| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device for control of an electric motor, capable of optimizing the variation of energy in changing the relative torque. <P>SOLUTION: The device for control of the electric motor 10 controls a current that is supplied to the electric motor 10 which includes an outer rotor 21 and an inner rotor 22, both being provided concentrically around a rotating shaft 12, and a turning mechanism 30 for changing a circumferential relative angle between the outer rotor 21 and the inner rotor 22. It includes an energy consumption controller 153 which corrects a phase advance angle of the current to be supplied to the electric motor 10. Moreover, the energy consumption controller 153 computes a pressure reducing energy W1 corresponding to a variation of a relative torque corresponding to the phase advance angle of the current before and after correction of the phase advance angle of the current, and computes an efficiency changing energy W2 according to a variation of the shaft torque corresponding to the phase advance angle of the current before and after correction of the phase advance angle of the current. Furthermore, the energy consumption controller 153 corrects the phase advance angle of the current in a range where the pressure reducing energy W1 surpasses the efficiency changing energy W2 in a direction where the relative torque corresponding to the phase advance angle of the current decreases before change of the relative phase angle. <P>COPYRIGHT: (C)2011,JPO&INPIT |
