| 摘要 |
PURPOSE:To convert a current passage by a position detector by converting the energizing state by the edge of a pulse signal synchronized with the rotation of a rotor, and converting the sequence of the energization by a trigger signal divided in frequency by the pulse signal. CONSTITUTION:A pulse detector 10 for generating a pulse signal A synchronized with the rotation of a permanent magnet rotor 2 is provided, and its signal A is input to a counter 11. The counter 11 counts clock pulses generated from a clock pulse generator 12 in response to the signal A to obtain the counted value corresponding to the half period length of the signal A. The counted value is input to a trigger signal generator 21 to generate a trigger signal in the period of one divided by the integer number. The energized state of the first and second transister groups 4, 5 is switched by the rising and falling edges of the signal A, and the conduction of the transistor is sequentially converted by the trigger signal. |
