| 摘要 |
In a conventional rotation state detecting apparatus of a synchronous machine, since short-circuiting must be carried out twice or more when a rotation speed is detected, there have been problems in that it takes a time to detect a rotation state, and it takes a time to start up. A rotation state detecting apparatus of a synchronous machine according to the present invention has been made to solve the above problem, and includes a calculation unit (2a) for outputting a voltage vector command and a trigger signal and for outputting a rotation state of a synchronous machine (1) having windings of three phases or more in an idle state, a circuit unit (3) for applying voltages to the respective phases of the synchronous machine (1) on the basis of the voltage vector command, and a detection unit (4) for detecting a current of the synchronous machine (1) on the basis of the trigger signal and for outputting a value of the detected current to the calculation unit (2a), in which the calculation unit (2a) outputs a voltage vector for short-circuiting the respective phases of the synchronous machine (1) to short-circuit the respective phases of the synchronous machine (1), outputs a plurality of trigger signals on at least one occurrence of short-circuiting to obtain current values from the detection unit (4) plural times, and calculates a rotation speed and a rotation position. <IMAGE> |
