Brushless motor, method for operating brushless motor and method for manufacturing brushless motor

摘要

A direct PWM brushless motor has a motor main body mounted on a metal substrate and a motor drive circuit formed on a circuit substrate that is separated from the metal substrate. The motor drive circuit includes switching elements that are directly turned on and off, in which a switching pulse width for the switching elements is modulated to control current conducting through drive coils. The direct PWM brushless motor has a wiring cable connection device for connecting the motor main body and a fixed potential of the motor drive circuit, and a conduction device that conductively connects a metal plate portion of the metal substrate to the wiring cable connection device.