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Inverter device for driving three-phase induction motor of injection molding machine, has carrier generation unit generating carrier frequency pattern of pulse width modulation based on set of operation conditions of machine
Inverter device for driving three-phase induction motor of injection molding machine, has carrier generation unit generating carrier frequency pattern of pulse width modulation based on set of operation conditions of machine
The device has a carrier generation unit (70) generating a carrier frequency pattern of pulse width modulation based on a set of operation conditions of a processing machine. The frequency pattern comprises a normal frequency mode and a low carrier frequency mode that are selected based on the operating conditions. A temperature detection unit (30) detects temperature information associated with temperature of a power module (20). An inner correction unit (71) corrects lower carrier frequency (f1) based on the detected temperature information.
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