| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inverter controller for driving a motor which satisfies even the harmonic regulation of a power supply current while being achieved in the reduction of a size, weight and cost. <P>SOLUTION: The inverter controller for driving a motor is equipped with a rectifying circuit 7 which is constituted of an extremely small capacity reactor 11 connected to a diode bridge 7a and its AC input side or the DC output side, an inverter 2, and an extremely small capacity capacitor 12 connected between the bus lines of the inverter 2. The control unit 6 for controlling the motor 3 and the inverter 2 is provided with a phase current converting section 20 which reproduces the current value of each phase of the motor 3 based on the bus line current of the inverter 2 when the voltage value to applied to the inverter 2 exceeds a setting value and with a PWM signal generating part 9 which generates the PWM signal to control the inverter 2 from the current value of each phase obtained by the phase current converting section 20 and the voltage value to be applied to the inverter 2. The inverter controller though reduced in size, weight and cost, can control the motor phase current correctly without incorrect recognition. <P>COPYRIGHT: (C)2008,JPO&INPIT |
