Electricity: motive power systems – Synchronous motor systems – Synchronization systems
Patent
1997-10-24
1999-09-28
Salata, Jonathan
Electricity: motive power systems
Synchronous motor systems
Synchronization systems
318812, 622284, H02P 146
Patent
active
059594284
ABSTRACT:
Without consuming excessive energy, the invented control unit of refrigerating machine can pour out an accurate amount of refrigerant resting inside the lubricant in short time in order to prevent its foaming. A refrigerating machine provided with inverter-driven compressor comprises current detection circuit that detects current being supplied to drive the compressor and a control circuit that controls the compressor based on a detection result from the current detection circuit. The invented control unit for refrigerating machine is characterized in that the control circuit which applies fixed frequency and fixed voltage to the compressor on start-up. An operation of the compressor is valuated using detection result from the current detection circuit, and based on the result from the current detection circuit, operating frequency of the compressor is controlled.
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Hori Keitaro
Ishida Haruhiko
Saito Katuhiko
Totsuka Hidekazu
Mitsubishi Denki & Kabushiki Kaisha
Salata Jonathan
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