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1. (WO2017181055) MICROCONTROLLER ARCHITECTURE FOR POWER FACTOR CORRECTION CONVERTER

Pub. No.:    WO/2017/181055    International Application No.:    PCT/US2017/027691
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
Applicants: EMERSON CLIMATE TECHNOLOGIES, INC.
Inventors: GREEN, Charles E.
MARCINKIEWICZ, Joseph G.
Title: MICROCONTROLLER ARCHITECTURE FOR POWER FACTOR CORRECTION CONVERTER
Abstract:
A circuit for driving a motor of a compressor includes a microcontroller, which includes an op- amp, a comparator, a first serial interface, and a first dedicated pin. The op-amp amplifies a value indicating current in a power factor correction converter, which includes a power switch. The comparator asserts a comparison signal in response to the amplified value exceeding a reference value. The comparison signal is output on the first dedicated pin. A programmable logic device (PLD) includes a second serial interface in communication with the first serial interface and a second dedicated pin. The comparison signal is received on the second dedicated pin and the PLD receives control messages from the microcontroller via the second serial interface. The PLD sets a value in an off-time register based on a control message from the microcontroller. The PLD controls the power switch according to the comparison signal and the off-time register.