Phase control switch with reduced heat dissipating RFI inductor
AssigneePass & Seymour, Inc.
InventorBruce F. Macbeth
Life of this patent
Estimating the term…
Abstract
A phase control switch with an RFI suppression inductor includes a first winding on the inductor in series with a triac. A first capacitor is in parallel across the series combination of the first winding and triac. The switch further includes a second winding on the inductor with a second capacitor connected in parallel across the second winding. When the second capacitor and second winding resonate, a Q rise in flux occurs in the inductor core, intercepting the flux in the first winding to produce a greater voltage drop across the first winding and a corresponding decrease in the rate of current rise in the triac. Fewer turns are needed in the first winding for proper RFI suppression, resulting in a smaller device.
Claims14
A phase control switch, with an RFI suppression inductor, including:
- an electronic switch;
- an inductor having a first winding connected in series with the electronic switch and a second winding;
- a first capacitor connected in parallel across the electronic switch and first winding;
- and
- a second capacitor connected in parallel with the second winding.
A phase control switch comprising:
- an electronic switch connected between an ac power source and a load;
- an inductor having a first winding connected in series between an ac power source and the electronic switch and a second winding connected in series with the first winding;
- and
- a first capacitor connected in parallel across the electronic switch and the first and second windings.
Dependencies are inferred from the claim text.