| 摘要 |
PROBLEM TO BE SOLVED: To reduce high frequency noise in PWM driving.SOLUTION: An electro-mechanical device comprises: magnets; coreless electromagnetic coils 100A and 100B; PWM driving circuits 120A and 120B for driving the coreless electromagnetic coils 100A and 100B; a power source for supplying power to the PWM driving circuits 120A and 120B; and common mode choke elements 130A and 130B. The common mode choke element 130A is provided, not between the power source and the PWM driving circuit 120A, between an output 120A1 of the PWM driving circuit 120A and the electromagnetic coil 100A, and the common mode choke element 130B is provided, not between the power source and the PWM driving circuit 120B, between an output 120B1 of the PWM driving circuit 120B and the electromagnetic coil 100B, respectively. |
