METHOD OF CONTROLLING INVERTER-INTEGRATED ELECTRIC COMPRESSOR FOR VEHICULAR AIR CONDITIONING SYSTEM
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United States of America Patent
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Issued Date -
Aug 11, 2011
app pub date -
Jul 31, 2009
filing date -
Aug 6, 2008
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Disclosed is a method of controlling an inverter-integrated electric compressor for a vehicular air conditioning system, which prevents an over-current from being generated due to a load of an inverter for driving the electric compressor and reduces an RPM even without stopping the vehicular air conditioning system, preventing damage to the air conditioning system due to an over-current. The method of controlling an inverter-integrated electric compressor for a vehicular air conditioning system includes the steps of: (1) calculating a target RPM of a motor for driving the inverter-integrated electric compressor in a vehicular air conditioning system; (2) checking whether a current applied to the motor driven according to the target RPM exceeds a threshold value preset in the inverter; and (3) decreasing, if the current applied to the motor exceeds the threshold vale, the target RPM in the inverter to perform a feedback control of reducing the current, and rotating, if the current applied to the motor does not exceed the threshold value, the motor according to the target RPM.
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