| 摘要 |
PURPOSE:To perform high speed operation of an AC motor by synchronizing the operation of a speed control system with a series of start signals formed in response to a speed detection signal, and serially executing a plurality of programs in accordance with the calculating sequence, thereby eliminating the wasteful time. CONSTITUTION:An AC motor 10 is controlled by an inverter 6 to be controlled by a pulse modulation signal from a controller 100 using a microcomputer. At this time a signal synchronized with a signal for deciding the starting timing of a control system to a speed detection signal in a speed data measuring circuit 26, the number of pulses of the speed signal within the prescribed period of the signal and the time width of the prescribed periode are measured, a start signal is applied to an MPU20 at every end of the masurement, an interrupt routine of an ROM24 is executed and controlled together with the speed reference value from an RAM22. Accordingly, a plurality of programs which form the operation of the control system can be executed serially, thereby enabling to control at a high speed. |
