| 摘要 |
PURPOSE:To eliminate torque unevenness and perform a smooth driving with little speed error by adding offset to alternating current. CONSTITUTION:While a separate motor 1 is driven by sine and cosine waves beforehand, offsets and amplitudes of said waves are varied so that optimum offsets and amplitudes may be obtained. Thus, sine and cosine waves having offsets and amplitudes according to said optimum offsets and amplitudes are housed in memories 22, 23. Also, sine and cosine waves for forward and reverse rotations are housed in memories 22, 23 according to a direction of rotation and selected by said direction of rotation r. When the direction of rotation r and target speed vC are given, sine and cosine waves set at the optimum offsets and amplitudes are outputted from the memories 22, 23. |
