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1. (WO2018131116) OUTDOOR UNIT CONTROL DEVICE

Pub. No.:    WO/2018/131116    International Application No.:    PCT/JP2017/000812
Publication Date: Fri Jul 20 01:59:59 CEST 2018 International Filing Date: Fri Jan 13 00:59:59 CET 2017
IPC: H02P 27/06
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: KAI, Akihiro
甲斐 昭裕
Title: OUTDOOR UNIT CONTROL DEVICE
Abstract:
An outdoor unit control device 13 is characterized by being provided with: an inverter circuit 54 having a plurality of switching elements and converting a DC power to an AC power to supply the AC power to a compressor 7; a current/voltage conversion circuit 23 detecting DC current supplied to the inverter circuit 54; an overcurrent comparison circuit 24 comparing the voltage level corresponding to the value of the DC current detected by the current/voltage conversion circuit 23 with a reference voltage and, when the voltage level is greater than or equal to the reference voltage, stopping the operation of the inverter circuit 54; and a protection information setting unit 38. The outdoor unit control device 13 is also characterized in that, when the compressor 7 stops due to overcurrent, an inverter circuit drive microcomputer 20 repeats to correct an overcurrent interruption voltage value if the shell temperature of the compressor when the compressor 7 stops is within the non-demagnetization region of demagnetization protection characteristics.