Customized Power Tool Motor can be divided into DC motor and AC motor due to different input current. The principle is as follows: (1) DC motor —— with DC current to rotate the motor is called DC motor.Because of the different connection mode of magnetic field circuit and armature circuit, it can be divided into series motor, split motor, reexcited motor; (2) AC motor —— AC motor in the induction motor, its powerful induction current (eddy current) generated in the rotating magnetic field, the copper rod on the rotor continuously cut the magnetic line, follow the law, this induction current against the magnetic field and the rotor relative movement effect, so the rotor is rotating with the magnetic field.However, the rotor does not turn as high as the magnetic field transformation speed, otherwise the magnetic line will not be cut by the copper rod. The motor that turns by an AC current is called an AC motor.There are many kinds, mainly including: A. The rectifier motor —— makes the series DC generator used for the AC motor, that is, such a motor, because the alternating current in the magnetic field and armature circuit, turn at the same time, so the direction of the dual moment remains constant, the machine is rotating.This kind of motor is also called "general purpose motor" because it can also use both AC and DC.Vacuum cleaners, sewing machines and other household appliances often use these motors. b. The induction motor —— puts the rotor in the rotating magnetic field and rotates the rotor due to the action of vortex current.Rotational magnetic field is not caused by mechanical methods, but by alternating current through the number of log electromagnets, so that its magnetic pole properties cycle change, can be seen as a rotating magnetic field.Usually use a three-phase induction motor (with three pairs of magnetic poles).The motion of a DC motor is just opposite to that of a DC generator, in which the induced current is formed by the inductive electromotive force, so they are in the same direction.In the motor, the current is the opposite direction of the induced electric momentum supplied by the external power supply and the opposite direction of the armature current i. The c. The synchronous motor —— armature turns from one pole to the second pole, just in the same periodic motor as the incoming current steering.This motor can not be operated by itself, it must be used by another motor or special auxiliary winding to reach the appropriate frequency, it can first connect to the AC.If the load changes and makes the rotation speed changes, the rotation speed is not consistent with the AC frequency, enough to make its pace disorder, tend to stop or cause damage.Because of many restrictions, so the application is not wide.
