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| Number | Title | Issue Date |
| 7288923 | Voltage-limited electric machine An electric alternator having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits around different portions of the winding which may be configured relative to one another... | 10/30/2007 |
| 7283378 | High efficiency DC link inductor An improved inductor for a DC link that has an auxiliary winding for inducing an opposing magnetic field in a magnetically permeable core with an auxiliary DC current that opposes a magnetic field that a primary winding for the inductor induces along a magnetic path... | 10/16/2007 |
| 7262521 | Variable AC voltage regulation control method and apparatus A method and apparatus is disclosed for providing a regulated voltage output from a variable voltage source, alternately using saturation control and cancelling control to regulate output. ... | 08/28/2007 |
| 7209338 | Active vibration insulator An active vibration insulator includes an electromagnetic actuator, a cyclic-control-signals output device, and an electromagnetic-actuator driver. The electromagnetic-actuator driver includes an asymmetric half-bridge circuit, and an actuating-signals output device... | 04/24/2007 |
| 7132921 | Power supply module and electronic apparatus using the same To reduce pattern resistance including a secondary winding in a power supply module having a pair of secondary windings transformer-coupled with a primary winding. The pair of secondary windings coupled with a primary winding through a transformer is drawn out in bo... | 11/07/2006 |
| 7071582 | Output rising slope control technique for power converter An output voltage rising slope control technique for a power converter is addressed. The output voltage rising slope control technique according to the present invention basically uses a reference voltage generator to precipitate the rising slopes of multiple output... | 07/04/2006 |
| 6975199 | Embedded inductor and method of making A dielectric substrate having an embedded inductor wherein each turn of the inductor traverses several layers such that the top and bottom of each turn of the inductor are parallel to each other but are in different layers and the sides of each turn of the inductor ... | 12/13/2005 |
| 6958920 | Switching power converter and method of controlling output voltage thereof using predictive sensing of magnetic flux A switching power converter and method of controlling an output voltage thereof using predictive sensing of magnetic flux provides a low-cost switching power converter via primary-side control using a primary-side winding. An integrator generates a voltage that repr... | 10/25/2005 |
| 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 AC voltage source. An output coil is to be coupled to a load. A contr... | 08/24/2004 |
| 6490178 | SWITCHING POWER CIRCUIT WHICH SWITCHES VOLTAGE SUPPLIED TO A PRIMARY WINDING OF A TRANSFORMER WITH A SWITCHING ELEMENT TO RECTIFY ALTERNATING CURRENT GENERATED IN A SECONDARY WINDING OF THE TRANSFORMER In a switching power circuit, one end of a primary winding of a transformer having a plurality of windings is connected to a voltage source, and the other end is connected to a return side of the voltage source through a first switching device. At least o... | 12/03/2002 |
| 6147476 | Two quadrant magamp regulator control circuit with fast dynamic response and full holdoff capability A magamp circuit including a saturable reactor for regulating the output energy delivered to a load and having a protective circuit for restricting energy flow to the load in the event of occurrence of a short-circuit at the load. Output energy fluctuatio... | 11/14/2000 |
| 6072709 | Multiple output voltage converter with improved cross-regulation A voltage converter for converting an input voltage into at least a first high output voltage and a second lower output voltage. An input resonant circuit includes a transformer primary winding. At least first and second output circuits, each of which inc... | 06/06/2000 |
| 6046918 | Flux equalized transformer circuit A transformer group in which a multitude of transformers are used to supply energy to a single load. The transformers are connected in series; in order to assist in providing a "flux equalizing" affect, the invention includes a flux equalizer circuit. The... | 04/04/2000 |
| 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 winding wound on the core. The primary winding is loosely coupl... | 04/07/1998 |
| 5691891 | Current balancing arrangement for paralleled diode arrangements A rectifier for a switching power supply or the like. The recitifier has a plurality of diodes coupled in parallel, each diode having in series therewith a saturable inductor and a node disposed between the diode and the inductor to form a diode/inductor ... | 11/25/1997 |
| 5612862 | Method and circuitry for controlling current reset characteristics of a magnetic amplifier control circuit Magnetic amplifier post regulator (54) includes magnetic amplifier (42) that has a main magnetic amplifier winding, reset transistor (76), error amplifier (58), and auxiliary magnetic amplifier winding (220). Magnetic amplifier (42) controllably blocks a ... | 03/18/1997 |
| 5586019 | Voltage converter In the voltage converter, a current flowing through a primary coil of a voltage transformer is turned on/off by FETs, an AC voltage induced at a secondary coil of voltage transformer is rectified and applied to a choke coil including two coils, a saturabl... | 12/17/1996 |
| 4849874 | Single mag amp control system for regulating bipolar voltage output of a power converter A power converter embodying the principles of the invention, and having a positive and negative output utilizes a single magnetic amplifier controller to control two saturable inductor cores utilized to regulate the positive and negative outputs by modula... | 07/18/1989 |
| 4447866 | Supplement to cross regulation in DC to DC converters A variable inductance is placed in series with the diode rectifiers of the auxiliary outputs of a dc-to-dc converter. Increasing or decreasing the value of this inductance affects only the permeance of leakage flux paths which link the transformer winding... | 05/08/1984 |
| 4353113 | Switch mode converters A magnetic amplifier which has a main winding and at least one secondary reset winding, and a core composed of amorphous magnetic material, the amplifier being arranged to operate at a frequency greater than 20 KHz. The invention also includes ... | 10/05/1982 |
| 4005352 | Protection circuit for magnetically controlled d-c to d-c converter A push-pull d-c to d-c power converter which is regulated by a magnetic amplifier utilizing pulse-width modulation to control the switching elements. The circuit provides stable operation by utilizing separate control windings in the magnetic amplifier fo... | 01/25/1977 |
| 4001665 | High efficiency power supply having a reactive buck automatic D.C. voltage regulator D.C. power supply having a reactive buck automatic D.C. voltage regulator which directly controls the rectified D.C. output of a loosely coupled transformer thereby providing load regulation from an unregulated alternating current source. The load current... | 01/04/1977 |
