Patent ID: 7084600

Claim:
A power control apparatus for a motor-equipped turbo charger, comprising: a converter which receives a direct current voltage and boosts the direct current voltage to a boosted voltage; an inverter which receives the boosted voltage, generates a waveform drive signal of an output voltage from the boosted voltage, and gives the waveform drive signal to an induction motor to drive a rotary shaft of the turbo charger, the waveform drive signal having a waveform corresponding to a rotational speed of said rotary shaft driven by said induction motor; and a controller which controls the boosted voltage of said converter and controls the output voltage of the waveform drive signal outputted from said inverter, wherein said controller comprises: a control signal generating section which generates a control signal in accordance with an increase of a target rotational speed of said rotary shaft; a frequency controller which performs a frequency control for said inverter to increase a frequency of said waveform drive signal outputted from the inverter in accordance with the control signal; an inverter voltage controller which performs an inverter boosting control for said inverter to increase the output voltage of the waveform drive signal outputted from said inverter in accordance with the control signal when the rotational speed of said rotary shaft is within a low-rotational speed region; and a converter voltage controller which performs a converter boosting control for said converter to increase the boosted voltage outputted from said converter in accordance with the control signal when the rotational speed of said rotary shaft is within a high-rotational speed region.