| 摘要 |
PURPOSE:To control an induction motor equivalently to a DC separately-excited motor without using a speed detector by calculating a deviation between a slip angle frequency and a slip angle frequency command, and controlling so that the deviation becomes zero. CONSTITUTION:A slip angle frequency deviation calculator 16 inputs a biaxial component d<e>-axis primary current component id<e>s and q<e>-axis primary current component iq<e>s from a 3-phase/3-phase converter 5, and also inputs the d<e>-axis component V*d<e>s of the primary voltage command and q<e>-axis component V*q<e>s of the primary voltage command from calculators 13, 14, calculates a slip angle frequency deviation pDELTAomegas, a calculator 17 generates a synchronous angle frequency command omega that the slip angle frequency deviation PDELTAomegas is zero. Thus, the rotor angle frequency omegar of an induction motor can be eliminated under the control, and the rotating speed detector of the motor as a result can be eliminated. |
