| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control device of a synchronous machine that can perform high-accuracy torque control, a quick torque response and maximum-efficiency operation by using an inexpensive microcomputer. <P>SOLUTION: The control device of the synchronous machine comprises: a d-axis current command operation unit 6 that obtains a d-axis current command by a direct function of an absolute value of a torque command value; a q-axis current command operation unit 7 that obtains a q-axis current command from the d-axis current command and the torque command; a high-efficiency segment operation unit 14 that obtains the segment of the direct function by inputting an absolute value of the rotational speed of the synchronous machine and outputs the segment; and a high-efficiency inclination operation unit 15 that obtains the inclination of the direct function such that the loss of the synchronous machine becomes minimum by inputting a value obtained by making the absolute value of the torque command pass a low-pass filter, a value obtained by making the q-axis current command pass the low-pass filter, and the absolute value of the rotational speed. Processings of the d-axis current command operation unit 6 and the q-axis current command operation unit 7 are executed by short cycle processing loop, and processings of the high-efficiency segment operation unit 14 and the high-efficiency inclination operation unit 15 are executed by a relatively long cycle processing loop. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
