| 摘要 |
PURPOSE:To realize a low torque-ripple and high response current control by providing a current-imbalance compensation circuit, in which a voltage command is corrected so that the current-difference signal of respective windings becomes zero, and an average-current detector circuit for operating the mean value of a specific axis component current. CONSTITUTION:When inverter apparatus 2A, 2B are connected in parallel with a multiwinding motor 3 divided into two winding groups so as to be multiple, a difference occurs in the d-q axis component current detection values Ida, Iqa, Idb, Iqb of respective windings if respective winding currents ia, ib are unequal in current strength. Then, the mean values -Id and -Iq of respective detection values Ida, and Idb and Iqa and Iqb are obtained by an average-current detector circuit 10 and inputted to current-imbalance compensation circuits 12A, 12B so that a deviation is taken. Subsequently, a signal for correcting a d-q axis component voltage command is outputted on the basis of the deviation so that the difference of the d-q axis component currents of respective windings becomes zero, the signal is added by adders 13A, 13B so that an AC voltage command signal is outputted, and inverters operate so that AC currents between respective windings coincide in the current strength. |
