Steven Bruce Jenkins

US Patent:

54499810, Sep 12, 1995

Filed:

Feb 17, 1993

Appl. No.:

8/018774

Inventors:

Samuel H. Auld - Reno NV
Mangalam K. Balachander - Kent WA
Douglas W. Brooks - Carson City NV
Steven M. Jenkins - Dayton NV
Jacek J. Marcinkowski - San Pedro CA

Assignee:

Bruce Industries, Inc. - Dayton NV

International Classification:

H05B 3702

US Classification:

315308

Abstract:

A relatively high efficiency, relatively light weight, relatively small electronic ballast or AC power controller for use in aircraft and elsewhere for controlling a fluorescent lamp load or other load includes an EMI filter, a multi-purpose transformer, a power conversion stage and a control circuitry stage. The ballast or controller operates to increase or decrease the voltage of the incoming sine wave AC voltage through a charging path for an energy storage inductor choke cooperating with an energy storage capacitor wherein the charging path for the capacitor is different from the discharge path of the capacitor to isolate the load from the charging of the capacitor and thus to provide an output to the load which is independent of the charging path and which is out of phase with the incoming waveform. This is achieved through conversion of the incoming AC power to a higher frequency and to a higher or lower voltage, under the control of a switching system, and reconversion to the input frequency, followed by filtering to remove the high frequency components. The system includes various novel feedback loops for the lamp current and the like for control of lamp current and dimming control.

US Patent:

52257410, Jul 6, 1993

Filed:

Mar 6, 1990

Appl. No.:

7/488991

Inventors:

Samuel H. Auld - Reno NV
Mangalam K. Balachander - Kent WA
Douglas W. Brooks - Carson City NV
Steven M. Jenkins - Dayton NV
Jacek J. Marcinkowski - San Pedro CA

Assignee:

Bruce Industries, Inc. - Dayton NV

International Classification:

H05B 4136

US Classification:

315307

Abstract:

A relatively high efficiency, relatively light weight, relatively small electronic ballast or AC power controller for use in aircraft and elsewhere for controlling a fluorescent lamp load or other load includes an EMI filter, a multi-purpose transformer, a power conversion stage and a control circuitry stage. The ballast or controller operates to increase or decrease the voltage of the incoming sine wave AC voltage through a charging path for an energy storage inductor choke cooperating with an energy storage capacitor wherein the charging path for the capacitor is different from the discharge path of the capacitor to isolate the load from the charging of the capacitor and thus to provide an output to the load which is independent of the charging path and which is out of phase with the incoming waveform. This is achieved through conversion of the incoming AC power to a higher frequency and to a higher or lower voltage, under the control of a switching system and reconversion to the input frequency, followed by filtering to remove the high frequency components. The system includes various novel feedback loops for the lamp current and the like for control of lamp current and dimming control.