Method of controlling start of compressor in refrigerating cycle

摘要

In a method of controlling start of a refrigerant-circulating compressor driven by a brushless motor in a refrigerating cycle, the brushless motor at halt is started in accordance with asynchronous forced commutation operation without use of rotor position detection signals; and when the rotor position detection signals can be detected predetermined times or more due to synchronous commutations during the forced commutation operation, the asynchronous forced commutation operation is shifted to synchronous commutation starting operation with the use of the rotor position detection signals.