Refrigerating apparatus and inverter device
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United States of America Patent
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N/A
Issued Date -
Sep 22, 2005
app pub date -
Dec 2, 2004
filing date -
Dec 2, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A refrigerating apparatus having a refrigerating cycle that comprises a compressor, an electric motor that drives the compressor, and an inverter device that variably controls the operating frequency of the electric motor. The inverter device includes a converter circuit that converts an A.C. voltage from an A.C. power supply into a D.C. current, an inverter circuit comprising a D.C./A.C converter, and a shunt resistance that detects a D.C. current flowing through a switching element of the inverter circuit. The shunt resistance detects a D.C. current, and the detected D.C. current value is calculated as a sine wave A.C. current for the electric motor in relation to action of the switching element.
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