Jeff Gucyski

US Patent:

6362979, Mar 26, 2002

Filed:

Sep 29, 2000

Appl. No.:

09/672986

Inventors:

Jeff Gucyski - Costa Mesa CA 92627

International Classification:

H02M 3335

US Classification:

363 17, 363 2114, 363 2108, 363 2106

Abstract:

Switching power amplifier and uninterruptible power system each can be built using only 6 power components, including battery and output capacitor. Moreover, line isolation is accomplished. An inductive block includes an inductor and/or a transformer, and provides a return voltage. A first switch selectively applies at least one supply voltage to the inductive block. A first rectifier limits the return voltage, e. g. to the battery voltage. Another capacitor stores a DC voltage and the series-coupled output capacitor provides the output voltage. A sum of the capacitor voltages is positive even at negative peak of the output voltage. A second switch and a second rectifier apply the sum to the inductive block. The output voltage and a current charging the battery can be pure sinusoidal.

US Patent:

6366474, Apr 2, 2002

Filed:

Sep 29, 2000

Appl. No.:

09/676792

Inventors:

Jeff Gucyski - Costa Mesa CA 92627

International Classification:

H02M 3335

US Classification:

363 20, 363 16, 363 89, 323266

Abstract:

The switching power supplies convert AC or DC input voltage into a DC output voltage. Conventional topologies are implemented, wherein power factor correction and/or square-wave switching at resonant transition is accomplished. In a front-end, rectified line voltage is applied to an inductor that attains line current. A diode limits voltage at a front-end output to a holdup voltage stored in a capacitor. A switch selectively applies the holdup voltage to the front-end output. In a DC/DC power supply, a switch selectively applies the input voltage to an inductor that attains a current. A transformer provides primary and secondary voltages in response to the current. A voltage across the inductor is limited to the primary voltage that is stored in a capacitor. The secondary voltage is rectified and applied to another capacitor that provides the DC output voltage. No output inductor is required.

US Patent:

6385056, May 7, 2002

Filed:

Sep 29, 2000

Appl. No.:

09/676793

Inventors:

Jeff Gucyski - Costa Mesa CA 92627

International Classification:

H02J 100

US Classification:

363 15

Abstract:

This instantaneously interruptible power source (I PS) produces a precise AC output voltage. The I PS can be built using only 7 power components, including an output capacitor. Moreover, currents applied thereto are unidirectional and independently developed. In the conventional switching power amplifier or uninterruptible power source, an output inductor continuously delivers a current to an output capacitor. A precise correction is simply impossible since, at the end of every switching cycle, the correction is either insufficient or continues while no longer required. This includes even most sophisticated class-D amplifiers. By contrast, the I PS can instantaneously interrupt the correction and become idle. Without transformation, the output voltage can exceed supply voltages. An inductive block comprises at least one inductor and/or transformer for providing a return voltage.

US Patent:

6639815, Oct 28, 2003

Filed:

May 4, 2002

Appl. No.:

10/139691

Inventors:

Jeff Gucyski - Costa Mesa CA 92627

International Classification:

H02M 112

US Classification:

363 40

Abstract:

The amplifier comprises instantaneously interruptible power source (I PS) for producing a precise AC output voltage. A continuous mode I PS can be built using only 7 power components, including two inductors and an output capacitor. The I PS can instantaneously interrupt the correction and become idle. The inductors each attain a corrective current and provide a return voltage. Two switches are separately coupled in series with the inductors for selectively applying the respective corrective currents between the power supply and the output capacitor. Two diodes limit the return voltages. A converter converts the supply voltage or an internal voltage into an internal supply current. A fine amplifier can employ two low power transistors to rapidly deliver a fine current to the output capacitor. This dramatically reduces output noise and improves accuracy. The converter and the fine amplifier can be combined or used separately.

US Patent:

58962808, Apr 20, 1999

Filed:

Nov 25, 1997

Appl. No.:

8/988335

Inventors:

Jeff Gucyski - Huntington Beach CA
Robert William Johnson - Raleigh NC
Rune Lennart Jonsson - San Diego CA

Assignee:

Exide Electronics Corporation - Raleigh NC

International Classification:

H02M 3335
H02J 700

US Classification:

363 24

Abstract:

An uninterruptible power supply (UPS) includes a transformer, a low voltage converter (02), a rectifier, and a high voltage inverter (01). The low voltage converter comprises a battery, a first switching device (Q3), a second switching device (Q4), and first drive circuits (41, 42). The high voltage inverter (01) includes first and second load terminals adapted to be coupled across a load in an emergency situation; an output capacitor (C); a third switching device (Q1) and a fourth switching device (Q2), and second drive circuitry (43, 44) for driving the third and fourth switching devices from conducting to non-conducting states and vice versa so as to produce a quasi-sinusoidal output voltage waveform across the load terminals.

US Patent:

57368414, Apr 7, 1998

Filed:

May 1, 1996

Appl. No.:

8/595928

Inventors:

Jeff Gucyski - Costa Mesa CA

International Classification:

H02M 3155

US Classification:

323222

Abstract:

The switching power supply attains sinusoidal input current even at a low level of the input voltage. In one embodiment, a node voltage appears between the input terminal and node. A grounded capacitor stores an intermediate voltage. A grounded inductor attains a current. One diode applies the current to the capacitor. Another diode applies the current to the node. A switch selectively applies the intermediate voltage to the node. A boost type converter converts the node voltage into the output voltage. Another switch can be coupled in series with the input terminal to prevent the inrush current.

US Patent:

51463997, Sep 8, 1992

Filed:

Mar 11, 1991

Appl. No.:

7/665950

Inventors:

Jeff Gucyski - Costa Mesa CA

International Classification:

H02M 3155

US Classification:

363 89

Abstract:

The switching power supply has high output power, high efficiency and fixed or variable output voltage. The input voltage may be AC or DC. Preferably, the input current is sinusoidal. Reduced peak currents of switches result in best possible line and component utilizations at any time. In one embodiment, a first converter has an output for converting DC input voltage into a base voltage. A first capacitor is coupled between the DC input voltage and first converter output for storing the base voltage. A second converter is coupled to the first converter output for determining the output voltage. A second capacitor filters the output voltage. Both converters are referenced to ground. A diode applies the DC input voltage to the output.

US Patent:

61217565, Sep 19, 2000

Filed:

Oct 25, 1999

Appl. No.:

9/426347

Inventors:

Robert William Johnson - Raleigh NC
Steven R. Widener - Wake Forest NC
Joseph C. Paulakonis - Chapel Hill NC
Jeff Gucyski - Huntington Beach CA

Assignee:

Powerware Corporation - Raleigh NC

International Classification:

H02J 706
H02J 724

US Classification:

320140

Abstract:

An uninterruptible power supply (UPS) comprises a low voltage converter (02); a coupled inductor (60) comprising a first inductor (63) coupled to the battery, a second inductor (61) coupled to a first output terminal of a rectifier, and a third inductor (62) coupled to a second output terminal of the rectifier; a snubber circuit; and a high voltage inverter (01).