| 摘要 |
PURPOSE:To smooth rotation and avoid the generation of abnormal noise, by detecting the scale of exciting current on motor coils, and by feedback- controlling the exciting current to be constant with this output. CONSTITUTION:The input of the output signal of three Hall elements contained in a Hall motor 1 to a commutation logical-circuit 5 via respective linear amplifiers 2-3 is provided. Each phase coil excitation controlling signal output from the commutation logical-circuit 5 is fed as exciting current to each phase coil of the motor 1 via multiplier circuits 6-8 and output amplifiers 9-11. By a current detecting circuit 13, based on the voltage drop of a current detecting resistor 12, coil exciting current is detected, and according to the detected current, the input level of the output amplifiers 9-11 is feedback- controlled. |
