Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate
2006-03-28
2006-03-28
Vu, David (Department: 2828)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
C315S287000, C315SDIG002
Reexamination Certificate
active
07019469
ABSTRACT:
An input line filter separates an ac sinusoidal power source from a power switching stage having a series switching section and a clamp switching section. Both the series switching section and a clamp switching section include complementary pairs of high power and high speed MOSFETs. The series switching section is connected in series between the input line filter and the inductor of an output load filter between the power switching stage and a load. The clamp switching section is connected to shunt the inductor and load. Synchronous operation is achieved by alternately operating the series and clamp switching sections to conductive conditions at a high pulse width modulation frequency. The duty cycle is selected to provide a sinusoidal output waveform with a desired amplitude. A microprocessor based programmable controller provides control signals for alternate conduction of the series and clamp switching sections. A dead time interval stored in memory in the controller separates the control signals for reliable and efficient operation. The dead time interval may be constant, or may be varied in accordance with load power variations.
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Freescale Semiconductor Inc. (Motorola) ; Hybrid flash solution; date unknown; prior to present invention.
Freescale Semiconductor Inc. (Motorola) ; 56F803 Evaluation Module Hartdware User's Manual, Rev. 4; Jun. 3, 2003.
Rasmussen Eric G.
Suomi Eric W.
Thurk John P.
Electronic Theatre Controls, Inc.
Greer Burns & Crain Ltd.
Kolehmainen Philip M.
Vu David
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