| 摘要 |
PROBLEM TO BE SOLVED: To carry out three-phase short-circuit processing at the time of a restart at a time when a permanent magnet synchronous a rotor is rotated at high speed without flowing of an overcorrect through a switching element at the time of the initial stage of a three-phase short circuit. SOLUTION: The controller for the permanent magnet synchronous motor has an inverter 2 having pairs of switching elements to the three phase of the permanent magnet synchronous motor having three phase respectively and supplying the motor 1 with AC power converted from DC power, a filter capacitor 3 being connected in parallel with a inverter 2 and filtering DC power, and a control section 11 controlling the driving of the motor 1 by on-off controlling etch switching element 20-25 of the inverter 1, and has a short-circuit transfer processing section 13, etc., transferring to a three-phase short circuit after the precedent on-off control of each switching element 20-25 is executed so as to avoid an overcorrect generated at an initial stage at a time when three- phase short circuit is conducted at the time of the revolution of the motor. |
