Motion Control Motor—Brushless DC Motor

Modern brushless DC motor without sliding electrical contact,whose characteristics such as easy speed adjustment and good torque control performance are similar to DC motor,has become the mainstream of modern transport-controlled motor.But it is actually a self-synchronous motor,a kind of three-phase AC permanent magnet synchronous motors.Compared with the real DC motors,there are still two weaknesses.First,the motor power output is limited by the winding inductance.Second,it's hard to real-time monitor and control the armature AC current.Therefor,a new generation of BLDCM should be put forward in this paper,that is an electronic commutated motor with the ideal DC armature winding circuit.