According to the structure and working principle of the motor, the motor can be divided into brush motor, brushless motor rotor and outer rotor brushless motor.
has brush motor: we also known as the dc motor or carbon brush motor, is the oldest type of motor, is currently the largest number of motor type. Machine is working, and coil and the commutator rotating, magnetic steel and carbon brush don't turn, is the direction of the coil current changes with the motor rotation phase switcher and brush. This kind of motor has a relatively low cost, high torque, simple structure, easy maintenance, etc. But due to the structure limit, so obvious shortcomings: 1, mechanical commutation sparks cause commutator and brush friction, electromagnetic interference, big noise and short life. 2, complicated structure, poor reliability, fault, requires constant maintenance. 3, because commutator, limiting the rotor moment of inertia of fall further, affect the dynamic performance. So in mould industry is mainly applied to the slower and is not sensitive to vibrations models, ship model, model aircraft motor is rarely used.
brushless motor: this is the mold side besides a brush motor use most in a motor, brushless dc motor without the use of mechanical brush device, using square wave self-control type permanent magnet synchronous motor, with hall sensor to replace carbon brush and commutator rotor in ndfeb permanent magnet materials, the performance has a great advantage compared with the general traditional dc motor. With high efficiency and low energy consumption, low noise, long life, high reliability, can be the advantages of frequency control of motor speed servo control, and as for the shortcomings & hellip; it…Is more expensive than a brush, poor maintenance, is widely used in model aircraft, high-speed car model and ship model.
however, a single brushless motor is not a complete set of power system, basic must pass the brushless brushless controller is electrically controlled can realize the control of continuous operation. Plain carbon brush motor rotation is winding, the brushless motor whether outside substructure or converted rotating magnet. So any motor is composed of stator and rotor.
the brushless motor stator is the part of produce a rotating magnetic field, can support the rotor rotate, mainly composed of silicon steel sheet, enameled wire, bearing, supports; Gummed ndfeb magnets, the rotor is in the role of the stator rotating magnetic field in rotating parts, mainly composed of rotor, magnet, support. In addition, the logarithm of stator and rotor poles also affects the speed and torque of the motor.
