Inverter for the supply of discharge lamps with heated electrodes, with resonant circuit
AssigneeMagneTek, Inc.
InventorAntonio Canova
Life of this patent
Estimating the term…
Abstract
An inverter for the supply of one or more discharge lamps with heated electrodes includes a load circuit with a series resonant circuit and at least one lamp, two controllable switches and a control circuit for the switches, causing the switches to conduct alternately. A normally isolated dissipative component is connected, when the voltage across the load circuit exceeds a given value, to the load circuit, thus modifying its figure of merit to limit the maximum voltage without varying the resonant frequency of the load circuit.
Claims16
Inverter for the supply of one or more discharge lamps with heated electrodes comprising:
- a load circuit with a series resonant circuit and at least one lamp, two controllable switches and a control circuit for said switches, causing said switches to conduct alternately, a normally isolated dissipative component, which is connected, when a voltage across the load circuit exceeds a given value, to the load circuit, thus modifying its figure of merit to limit a maximum voltage without varying a resonant frequency of the load circuit.
An inverter for a discharge lamp, the inverter comprising:
- a load circuit, said load circuit including a series resonant circuit connectable to the lamp, said load circuit also including two controllable switches and control circuit means for causing said two controllable switches to conduct alternately;
- a normally isolated dissipative component means for connecting to said load circuit only when a voltage across said load circuit exceeds a given value, said normally isolated dissipative component means modifying a figure of merit of said load circuit and limiting a maximum voltage of said load circuit while maintaining a resonant frequency of said load circuit.
Dependencies are inferred from the claim text.