Is the permanent magnet synchronous linear motor AC motor or direct current motor?
Permanent magnet synchronous linear motor is AC motor, because no matter as a motor or generator stator winding, it is current in the AC, and its rotor (oscillator) with a permanent magnet, need no winding current.1. "permanent magnet" refers to the rotor of the motor (to the rotating motor) or to the mover (on the linear motor), there is a permanent magnet material.2. "synchronization" means that the speed of the motor (the rotating motor) or the speed of movement (for the linear motor) and the armature winding current through the current can maintain a strict proportion relationship. The frequency of direct current is 0, so you can judge immediately that it belongs to an AC motor when you see the word "synchronous" in the name of the motor!3. "straight line" refers to the motor part of the movement is done in a straight line movement, and the traditional motor rotor "spin" movement distinction.
Brushless DC motor usually adopts the whole pitch concentrated winding to generate trapezoidal wave back electromotive force. The permanent magnet synchronous motor to generate sinusoidal EMF, need to use short distance or full pitch winding, or distribution of the fractional slot winding chute.
Permanent magnet synchronous motor (PMSM) is usually referred to as brushless DC motor with back electromotive force, trapezoidal wave and armature current as square wave. The back electromotive force and armature current are both sine waves, which are called permanent magnet synchronous motors.
Permanent magnet motor, usually small DC motor, and AC motor, generally do not have a small DC, and the excitation is also line excitation. It is not permanent. Like some razor blades, small motor are DC permanent magnet motor, DC output of some permanent magnet generator, also, some of the generator output is DC, but that is all in the generator output through DC, DC output is not directly.
