Dimmer circuit with improved ripple control
AssigneeClipsal Intergrated Systems Pty Ltd
InventorJames Robert Vanderzon
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Abstract
A dimmer circuit arrangement is disclosed including a second control circuit for controlling the operation of a triac for delivering current to a load, and a first control circuit for controlling the operation of an IGBT power semiconductor switch for controlling the rate of rise of load voltage. The first control circuit also controls the operation of the second control circuit.
Claims24
A voltage driven timing circuit for controlling a firing angle of a switching element in a phase controlled dimmer circuit, wherein the firing angle is referenced to average mains voltage zero crossing by time-integrating mains voltage.
A method of controlling a firing angle of a phase controlled dimmer circuit, the method including referencing the firing angle to average mains voltage zero crossing by time-integrating mains voltage.
A phase controlled dimmer circuit including a voltage driven timing circuit for controlling a firing angle of a switching element in the phase controlled dimmer circuit, wherein the firing angle is referenced to average mains voltage zero crossing by time-integrating mains voltage.
Dependencies are inferred from the claim text.