motor definition: refers to according to the law of electromagnetic induction motor electrical power conversion or transfer of an electromagnetic device. Motor is also commonly known as the motor)In the circuit with the letter 'M' (The old standard with a 'D')Said. Its main function is to produce drive torque, as with all electrical or mechanical power. Generator in circuit with the letter 'G'. Its main function is to use mechanical energy into electrical energy. According to the working power supply varieties division: can be divided into dc motor ac motor. According to the working power supply varieties division: can be divided into dc motor and ac motor. Dc motor according to the principle of work can be divided into: brushless dc motor and brushless dc motor. Dc motor according to the principle of work can be divided into: brushless dc motor and brushless dc motor. Ac motor also can be divided into: single phase motor and ac three-phase motor which also can be divided into: single phase motor and three-phase motor. According to the structure and working principle of the division: can be divided into dc motor, ac)Asynchronous motor, according to the structure and working principle of the division: can be divided into direct current motor, asynchronous motor, control motor divided again: stepping motor and servo motor, etc. Therefore, the linear displacement or angular displacement is proportional to the pulse number; According to the movement mode can be divided into rotary motion, such as straight line and plane motion; Asynchronous motor rotor speed is always less than synchronous speed of the rotating magnetic field. Synchronous motor rotor speed has nothing to do with the size of the load and always stay for the synchronous speed. Brushless dc motor 1. Brushless dc motor dc motor has the advantages of rapid response, large starting torque, rotating speed of from zero to rated speed can provide the rated torque performance, but the advantages of dc motor is also its drawback, because the direct current machine to produce a constant torque under rated load, the performance of the armature magnetic field maintain 90 ° with the rotor magnetic field to be constant, this is about to borrow from the carbon brush and commutator. Carbon brush and commutator motor rotation would produce sparks, carbon powder, so besides can cause damage of components, its usage is restricted. Ac motor without carbon brush and commutator, free maintenance, strong, wide application, but if you want to achieve the equivalent of dc motor according to the characteristic performance must use complex control technology to achieve. 2. Brushless dc motor of the brushless dc motor control structure is a kind of synchronous motor brushless dc motor is a synchronous motor with electronic control (Drive), control the frequency of the stator rotating magnetic field and the motor rotor speed feedback to the control center of repeated correction, in order to approach to achieve dc motor features. That is to say, brushless dc motor can be within the rated load when the load changes can still maintain a certain speed control motor rotor.
