Three-phase synchronous motor and three-phase asynchronous motor has what difference?
Synchronous motor is called, the armature winding magnetic rotational speed and rotor rotates in the same direction, speed and in the same. This motor is generally the following structure: a winding rotor excitation winding, is centralized; the rotor withoutwinding, and the permanent magnet rotor winding structure; no, no permanent magnet, a tooth and slot. A distributed winding stator. The structure is mainly the number of slip ring and brush to a minimum, so that the motor is also called therotating field machine. There is also some special requirements, and the structure ofthe excitation windings on the stator, the structure is generally referred to as arotating armature (such as ceiling fans).
Asynchronous motor and synchronous motor is the difference between a great workon the principle of:
Synchronous motor work by "magnetic field along the magnetic circuit is always the shortest direction", the transition loss of motor for example. The excitation on the rotor, N and S appeared; and then the stator magnetic field rotation, the N, S pole ofeach change, always with the magnetic pole of the rotor one one corresponding. So the formation of a synchronous. More importantly, the number of poles, the rotor must be the same, otherwise the motor is not running.
The asynchronous motor is by induction to achieve motion. The principle is, in thethree-phase voltage in the stator winding, will form a rotating magnetic field, the rotorconducting bar for cutting magnetic lines of force, so the potential; and the guide baris connected, it had a current. At this time, we will think of junior high school -"conductor in a magnetic field will produce movement". Therefore, the motor is "suchinduction motor". For asynchronous induction motor rotor or speaking, the number of poles is automatic induction stator pole number. Can say, the rotor is not the number of poles. (the above is to do with the armature winding in the stator). Asynchronousmotor without pivoting / transition said.