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6782513 |
High power factor integrated controlled ferroresonant constant current source
A method of designing a high power factor integrated ferroresonant constant current source includes the steps of providing an input coil disposed about a ferromagnetic core and to be coupled to an...
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6178098 |
Phase-shifted post-regulator, method of operation thereof and power converter employing the same
For use in a power converter having an inverter coupled to an output rectifier, a post-regulator, a method of operating the same and a power converter incorporating the post-regulator or the...
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5956238 |
Blocking time maintenance circuit for ZVS converters
The blocking time maintenance circuit is applied to a resonant-transition ZVS power converter having saturable core reactors to induce a current in the primary of the transformer which enables ZVS....
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5939998 |
System and method for reducing quiescent current in a microcontroller
A system having reduced quiescent current drawn from a power supply. The system includes a device having a status. Moreover, the system includes a microcontroller, having an active and a sleep mode...
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5903417 |
Self-excitation type switch power supply unit with overcurrent protection
A self-excitation type switch power supply unit with overcurrent protection. For adopting a simple and reliable current negative feedback protective circuit to coordinate with a complementary...
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5737203 |
Controlled-K resonating transformer
An LC resonant circuit. The resonant circuit includes a resonant capacitor and a transformer. The transformer comprises a magnetic core having a primary winding, secondary winding and control...
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5682304 |
Superconductive electromagnetic energy storage apparatus and a method for storing electromagnetic energy
A superconductive system for receiving electromagnetic energy from an outside source, storing electromagnetic energy in two interacting forms of DC and AC electric current, and delivering...
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5656870 |
Current control for superconducting magnetic energy storage system
A superconducting magnetic energy storage system for applying power to a load includes a superconducting magnet, the inductor of which is supplied with current via a source which may be preset to a...
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5568372 |
Circuit for detecting negative output rails
A detection circuit for use in an electrical power converter having at least one negative output rail, for detecting the voltage of the negative output rail and for converting the voltage to a...
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4980811 |
Power source apparatus
A power source apparatus includes a transformer having a plurality of paired winding portions of primary and secondary windings wound around cores divided by a gap, a driver, connected to the...
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4862040 |
Frequency-modulated inverter-type ballast
In an inverter-type fluorescent lamp ballast, the inverter is powered from an ordinary electric utility power line by way of a rectifier means providing to the inverter a DC voltage having...
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4858095 |
Magnetron drive apparatus
In a magnetron drive apparatus a high frequency voltage converted and outputted by a frequency converter is inputted to a primary winding of a transformer and a high voltage power outputted from a...
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4853611 |
Inductive, electrically-controllable component
An inductive component for universal use in any electrical/electronic circuits, whose coefficient of self-induction (L) is independent of the signal, is constant, electrically controllable and can...
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4841428 |
Non-saturating magnetic amplifier controller
A magnetic amplifier including a magnetic core having a primary leg, a secondary leg, and a control leg. A primary winding is wound about the primary leg of the magnetic core for generating a...
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4833338 |
Ferroresonant regulator for inductively coupled power distribution system
A ferroresonant regulator for use in an inductively coupled high frequency power distribution system. A constant current resonant power source, comprising a sine wave oscillator (12), an amplitude...
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4816986 |
Power control device for the magnetron of microwave oven
A power control device for a microwave cooking oven includes a regulator of the anode voltage of the magnetron and a heater voltage source. The anode voltage regulator includes a d.c. voltage...
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4811187 |
DC-DC converter with saturable reactor reset circuit
A DC-DC converter having a transformer having a primary winding and a secondary winding; means for supplying DC input voltage to the primary winding; at least one switching element connected...
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4802080 |
Power transfer circuit including a sympathetic resonator
A power transfer circuit includes first and second windings (L1, L2) sharing a common magnetic core (101). Each winding has associated with it a parallel capacitor to thus form a pair of "tank"...
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4800476 |
PWM inverter with a saturable core
A PWM inverter including a saturable core and a main circuit comprising a series circuit of a main winding and a resistor in which switching means applies a DC voltage across the main circuit by...
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4791542 |
Ferroresonant power supply and method
A power supply is disclosed which comprises a ferroresonant circuit, the ferroresonant circuit including a transformer with a core of magnetic material, a primary winding, a secondary winding, and...
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4788634 |
Resonant forward converter
A resonant forward converter at a switching frequency of 10 MHz provides a small volume point-of-load converter for distributed power systems. The leakage inductance of a transformer is made...
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4692854 |
Method and apparatus for modulating inverter pulse width
A method and apparatus are disclosed for use with a battery powered inverter for powering a load through a ferroresonant transformer. The current flow through the inverter-ferroresorant transformer...
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4656412 |
Ferroresonant flux coupled battery charger
A battery charger for incorporation into an electric-powered vehicle is disclosed. The charger includes a ferroresonant voltage-regulating circuit for providing an output voltage proportional to...
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4631652 |
Frequency controlled resonant regulator
The primary winding of a high leakage inductance power tranformer is coupled to a source of unregulated voltage and to a square wave voltage generator that includes first and second alternately...
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4631471 |
Inductor apparatus for application of ferroresonant regulators
An inductor structure is combined with a ferroresonant regulator as a filter inductor in one instance, and as a regulating inductor in another. In one example, a ferroresonant voltage regulator...
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4626976 |
Switch mode power supply having magnetically controlled output
A magnetically controlled switching regulator which controls an output voltage using a saturable reactor, wherein the saturable reactor is constituted by a first winding through which an output...
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4605999 |
Self-oscillating high frequency power converter
A self-oscillating power converter utilizes a MOSFET power transistor switch with its output electrode coupled to a tuned network that operatively limits the voltage waveform across the power...
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4604556 |
Television receiver load compensation circuit
A deflection circuit is coupled to a horizontal deflection winding for generating scanning current in the winding. A retrace pulse voltage is developed across the deflection winding during the...
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4595973 |
Switching power supply
A switching power supply has a saturable transformer provided with first to fourth windings. The first winding is inserted in series in a first path from a DC power source to a primary winding of a...
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4593167 |
Electronic microwave oven power supply
A power supply for a magnetron is adapted to be powered from a regular power line and comprises an inverter means operable to provide an AC voltage of relatively high frequency. This relatively...
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4558229 |
Series ferroresonant regulated rectifier with added capacitor shunting the saturating reactor winding
A series type ferroresonant regulator is modified by adding a second ferro-capacitor in parallel with the primary winding of the saturating transformer. This arrangement allows the transformer to...
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4553199 |
High frequency power supply device
A high frequency power supply device has an inverter circuit and an output circuit connected thereto. The inverter circuit includes a diode and a capacitor being connected in parallel to an output...
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4519022 |
Ripple reduction circuit for an inverter
A ripple reduction circuit for an inverter which converts DC power supplied on DC buses into AC power to drive a load includes a sensing transformer having a primary winding coupled to one of the...
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4471422 |
Dc-to-ac Inverter
A dc-to-ac inverter employing a control low power section and a power section. The low power section comprises a square wave generator, cross-coupled NOR latches and low level transistor switches...
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4466041 |
Fault protection system for power supplies that use ferro-resonant transformers
A fault detection system for use in power supply systems using ferro-resonant transformers is presented. Current sensing means are used to sense the current flowing in the ferro-resonant circuit...
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4465966 |
Controlled ferroresonant voltage regulator providing immunity from sustained oscillations
The invention is a controlled ferroresonant power supply with an improved feedback circuit resulting in improved output stability. The feedback circuit is responsive to the low voltage secondary...
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4460954 |
Ferroresonant power supply
An improved ferroresonant transformer for a ferroresonant power supply, such as may be used for charging storage batteries, is provided by placing damping means, such as a strip of non-magnetic...
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4455600 |
Single phase, double-ended thyristor inverter with choke-coupled impulse commutation
A parallel inverter circuit for converting DC voltage to a variable AC voltage. One terminal of the DC source is connected to an inductor and, in turn, through a pair of gate-controlled, main...
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4446405 |
Television receiver ferroresonant load power supply
To regulate a supply voltage for a television receiver load circuit, such as the ultor voltage for a high voltage circuit, the primary winding of a transformer is coupled to a source of alternating...
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4439822 |
Method and apparatus for detecting and preventing impending magnetic saturation in magnetic materials
A method and apparatus is disclosed for detecting an impending saturation in nonlinear magnetic material for particular operating conditions, such as in a core of a power transformer T 1 of a...
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4439722 |
Ferroresonant power supply stabilizer circuit for avoiding sustained oscillations
A stabilization circuit is provided for use with a ferroresonant power supply to maintain a steady output voltage during power line transients, rapid load changes, or no load condition. The...
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4435746 |
Inductive reactive voltage regulator
The DC secondary output voltage of a high voltage switched-type power supply is regulated by automatically increasing or decreasing the amplitude of the primary circuit retrace pulse to compensate...
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4429260 |
Television receiver power supply ferroresonant load circuit provided with a redundant operating capability
A self-regulating power supply for a television receiver includes a transformer with a primary winding coupled to a source of input voltage for developing an alternating polarity supply voltage...
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4395751 |
Flux-balanced variable frequency inverter
Replacing the timing core of a conventional two-core inverter with a magnetic amplifier allows for control of frequency and for B-H loop symmetry. Switching of the magnetic amplifier results in...
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4339792 |
Voltage regulator using saturable transformer
A voltage regulator using a saturable transformer comprises a transformer having a primary and secondary windings, an AC power source for supplying the primary winding a fluctuating alternating...
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4325008 |
Clamp assisted cycle control regulating system
A precision regulated power supply for charging an energy storage capacitor wherein regulation is achieved using a triac to interrupt a connection between a primary winding of a transformer and a...
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4308495 |
Transformer for voltage regulators
A transformer for voltage regulators has a first core provided with four legs and two common base plates, which are magnetically joined to the four legs, with an input winding being wound on the...
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4285023 |
Rectifier system with failure alarm circuitry
A rectifier unit for supplying power to a D.C. load including a transformer having a primary, a secondary and a saturable core, the secondary defining an output section and a control section. A...
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4274071 |
Three-phase ferroresonant transformer structure embodied in one unitary transformer construction
A three-phase transformer structure has a double-window magnetic structure with an independent flux path encircling each window and an outer flux path encircling both windows. A shunt path for the...
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4270082 |
Open-circuit shunt-regulated high-voltage circuit
Shunt regulation for a high-voltage circuit including a ferroresonant transformer has control circuitry associated with a low-voltage control winding on the transformer, the control winding being...
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