| 摘要 |
<P>PROBLEM TO BE SOLVED: To more smoothly restart an inverter, even if a motor is rotated at a high speed during the stop of the inverter, in sensorless vector control. <P>SOLUTION: The permanent magnet motor 1 is rotated at such a high speed ω that the response of a controller does not follow before the starting of an inverter 2, it is determined whether a rotor is under high-speed rotation or under low-speed rotation, on the basis of currents Iu and Iw of the permanent magnet motor 1, a DC input current Idc of the inverter 2, or a DC input voltage Vdc of the inverter 2, even if an induction voltage Ed is higher than a DC voltage Vdc of the inverter 2. When the rotor is under high-speed rotation, the inverter 2 is restarted by controlling the starting timing of the inverter 2 or by increasing the gain of a current controller 8. <P>COPYRIGHT: (C)2011,JPO&INPIT |
