| 摘要 |
PROBLEM TO BE SOLVED: To uniformly heat equipment and a device without causing torque to be applied to a rotor and without temperature deviation.SOLUTION: A permanent magnet synchronous motor driving device is provided with heating control means causing a current to flow through a winding of each phase of a permanent magnet synchronous motor and heating equipment and a device prior to a start of rotational driving of the permanent magnet synchronous motor. The heating control means combines a current-carrying period when turning on a switching element of at least one phase out of upper arms and a switching element of at least the other one phase out of lower arms of a voltage inverter and a current-carrying period when turning on a switching element possessed by an arm making a pair with the arm having the switching element turned on in the current-carrying period and repeatedly executes a current-carrying process for causing an alternating current to flow through the winding of the permanent magnet synchronous motor while sequentially changing a current-carrying phase for all phases as objects. |
