| 摘要 |
PURPOSE: To reduce fine vibrations and a shake of an electric motor and a load device and to improve the follow-up performance to a speed instruction by minimizing torque ripples of the electric motor. CONSTITUTION: This system is provided with a current instruction generating circuit 14 which generates a current instruction by multiplying the waveform of a current instruction, selected according to position information by the level of the current instruction and a current controller 15 which making a current actually flowing to a motor, followed by the current instruction outputted by the current instruction generating circuit 14 by a proportional differential and integral system and generates an on/off signal for switching operation from the current instruction. Then switching elements Q1 to Q6 turn on and off with the on/off signal which is outputted from the current controller 15, and an inverter is provided which applied a specific current quantity to a three-phase coil 17 from a power unit 18, thereby minimizing the torque ripples of a brushless DC electric motor control system. |
