| 摘要 |
PURPOSE:To smoothly decelerate a rotor by controlling the phase shifting angle of the positive and negative waveform in an AC power source on the basis of a phase shifting angle control data which is stored in a memory. CONSTITUTION:A memory 4 stores a high speed rotary zone data of a motor 1, a phase shifting angle control data corresponding to the high speed rotating zone, low speed rotating zone data, phase shifting control data corresponding to the low speed rotating zone, and a speed indicating data, and the like. A control circuit 6 counts by a counter 6a the digital signal which is inputted through a position detector 3 of the motor 1 and a converter 5, compares the counted number with various data from the memory 4, and controls to drive the motor 1 through a drive circuit 7. The drive circuit 7 controls to open or close a bidirectional element on the basis of the phase shifting angle control data which is inputted from the control circuit 6 in response to the various operation modes of the motor 1, and supplies the voltage of an AC power source AC which is controlled by stationary coils L1, L2. |
