Fluorescent lamp controllers
First Claim
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1. A controller for a lamp load comprising:
- a DC to AC converter having an AC output for connection to the load anda preconditioner circuit including a switched mode power supply with an output connected to supply DC voltage to the DC to AC converter and means which synchronizethe DC to AC converter and the switched mode power supply to operate at the same frequency.
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Abstract
An electronic controller for fluorescent lamps includes a DC to AC converter which supplies high frequency current to the lamps and a preconditioner stage which includes a switched mode power supply connected to accept line power and produce a DC input for the DC to AC converter. The switched mode power supply and the DC to AC converter are synchronized to operate in a fixed phase relationship and/or at the same frequency.
60 Citations
4 Claims
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1. A controller for a lamp load comprising:
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a DC to AC converter having an AC output for connection to the load and a preconditioner circuit including a switched mode power supply with an output connected to supply DC voltage to the DC to AC converter and means which synchronize the DC to AC converter and the switched mode power supply to operate at the same frequency. - View Dependent Claims (2, 3, 4)
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Specification