| 摘要 |
PURPOSE:To eliminate a current detector by calculating a sinusoidal wave on the basis of an added value of a load angle based on a speed detected value and a phase detection angle, and controlling the voltage by a multiplied value of a voltage instruction value based on the speed detected value and a torque command value by a sinusoidal calculated value. CONSTITUTION:A speed regulator 10 compares a speed command value omegac with a speed detected value omegaf, and calculates a torque command value, and an arithmetic unit 11 calculates a voltage command value etc and a load angle command value omegac based on the torque command value Tc and the speed detected value omegac. An adder 12 adds the phase detected angle theta and the load angle instruction value deltac, and a sinusoidal wave calculator 13 calculates 3-phase sinusoidal signals Sa-Sc based on the added value delta0. Multipliers ea-ec multiply the signals Sa-Sc by the voltage command value etc and apply the 3-phase voltage command values ea-ec to the firing angle regulators 17-19 of an inverter 4. |
