Patent ID: 6844698
Filing Date: 2005-01-18
Classification: F25B,H02P

Abstract:
1. A device for controlling supply of current and static capacitance to compressors comprising: a first controlling part for controlling overall operation of a plurality of compressors, and generating a compressor turn on/off signal; a utility voltage supply for supplying a utility voltage; a switch switchable in response to the compressor driving turn on/off signal from the first controlling part for supplying or cutting off the supplying of the utility voltage to the compressors; a second controlling part for providing control signals for controlling currents and static capacitances to be supplied to main windings and supplementary windings of the compressors varied with a state of the utility voltage supply; a current controlling part for limiting a current of the utility voltage supply to the main windings of the compressors during starting of the compressors in response to the control signals, and releasing the limiting of the current to the main windings of the compressors after the starting of the compressors; and a static capacitance controlling part for supplying respective starting static capacitances and respective operative static capacitances to the supplementary windings during starting of the compressors, and supplying only the respective operative static capacitances to the supplementary windings after the starting of the compressors, in response to the control signals.