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6215678 |
Arc plasma-joule heated melter system for waste treatment and resource recovery
Methods and apparatus for treating waste are provided. Waste is converted in an arc plasma-joule heated melter system utilizing one or more arc plasma electrodes and a plurality of joule heating...
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6212083 |
Single-phase rectifier
This single phase rectification apparatus connects a full wave rectification circuitry (3) to a single phase A.C. power source (1) through a reactor (2), connects a pair of smoothing diodes (5)...
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6198644 |
Rectifying/smoothing circuit and double-ended converter
A rectifying and smoothing circuit (3) which includes a first inductor connected between one end (2b1) of an output winding of a transformer (2) and a low potential-side output portion (16b), a...
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6191564 |
Power factor correcting electrical converter apparatus
A power factor correcting eletrical converter apparatus receives an alternating electrical input signal from a power source. The apparatus preferably includes an input tracking circuit connected...
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6181588 |
Constant polarity input device including synchronous bridge rectifier
A circuit including bridge rectifier, switches across one or more of the diodes of the bridge rectifier, and a comparator providing control signals to the switch or switches can be constructed to...
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6169671 |
Snubber circuit for a power switch and recitifying diode and power converter employing the same
For use in a power converter having a power switch subject to switching losses and a rectifying diode subject to a reverse recovery condition, a snubber circuit and related method to mitigate...
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6108222 |
Power factor correction circuit
A power factor correction circuit includes a series connection of a bridge rectifier, a first winding, a diode, and an electrolytic capacitor, a series connection of the electrolytic capacitor, a...
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6101113 |
Transformers for multipulse AC/DC converters
In a 12-pulse converter system a 3-phase auto transformer with 4 windings per phase is used to power two 6-pulse converter bridges connected in parallel with a large dc filter capacitor. The...
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6101107 |
Snubber circuit, voltage converter circuit and method in such a snubber circuit
The present invention relates to a snubber circuit, a voltage converter circuit as well as a method where the voltage converter circuit comprises a coupling element (DF), which can be influenced to...
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6054816 |
Active snubbing in a discharge lamp ballast
A snubbing network is provided for reducing electromagnetic ("EM") radiation from and power dissipation of a lamp discharge ballast. The snubbing network employs at least one active device. That...
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6052294 |
Power supply snubber reset circuit
For use in a power supply having a rectifying diode and a snubber circuit that includes a snubber inductor for absorbing a portion of a reverse recovery current associated with the rectifying...
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6046916 |
High and low d.c. voltage power supply
A device for providing a high d.c. voltage supply and a low d.c. voltage supply. The device includes, in parallel, a first diode connected in series with a capacitor, a rectifier having a polarity...
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6038152 |
Active rectifier utilizing a fixed switching pattern
An active rectifier circuit includes a rectifier bridge having a plurality of passive rectifiers and a switching element coupled across each passive rectifier. A control circuit is coupled to the...
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6031750 |
Constant current supply over a wide range of input voltages
Two transistors are arranged as a Darlington amplifier to produce a constant current through an output resistor coupled to the emitter of the second transistor. AC power is supplied to a full wave...
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6031745 |
Time multiplexed power supply
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6018472 |
Method and apparatus for power factor correction
A method and apparatus for power factor correction. The present invention provides passive power factor correction for power supplies that supply more than 200 Watts. In one embodiment, power...
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6018471 |
Methods and apparatus for treating waste
Methods and apparatus for treating waste are provided. Waste is converted in an arc plasma-joule heated melter system utilizing one or more arc plasma electrodes and a plurality of joule heating...
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6014325 |
Controlled DC power supply for a refrigeration appliance
A controlled DC power supply for a refrigeration appliance is disclosed for reducing heat dissipation and power loss. The refrigeration appliance has AC-powered components, such as compressors and...
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6005779 |
Rectification and inversion circuits
A circuit used to convert a DC input to an AC output includes a pair of series circuits. Each of the series circuits is in parallel with the DC input and includes a switch and a transformer...
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5991178 |
VHV transformer/rectifier for surface mounting
A miniaturized VHV transformer/rectifier for surface mounting on a screen-printed ceramic substrate. The primary winding and secondary windings are wound on separate limbs of the magnetic circuit...
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5991182 |
Active rectifier having minimal energy losses
An active rectifier used in a power supply circuit comprises a diode (4) connected between in input terminal (9) and an output terminal (8). A transistor (2) is formed in a substrate (50) and has a...
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5991183 |
Polyphase voltage converter
A polyphase voltage type converter is provided in which ac switches are provided between a power supply and a diode bridge, and reactors that are star-connected are connected to input terminals of...
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5986900 |
Ground loop elimination
The inventor has created several power supplied to eliminate or greatly reduce the ground loop problem. The inventor has discovered that the ground loop distortion is caused by the switching from...
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5986904 |
Self-regulating lossless snubber circuit
A lossless snubber circuit is described for use with power converters, particularly asymmetric half-bridge converters. The snubber circuit provides a clamping circuit which has a clamping diode and...
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5982649 |
Power supply circuit for a control circuit
A power supply circuit is provided for generating a low voltage for powering a control circuit. The power supply circuit is connected to a voltage source having a high voltage relative to the...
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5943225 |
Circuit for removing a peak reverse voltage generated from a power supply source
A circuit is disclosed comprising a switching rectification diode for rectifying a reverse transient voltage, a charging capacitor for charging an output voltage from the switching rectification...
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5936857 |
Power converter having multiple output voltage capability
For use in a power converter having first and second output diodes coupled to a secondary winding of an isolation transformer and first and second output inductors, coupled to the first and second...
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5933342 |
Rectifier with alternative path for freewheeling current
A rectification circuit comprises a diode full-wave bridge rectifier, a freewheeling current path and a blocking diode coupled between the rectifier and the freewheeling current path to cause...
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5929663 |
Control circuit for distributed electrical equipment
A control circuit for distributed electrical equipment includes a relaxation oscillator configured for voltage to frequency conversion whereby the output frequency is proportional to the input...
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5930133 |
Rectifying device for achieving a high power efficiency
A tunnel diode is used as a rectifying device. The tunnel diode is so implemented as to suppress a flow of a current relative to an applied forward voltage of AC which is greater than a voltage at...
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5920474 |
Power supply for electrostatic devices
A power supply method particularly adapted for use with an electrostatic particulate collection device to provide substantially ripple-free DC power for improved operation. The power supply is...
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5909365 |
Leakage current power supply
An electronic power supply (100) receives power from an AC source (10) and supplies power to a load (20) that is referenced to earth ground (30). Power supply (100) comprises a power converter...
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5907481 |
Double ended isolated D.C.--D.C. converter
A D.C.--D.C. down converter utilizes a controlled converter primary switching circuit and a full-wave rectified secondary circuit employing synchronous rectification. An isolation transformer...
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5886892 |
Power supply with improved inrush circuit for limiting inrush current
A new and improved rectifier power supply operates in a low voltage mode of operation and a high voltage mode of operation without user intervention and includes an inrush current limiting device...
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5883502 |
Power rectifier circuit
A mains rectifier circuit for power supply units, in particular for switched-mode power supplies, having a full-wave rectifier (D1 . . . D4) which is connected to the mains voltage and having a...
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5867381 |
Full-wave rectifying device having an amplitude modulation function
A full-wave rectifying device having an amplitude modulation function receives energy emitted from a transceiver via an external antenna and then rectifies it into a DC power source for use by an...
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5844793 |
High-voltage transformer for a televison receiver including separated partial windings tuned to different harmonics
A high-voltage transformer for a television receiver is known to be tuned to a specific harmonic of the frequency of the flyback oscillation in order to reduce the internal resistance of the...
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5835369 |
Power factor and crest factor circuit
A power factor and crest factor correction circuit for a power distribution network of the type comprising a low power source for supplying a plurality of ports with an ac signal is disclosed. Each...
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5828562 |
Double discharge circuit for improving the power factor
The present invention relates to a device for improving the power factor of a rectifying bridge supplied by an a.c. voltage and meant to issue a rectified d.c. supply, including two capacitors...
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5828563 |
Single phase input hybrid rectification method employing auxiliary rectification
A single phase AC input voltage is subjected to a single-phase full-bridge rectifier to obtain a first rectified voltage. The first rectified voltage has a fundamental DC component and a harmonic...
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5808882 |
Three-phase bridge rectifier
A three-phase bridge rectifier includes three bidirectional switching circuits each including a single-phase rectifier circuit having four single-phase bridge-connected diodes and a semiconductor...
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5801933 |
High efficiency voltage converter and regulator circuit
A voltage converter and a method for converting AC to DC. A MOSFET (42, 118) conveys current from a full wave rectifier to charge a capacitor (60) that supplies current to a load (64). In a first...
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5793626 |
High efficiency bimodal power converter and method of operation thereof
A bimodal power converter, having an input couplable to a voltage source, provides a charging current to at least one of first and second serially-coupled output energy storage devices. The bimodal...
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5786991 |
Programmable voltage source
A programmable, low-current voltage source for small-signal electronic equipment, such as portable cellular telephones, is achievable by generating and applying a bias voltage and a reference...
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5784266 |
Single magnetic low loss high frequency converter
An improved magnetically integrated power converter which are provided specifically for use with power supplies with high density requirements. The converters comprise an integrated magnetic device...
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5781428 |
Transformer for 12-pulse series connection of converters
In a multi-pulse converter system a three-phase transformer with tapped wye-connected primary winding and isolated delta-connected secondary winding is used to power two 6-pulse converter bridges...
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5777868 |
Electrical Plug
A plug is diclosed that is adapted to be inserted into a standard electrical outlet and has a built-in integrated circuit for rectifying the alternating current received from the outlet and...
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5777866 |
Power factor control for switched mode rectifiers with improved representing of currents in EMI capacitive elements
A power factor correction system with an EMI line filter at the input includes circuitry to sense the capacitor current of the EMI filter to improve the accuracy of the power factor enhancement....
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5774349 |
High-voltage generator
A high-voltage generator for high d.c. voltages, particularly for feeding an x-ray tube has secondary windings applied by a printed technique on printed circuit boards that are held at a common...
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5774062 |
Tag responsive to high-frequecy for varying capacitance of tuning capacitor
A memory stores optimum capacitance values of a variable capacitor obtained by measuring in advance depending on temperatures. In practical use, a controller reads an optimum capacitance value from...
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