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1. (WO2018020364) VOLTAGE LOSS PROTECTION CIRCUIT AND STARTING CABINET

Pub. No.:    WO/2018/020364    International Application No.:    PCT/IB2017/054385
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Fri Jul 21 01:59:59 CEST 2017
IPC: H02P 29/024
F25B 49/02
H01H 83/12
H02P 4/00
F04B 39/02
G05B 9/02
H02H 3/24
Applicants: JOHNSON CONTROLS AIR CONDITIONING AND REFRIGERATION (WUXI) CO., LTD.
JOHNSON CONTROLS TECHNOLOGY COMPANY
Inventors: CHEN, Shuguang
TAO, Jinghuai
PAN, Liping
Title: VOLTAGE LOSS PROTECTION CIRCUIT AND STARTING CABINET
Abstract:
The present application provides an improved voltage loss protection circuit, which includes a voltage loss coil protection circuit and an energy storage protection circuit, and a starting cabinet with the improved voltage loss protection circuit. The voltage loss protection circuit can control a first power supply according to the operation state of a second power supply. The first power supply provides power to a compressor and the second power supply provides power to an oil pump for sending lubrication oil to the compressor. When the second power supply encounters voltage loss or excessive voltage reduction, the voltage loss coil protection circuit or the energy storage protection circuit operates independently in parallel to cut off the first power supply from the compressor to prevent the compressor from running without lubrication oil.