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1. (WO2017181091) CHOKE AND EMI FILTER CIRCUITS FOR POWER FACTOR CORRECTION CIRCUITS

Pub. No.:    WO/2017/181091    International Application No.:    PCT/US2017/027738
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
H02M 1/44
H02P 27/08
F04B 49/03
Applicants: EMERSON CLIMATE TECHNOLOGIES, INC.
Inventors: MARCINKIEWICZ, Joseph G.
BOCKHORST, Kraig
Title: CHOKE AND EMI FILTER CIRCUITS FOR POWER FACTOR CORRECTION CIRCUITS
Abstract:
A converter circuit is provided and includes: a first EMI filter connected to AC lines and includes one or more across-the-line capacitors; a charging circuit that receives power from the first EMI filter and limits an amount of current passing from the first EMI filter to a DC bus; and a PFC circuit of a compressor drive that provides PFC between an output of the charging circuit and a generated first DC voltage. The PFC circuit includes: a rectification circuit that rectifies the power from the AC lines or a charging circuit output; and a second EMI filter connected downstream from the rectification circuit and including a DC bus rated capacitor. The second EMI filter outputs a filtered DC signal based on a rectification circuit output. The PFC circuit, based on the second EMI filter output, outputs the first DC voltage to the DC bus to power the compressor drive.