| 摘要 |
<p>A phase locked driving type motor is reliably started and stably rotated. A motor driving device is provided with a stepper motor constituted at least of a bipolar stator, a rotor with a bipolar permanent magnet, and a driving coil magnetically coupled to the stator, a driving pulse generating means which outputs a driving pulse signal for driving the stepper motor, a driving circuit which supplies a driving current to the driving coil according to the signal from the driving pulse generating means, a voltage detecting circuit which detects the back electromotive voltage generated by the rotation of the rotor, and a magnetic pole position detecting means which detects the position of the magnetic pole of the rotating rotor with respect to the stator based on the detection signal of the voltage detecting circuit. The driving pulse generating means controls the outputting timing of the driving pulse signal based on the detection signal of the pole position detecting means used. The magnetic pole position detecting means stops the output of the driving pulse signal based on the signal detected by means of the voltage detecting circuit while the driving pulse signal is outputted and, at the same time, causes a driving pulse signal whose phase is opposite to that of the driving pulse signal to be outputted. The phase locked driving type motor is started reliably, accelerated quicky, and rotated stably. A higher-performance motor driving circuit can be realized by combining embodiments. Moreover, high-speed high-torque rotation of the motor is realized with a simple system constitution without changing the structure of a conventional flat type bipolar motor.</p> |
