant DC—DC phases or modules. If a DC—DC phase fails, such as from a short circuit, it is decoupled from the output of the DC—DC converter. In some...
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6643151 |
Multiple output dynamically regulated charge pump power converter
A charge pump power converter efficiently provides electrical power by dynamically controlling a switch matrix of the charge pump. Instead of open-loop oscillator-based control, a dynamic...
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6608767 |
Apparatus and method for soft switching of parallel switch assemblies
An apparatus and method for reducing power loss due to switching of a switch mode power converter includes a power converter having a plurality of switch assemblies, each connected in parallel...
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6597138 |
Method and apparatus for controlling power supplied to a motor
A method and apparatus for controlling power supplied to a motor comprising a power controller having a source of electrical power for providing the necessary power to operate the apparatus, an...
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6528977 |
Power supply system provided with photovoltaic generator
A power supply system includes a photovoltaic generator, a load to which electric power is supplied from the photovoltaic generator, an electrical system for receiving a portion of the electric...
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6480404 |
Device for producing electricity from a three-phase network, in particular for a road vehicle
A device for producing electricity, the device comprising a three-phase alternator comprising three windings, a rectifier for converting the AC delivered by the alternator into rectified current,...
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6414866 |
Active filter for a converter having a DC line
An active filter is coupled to a dc line of a converter such as a dc-dc converter. The active filter traps a harmonic frequency component of chopped current on the dc line. A passive EMI filter may...
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6411535 |
Power factor correction circuit with integral bridge function
A power conversion circuit for converting alternating current power to regulated direct current power by a power factor correction circuit having an integral bridge function providing reduced power...
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6381160 |
Converter comprising resonant circuit elements
The invention relates to a converter comprising switching elements for chopping a direct voltage, in which turn-on phases of the switching elements alternate with one another, and comprising a...
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6330171 |
LC filtering with prebiased inductor for a chopping circuit
The invention relates to a control circuit, in particular for a load in an automotive vehicle, comprising a chopping circuit, at least one LC filter (F1) means (20) opposing the saturation of the...
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6327164 |
Chopper circuit, chopper circuit control method, chopper-type charging circuit, electronic device, and timekeeping apparatus
A control circuit for controlling two N-channel FETs determines whether charging has ended by detecting that two P-channel FETs have been off for a prescribed amount of time, based on comparison...
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6327163 |
Solid state pulsed power supply
A solid state power supply is provided which may be formed of a plurality of modules sufficient to support a selected voltage output from the supply. Each module includes a capacitor or capacitor...
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6324078 |
Power source device
A power source device includes a control circuit which controls switching elements in full-bridge arrangement so as, in decreasing an output to a load, to substantially equalize ON timing of one of...
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6300589 |
Plasma cutting or arc welding power supply with phase staggered secondary switchers
A power supply, such as a plasma cutting power supply or a welding power supply, that provides an output to a pair of output terminals is disclosed. The power supply includes a source of voltage...
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6295215 |
AC power supply apparatus with economy mode and methods of operation thereof
A power supply apparatus includes an AC input port, an output port, and a bypass circuit that couples the AC input port to the output port. An AC/DC converter circuit, e.g., a rectifier circuit,...
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6269013 |
Chopping energization control device
A chopping energization control device is made up of a first switching element interposed between one end of a load and one terminal of a power supply, a second switching element interposed between...
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6259236 |
Chopper type switching power supply
An oscillation circuit 1 for controlling the on/off operation of a main switching element 5 is arranged to include a first inductor L1 coupled at its one terminal to a DC power supply, an...
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6178105 |
Circuit arrangement for accurately detecting a direct current derived from clocked electric input values
The apparatus is used for detecting an output direct current (Ia) produced by a pulse controller (PS). This pulse controller (PS) has at least one chopper device (Z) for forming a pulsed...
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6175511 |
Uninterruptable power supply
An uninterruptable power supply in which, even if the consumed electric power of a load is increased, the voltage of a D.C. intermediate circuit is not decreased below a set voltage and the input...
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6166924 |
Device and method of supplying energy from an ac source in an ac to dc converter
In an arrangement for supplying energy from an a.c. voltage source that includes a rectifier bridge (D1) and a converter (TR1, D5, C4), an inductor means (L1) is connected between a first output...
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6111392 |
Power source device including a plurality of switching circuit for power conversion with switching elements used in common
A power source device restricts any increase in a switching current to switching elements commonly used in two such different power source circuits as chopper and inverter circuits, while...
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6088251 |
Linearized duty radio, variable frequency switching regulator
A control system for a switching regulator which linearizes the relationship between the control input signal and the duty ratio of the pulse output. A logarithmic signal generator furnishes a...
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6069804 |
Bi-directional dc-to-dc power converter
A multi-output, multi-directional power converter has an input bi-directional switch and at least a first output bi-directional switch, a coupled inductor having an input winding and at least one...
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6043635 |
Switched leg power supply
A power supply for operating from a switched leg of an AC power line is described. A switch provides current during the beginning of each AC half cycle to an inductor and charges a capacitor. When...
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6031743 |
Fault isolation in a redundant power converter
Aspects for isolating faults in a redundant power converter are described. An exemplary system aspect includes a first switch at an input of the redundant power converter for protecting the...
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5973946 |
Power-factor improvement converter
To improve the power conversion efficiency of a power circuit provided with a power-factor improvement converter and reduce the size, weight, and cost of the circuit, the power-factor improvement...
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