| 摘要 |
PURPOSE: To provide the vector control system of a motor which facilitates the high precision control with a small memory capacity. CONSTITUTION: A sine waveform table 31 outputs an address DAT corresponding to the upper digits of an electrical angle θwhich is detected by a pole position calculating unit 4 and trigonometric function values SINA and SINB corresponding to addresses adjacent to the address DAT. An interpolation processing unit 32 corrects the trigonometric function values SINA and SINB which are outputted from the sine waveform table 31 by using an interpolation coefficient DLT corresponding to the lower digits of the electrical angle θ which is detected by a pole position calculating unit 4. |
