| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a driving device of a synchronous motor capable of controlling a power factor and a torque of the synchronous motor at high accuracy by a simple method. <P>SOLUTION: A driving device of a synchronous motor comprises: speed controlling means for, based on a deviation between an actual speed and a speed reference of the synchronous motor, calculating a torque reference of the synchronous motor; magnetic flux operating means for, based on a current flowing through an armature of the synchronous motor, a current flowing through a field of the synchronous motor and a calculated value of armature reaction inductance, calculating an internal phase difference angle of the synchronous motor; current reference operating means for, based on the torque reference and the internal phase difference angle, calculating a current reference of the armature such that a power factor of the synchronous motor becomes 1; current controlling means for controlling a current flowing through the synchronous motor such that a deviation between the current flowing through the armature and the current reference of the armature becomes zero; and parameter operating means for varying the calculated value of the armature reaction inductance used by the magnetic flux operating means for calculating the internal phase difference angle in response to a loaded condition of the synchronous motor. <P>COPYRIGHT: (C)2013,JPO&INPIT |
