Randy C Russell

US Patent:

46653236, May 12, 1987

Filed:

Oct 25, 1984

Appl. No.:

6/664655

Inventors:

Randy Russell - Northbrook IL
Wayne F. Salata - Chicago IL
Dennis L. Stephens - Niles IL

Assignee:

Zenith Electronics Corporation - Glenview IL

International Classification:

H02J 304
H02M 700

US Classification:

307 75

Abstract:

A DC power source is capable of automatically adapting to either a 120 or 240 VAC input and of providing a single regulated output range for either of the AC voltage levels provided thereto. The power source detects the AC input voltage and automatically doubles the lower voltage while allowing the higher rectified voltage to pass through. The power source includes an electronic switching arrangement responsive to the input voltage level for automatically doubling the lower AC input voltage when detected as well as timing circuitry to allow for transitory fluctuations in the input voltage level while maintaining a level DC output voltage.

US Patent:

45816905, Apr 8, 1986

Filed:

Mar 15, 1984

Appl. No.:

6/589965

Inventors:

Randy G. Russell - Northbrook IL

Assignee:

Zenith Corporation - Glenview IL

International Classification:

H02M 3337

US Classification:

363 17

Abstract:

A switched-mode power supply provides a plurality of directly regulated DC output voltages. The power supply includes a first inverter-coupled transformer for providing first and second DC output voltages, with a feedback loop provided from a first output to the inverter for regulating the first DC output voltage. A second transformer is coupled across the first and second output lines of the first transformer and is further coupled across the second output lines by means of a switching regulator circuit including a second feedback loop for regulating the second DC output voltage. By proper selection of the number of turns of the second transformer, the regulator is capable of either substantially increasing the second output voltage when the switching device is on while lowering the output voltage very little when the switching device is off, or increasing the second output voltage very little with the switching device on while substantially lowering the output voltage when the switching device is off. This permits the use of a large turns ratio in the second transformer in combination with smaller diodes and transistors which carry current equal to the output current divided by the second transformer's turns ratio. Reduced output current provides more efficient power supply operation, while the use of smaller semiconductors reduces power supply cost.

US Patent:

54931819, Feb 20, 1996

Filed:

May 8, 1995

Appl. No.:

8/436789

Inventors:

Peter W. Shackle - Arlington Heights IL
Randy G. Russell - Glen Ellyn IL
Kent E. Crouse - Hanover Park IL

Assignee:

Energy Savings, Inc. - Schaumburg IL

International Classification:

H05B 3900

US Classification:

315241R

Abstract:

An electronic ballast includes a boost circuit, a low voltage control circuit, and a driven inverter in a half-bridge, push-pull, series resonant, parallel loaded configuration. The boost circuit includes a low voltage output for powering the control circuit. In the event of a fault, the control circuit shuts off the boost circuit and the inverter. A sense capacitor is in series with the lamps and the voltage across the capacitor prevents a timer in the control circuit from shutting off the ballast. The timer circuit waits a period longer than the time it takes for the lamps to start normally. The sense capacitor is either in series with the lamp across the resonant capacitor or is in series with the resonant capacitor.

US Patent:

55392814, Jul 23, 1996

Filed:

Jan 23, 1995

Appl. No.:

8/376774

Inventors:

Peter W. Shackle - Arlington Heights IL
Randy G. Russell - Glen Ellyn IL
Kent E. Crouse - Hanover Park IL
Ronald J. Bezdon - Antioch IL

Assignee:

Energy Savings, Inc. - Schaumburg IL

International Classification:

H05B 3702

US Classification:

315224

Abstract:

An electronic ballast includes a converter coupled to a variable frequency inverter and a series resonant, parallel loaded output coupled to the inverter. The frequency of the inverter increases when the supply voltage from the converter decreases. The converter includes a full wave rectifier producing a first voltage and an unregulated boost circuit producing a second voltage which is combined with the first voltage to produce the supply voltage. The amount of boost, and therefore the magnitude of the supply voltage, is varied to provide dimming. Dimming is controlled mechanically, via a potentiometer, or electrically, via a control input. Dimming also occurs in response to changes in the first voltage, i. e. from changes in the voltage on an AC power line or from changes in the voltage provided by a capacitive dimmer coupled between the ballast and an AC power line.

US Patent:

55005764, Mar 19, 1996

Filed:

Apr 15, 1994

Appl. No.:

8/227953

Inventors:

Randy G. Russell - Glen Ellyn IL
Kent E. Crouse - Hanover Park IL
Peter W. Shackle - Arlington Heights IL
Ronald J. Bezdon - Antioch IL

Assignee:

Energy Savings, Inc. - Schaumburg IL

International Classification:

H05B 3702

US Classification:

315307

Abstract:

An electronic ballast has a high voltage portion and a low voltage portion. The high voltage portion includes a converter, having a variable frequency boost circuit, and a half-bridge, driven inverter having a series resonant, direct coupled output. The low voltage portion of the ballast includes a control circuit and fault detectors for shutting off the boost circuit and the inverter circuit. The fault detectors consume very little power when the ballast and lamp are functioning normally. Separate magnetics are used for boost, inverter, and output. Each magnetic is essentially cubic in shape and carries as little current as possible.

US Patent:

54612870, Oct 24, 1995

Filed:

Feb 25, 1994

Appl. No.:

8/202053

Inventors:

Randy G. Russell - Glen Ellyn IL
Peter W. Shackle - Arlington Heights IL
Kent E. Crouse - Hanover Park IL

Assignee:

Energy Savings, Inc. - Schaumburg IL

International Classification:

H05B 3702

US Classification:

315209R

Abstract:

An electronic ballast includes a triggered boost circuit, a driven inverter, and a low voltage signal generator in a a half-bridge, push-pull, series resonant, parallel loaded configuration. The boost circuit is triggered by a voltage from the inverter and the inverter is controlled by the low voltage signal generator. The boost circuit includes a low voltage output for powering the signal generator. In the event of a fault, the operation of the signal generator is interrupted, thereby shutting off the boost circuit and the inverter. A DC blocking capacitor is in series with the lamps and a resistor is connected in parallel with the DC blocking capacitor. The ballast is started by a pulse of displacement current through the lamp filaments to the boost circuit. Since the lamp filaments must be intact, the ballast does not begin a lamp starting sequence until lamps are connected to the ballast.

US Patent:

57479410, May 5, 1998

Filed:

Dec 7, 1995

Appl. No.:

8/568623

Inventors:

Peter W. Shackle - Arlington Heights IL
Randy G. Russell - Glen Ellyn IL
Kent E. Crouse - Haltom City TX
Ronald J. Bezdon - Schaumburg IL

Assignee:

Energy Savings, Inc. - Schaumburg IL

International Classification:

H05B 3702

US Classification:

315224

Abstract:

An electronic ballast includes an inverter producing pulses having a DC component, an output circuit connecting the filaments of one or more lamps in series, and a control circuit for detecting direct current through the filaments. The control circuit includes a capacitor charged by the DC component. When the voltage on the capacitor reaches a predetermined value, the ballast applies a high voltage to the lamps. The predetermined value is not reached unless a direct current passes from the output of the inverter through all lamp filaments to the capacitor. If a lamp filament is not intact, the inverter will not apply high voltage to the lamp.

US Patent:

54404754, Aug 8, 1995

Filed:

Nov 8, 1993

Appl. No.:

8/148295

Inventors:

Randy G. Russell - Glen Ellyn IL
Kent E. Crouse - Hanover Park IL

Assignee:

Energy Savings, Inc. - Schaumburg IL

International Classification:

H02M 112
H05B 3702

US Classification:

363 45

Abstract:

Power factor is increased and harmonic distortion is decreased in a boost circuit by varying the current drawn in phase with the ripple voltage from a rectifying bridge. The boost circuit includes a series connected inductor and switching transistor and the control electrode of the switching transistor is connected to a second inductor. The second inductor is magnetically coupled to the first inductor and provides feedback for sustaining high frequency oscillations in the boost circuit. A third inductor is magnetically coupled to the first and second inductors and to the control electrode of the switching transistor. The voltage from the third inductor is rectified and filtered to remove the high frequency pulses but not the ripple and the voltage is coupled to the control electrode of the switching transistor for changing the power consumed by said boost circuit in phase with the ripple.