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1. (WO2017041011) LOAD CONTROL DEVICE FOR HIGH-EFFICIENCY LOADS

Pub. No.:    WO/2017/041011    International Application No.:    PCT/US2016/050227
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sat Sep 03 01:59:59 CEST 2016
IPC: H05B 39/04
H02M 5/293
H05B 33/08
H02M 7/06
H02M 7/155
Applicants: LUTRON ELECTRONICS CO., INC.
Inventors: MACADAM, Russell, L.
PARENT, Joseph, T.
WEIGHTMAN, Russell
Title: LOAD CONTROL DEVICE FOR HIGH-EFFICIENCY LOADS
Abstract:
A load control device for controlling power delivered from an AC power source to an electrical load may comprise a thyristor, a gate current path, and a control circuit. The control circuit may be configured to control the gate current path to conduct a pulse of gate current through a gate terminal of the thyristor to render the thyristor conductive at a firing time during a half-cycle of the AC power source. The control circuit may operate in a first gate drive mode in which the control circuit renders the gate current path non-conductive after a pulse time period from the firing time. The control circuit may operate in a second gate drive mode in which the control circuit maintains the gate current path conductive after the pulse time period during the half-cycle.