| 摘要 |
PURPOSE:To eliminate the decrease in the output of other phase even if a current control command signal of a partial phase is reduced by correcting a conduction rate signal so that deviations between the signals of all phases and motor currents become equal. CONSTITUTION:Comparison amplifiers 1, 2 input deviations between current control command signals IP1, IP2 and motor currents I1, I2, amplify, calculate a conduction rate that the deviation to the conduction rate corresponding to a command notch N is zero, and output conduction rate signals gamma1, gamma2. Adders 4, 5 add the signals gamma1, gamma2 and a correction signal gammaDELTA and output conduction rate signals gamma1DELTA, gamma2DELTA of choppers CH1, CH2. Thus, even if a current control command signal of the partial phase is reduced due to a slip, a stable operation is obtained. |
