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1. (WO2017181071) SWITCH ACTUATION MEASUREMENT CIRCUIT FOR VOLTAGE CONVERTER

Pub. No.:    WO/2017/181071    International Application No.:    PCT/US2017/027710
Publication Date: Fri Oct 20 01:59:59 CEST 2017 International Filing Date: Sat Apr 15 01:59:59 CEST 2017
IPC: H02M 1/42
H02P 27/08
F04B 49/03
H02M 1/00
Applicants: EMERSON CLIMATE TECHNOLOGIES, INC.
Inventors: GREEN, Charles E.
MARCINKIEWICZ, Joseph G.
BOCKHORST, Kraig
Title: SWITCH ACTUATION MEASUREMENT CIRCUIT FOR VOLTAGE CONVERTER
Abstract:
A drive includes an inverter power circuit that applies power to an electric motor of a compressor from a direct current (DC) voltage bus. A power factor correction (PFC) circuit outputs power to the DC voltage bus based on input alternating current (AC) power. The PFC circuit includes: (i) a switch having a first terminal, a second terminal, and a control terminal; (ii) a driver that switches the switch between open and closed states based on a control signal; (iii) an inductor that charges and discharges based on switching of the switch; and (iv) a circuit that outputs a signal indicating whether the switch is in the open state or the closed state based on a voltage across the first and second terminals of the switch.