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7617590 |
Method of manufacturing an embedded inductor
A manufacturing method of an embedded inductor includes the steps of providing a magnetic plastic material, disposing at least one coil into a mold, and injecting or pressing the magnetic plastic...
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7586764 |
Synchronized rectifier filter control device for protecting a power supply from reverse current
A rectifier filter control device for a power supply that includes: A saturable inductor (swing choke), capacitors; and rectifiers connected to a rectifier filter circuit. The rectifier filter...
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7584533 |
Method of fabricating an inductor structure on an integrated circuit structure
A damascene process is utilized to fabricate the segmented magnetic core elements of an integrated circuit inductor structure. The magnetic core is electroplated from a seed layer that is conformal...
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7568278 |
Method of manufacturing inductor
A method for manufacturing an inductor using a system-in-package (SIP) includes forming a first penetration electrode in a silicon substrate; depositing an insulating film on a first surface of the...
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7412766 |
Method of fabricating coil-embedded inductor
A method of fabricating a coil-embedded inductor provides steps for obtaining uniform density of coil-embedded inductor. The cavity of a first die is filled with dust before being flipped, and then...
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7382112 |
Methods and devices for input waveform control in switching power supplies
The invention recognizes that filter size can be reduced substantially as power factor is permitted to deviate below unity in systematic ways. Preferred methods of the invention provide specific,...
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7365998 |
Unregulated isolated DC/DC converter with ripple control
An unregulated isolated DC/DC converter is configured to receive an input signal and to provide an output signal. A ripple control circuit is coupled to the unregulated isolated DC/DC converter,...
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7280938 |
Method for determining a negative sequence component
The invention relates to a method for determining properties of a negative sequence component of a space vector quantity in an electrical network. The method according to the invention includes the...
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7277302 |
12-pulse converter including a filter choke incorporated in the rectifier
The invention provides a 12-pulse converter comprising an autotransformer having a primary winding connected in a delta configuration and two secondary windings connected in star configurations,...
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7266000 |
Controlled inrush current limiter
An improved inrush current limiting circuit provides continuous control of current delivered to a filter capacitor based on the charge state of the filter capacitor.
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7095636 |
Electromagnetic interference filter for an autotransformer
A filter system for attenuating electromagnetic interference (EMI) of an autotransformer-based rectification system that utilizes the leakage inductance of the autotransformer and one or more...
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6950950 |
Technique for conveying overload conditions from an AC adapter to a load powered by the adapter
A constant voltage/constant power AC adapter converts AC voltage to DC voltage to provide power to a plurality of loads. The adapter's output characteristic is approximately a constant voltage as...
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6922883 |
Method for making a non-linear inductor
Non-linear inductor(s) are used to reduce the percent total harmonic distortion of the harmonics in the line currents in the input side rectifier system of an ac drive system. Several constructions...
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6850424 |
Inverter with a line-side and load-side freewheeling pulse converter using SiC switching elements
An inverter includes a mains system side freewheeling pulse converter and a load-side freewheeling pulse converter, which are electrically connected on the DC side via a DC intermediate circuit....
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6844690 |
DC offset compensator
A dc offset compensator receives a three phase ac current signal as an input and provides a dc offset signal correction voltage as an output. The dc offset compensator comprises a processor...
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6735097 |
Method and apparatus of using leakage inductance as a boost inductor
The specification discloses a power factor corrected switching power supply. The power factor corrected switching power supply may utilize, in whole or in part, leakage inductance of a common-mode...
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6697265 |
Wide range DC power supply utilizing voltage doubling output capacitors and inductive choke to extend full power load impedance range
There is provided by this invention a dc power supply that utilizes capacitors in parallel with the diodes of the rectifier bridge in order to increase the full-power load impedance range of the...
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6661680 |
Higher harmonic suppressor element and DC power supply unit using the same
A higher harmonic suppressor element 10 includes a higher harmonic coil 12 for suppressing a higher harmonic and a thermal fuse 14 which is connected in series with the higher harmonic coil ...
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6567283 |
Enhanced conduction angle power factor correction topology
The invention in the simplest form is an improved AC inductor circuit design that is ideal for single boost, or split phase dual boost topologies, and other poly-phase systems improving input power...
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6549436 |
Integrated magnetic converter circuit and method with improved filtering
A converter and rectifier circuit comprises a magnetic core, a first secondary winding, a second secondary winding, a third secondary winding, a first rectifier, a second rectifier and an output...
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6385057 |
Power conversion system and method of power conversion
The invention relates to a method and apparatus for AC/DC conversion with continuous sinusoidal input currents, and a controlled isolated output voltage that shows one or more of the advantage of...
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6288915 |
Converter circuit arrangement having a DC intermediate circuit
A converter circuit arrangement having a DC intermediate circuit (3) includes a transformer (8) having at least two windings (9 and 10). This transformer (8) is connected in the intermediate...
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6262899 |
Power factor corrected UPS maintaining neutral integrity and methods of operation thereof
An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative...
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6201715 |
Synchronous frame regulation to extract a positive sequence component of a line voltage
A power distribution system includes an active rectifier and a controller for the active rectifier. The controller extracts a positive sequence component of a Park vector representing line voltage;...
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6151228 |
Filter apparatus for use in an inverter apparatus
A filter apparatus has a current-detecting coil. The coil detects a high-frequency leak current flowing from the phase-windings of a motor to the earth terminal through the closed case of a...
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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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6091207 |
Pump support choke
A pump supporting inductor (L1) is added to a half-bridge oscillator circ for a low-pressure discharge lamp (E) having a capacitive pump path, which inductor improves the pumping action of the pump...
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6084786 |
Converter system with power factor and DC ripple control
An AC to DC converter is controlled so that its output DC is substantially ripple free and so that its input AC has substantially unity power factor. The AC to DC converter is controlled in...
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6075715 |
Power source device
A power source device is so constituted that a first capacitor connected across DC output terminals of a rectifier is made to be of a relatively small capacity, a resonance circuit is formed by a...
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6038149 |
Lamp discharge lighting device power inverter
A power supply device and a discharge lamp lighting device which are capable of reducing high harmonic elements and improving a crest factor. A full-wave rectifying circuit is connected to a...
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6021054 |
Smoothing circuit for switching power supply for reduction of noise
In a smoothing circuit for a switching power supply having a reactor and a capacitor, the circuit includes a resistor connected in series to the capacitor, a MOSFET connected parallel to the...
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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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5920471 |
Method and apparatus for automatic average current mode controlled power factor correction without input voltage sensing
A method for preparing power factor control integrated circuits which generate linear pulse width modulation (PWM) waveforms is presented. The method of pulse width modulation waveform generation...
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5886884 |
Passive ripple filter for zero voltage-zero current switched full-bridge DC/DC converters
The present invention is a circuit for zero voltage-zero current switching in a full-bridge DC-DC converter including a transformer for inducing the current and the voltage onto the secondary side...
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5818705 |
Portable computer having built-in AC adapter incorporating a space efficient electromagnetic interference filter
An internal AC adapter which incorporates a space efficient EMI filter is positioned within a main chassis portion of a portable personal computer having at least one energy-demanding component...
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5804953 |
Power converter for converting AC shore power to shipboard use
A power converter for converting shore power voltage, phase, and frequency for shipboard use includes a variable inductance input transformer that can be connected to the shore power. The primary...
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5559396 |
Ballast filtering scheme for reduced harmonic distortion
A ballast filter in which the ballast can operate at a total harmonic distortion of power line current of less than 10%. Power dissipated by the filter when at a THD of less than 10% is relatively...
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5416687 |
Power factor correction circuit for AC to DC power supply
A saturating inductor or transformer is used to shape input current flowing into an alternating current (AC) to direct current (DC) power supply to correct the power factor for the supply. If a...
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5362945 |
Godet for heating an advancing yarn
A godet for heating an advancing yarn including a rotatably mounted godet casing of magnetically conductive material, a stationary primary winding, and a power supply for powering the primary...
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5327333 |
Push push DC-DC reduced/zero voltage switching converter with off-set tapped secondary winding
A DC-DC converter utilizes a tapped transformer secondary winding as a means of achieving output voltage ripple cancellation. This ripple cancellation occurs at a specified input voltage. It...
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5224029 |
Power factor and harmonic correction circuit including ac startup circuit
A circuit for correcting power factor and for reducing ac line current harmonic components in conjunction with bridge-connected capacitive-filtered loads and for providing a source of ac startup...
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5172308 |
DC-DC converter with transformer having a single secondary winding
In a DC-DC converter, the primary circuit has a bridged switching circuit which applies an input CD voltage to the primary winding of a transformer in response to turn-on pulses to generate...
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5162963 |
Surge eliminator for switching converters
A power supply including a source of AC power, a filter including inductive elements, and rectifying circuitry. Where the AC source comprises a sinewave source, the filter includes inductive and...
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5148360 |
Fourth order damped lowpass filter for obtaining high power factor and low total harmonic distortion
An arrangement includes a network for connection between an AC power supply and the input of a DC power supply containing rectifiers and a filter capacitor. The network forms a fourth order, damped...
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5148358 |
Rectifier commutation current spike suppressor
A circuit for reducing the commutation transient in a switch-driven (12) free-wheeling rectifier (20) applied to a load (10) via a continuously conducting energy conducting inductor (28), in which...
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5148359 |
Network for obtaining high power and low total harmonic distortion
An arrangement includes a network for connection between an AC power supply and the input of a DC power supply containing rectifiers and a filter capacitor. The network forms a third order, damped...
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5119284 |
Efficient power supply post regulation
High efficiency, post regulation of auxiliary outputs in multiple output-power supplied is provided by connecting a regulating switching device in parallel with a filter inductor connected in the...
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5075839 |
Inductor shunt, output voltage regulation system for a power supply
High efficiency, post regulation of auxiliary outputs in multiple output-power supplies is provided by connecting a regulating switching device in parallel with a filter inductor connected in the...
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5034972 |
Method of producing thin sheets and use of such sheets for the production of X-ray masks
A method of producing thin sheets that are stretched over a frame and have planar and smooth surfaces with a low density of defects, and to the use of such sheets for the production of X-ray masks,...
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5019954 |
AC/DC conversion with reduced supply waveform distortion
Method and apparatus for performing AC/DC conversion to provide a regulated DC output with reduced distortion of the AC supply waveform. An AC supply is filtered and rectified to provide a DC...
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