| 摘要 |
<p>PURPOSE:To subject a control rod not to be operated, by means of changing the excitation without any rotating a motor, of detecting the status of the excitation, and of finishing the on line test before the operation of a mechanical system. CONSTITUTION:Terminal circuits 4-1-4-i operate motors 11, 12 for control rod driving, and the signal corresponding to the switch operation outputs to a collating circuit 46, and the test is effected by means of transmitting this operating signal, and the test signal alternatively to the terminal circuits. The terminal circuits 46 determines the adress of the terminal circuit to be tested, and outputs the detection order of exciting status of the connected motor to the terminal circuit, and memorizes the returned excitting status. Then, all phase exciting order of a stator of a motor is outputted, thereby the exciting status is recognized, and when in normal state, the terminal circuit is returned to the initial state by means of outputting a deexciting order. When in absormal state, the test is stopped. The time thereat the torque of the motor becomes to zero by the all phase exciting and deexciting, is short, and the motor does not rotate, and the control rods do not operate.</p> |
