| 摘要 |
An inverter system for driving an induction motor is disclosed. The inverter system for driving an induction motor comprises: a rectifying circuit for rectifying a three-phase AC voltage and outputting the same; a smoothing circuit for smoothing the rectified voltage and outputting the same; a controller for detecting a DC link voltage of the smoothing circuit, determining a power failure mode, a normal mode or a power restoration mode according to the detected DC link voltage and predetermined elapsed time, and outputting a voltage pulse signal according to the mode; and an inverter for converting the DC voltage outputted from the smoothing circuit into an AC voltage of variable frequency and variable voltage according to the voltage outputted from the controller and outputting the converted AC voltage in order to drive the induction motor.
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