Electronically commutated motor starting method for fan, involves controlling electrical energy to motor such that motor does not overcome braking portion, when motor starts in direction opposite to preferred rotation direction

摘要

The method involves controlling electrical energy of a motor that has auxiliary reluctance torque such that the motor does not overcome a braking portion, when the motor starts in a direction opposite to a preferred rotation direction. A rotor movement is monitored to determine whether a rotor (22) is rotating in the preferred direction, based on which motor is made to run or stop. An independent claim is also included for an electric motor that comprises a stator with a stator winding arrangement.