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A Variety of Washing Machine Motors II

Update:13-02-2020
Summary:

DC Permanent Magnet Brushless Motor This Washing Machin […]

DC Permanent Magnet Brushless Motor

This Washing Machine Motor is mainly composed of three parts: motor body, position sensor and electronic switch circuit. The structure of the motor body is similar to that of a permanent magnet synchronous motor. The rotor is made of permanent magnets, but does not require any auxiliary starting devices. The stator winding is generally made of three phases, and some are made of more phases, such as four phases and five phases. However, as the number of phases increases, the complexity, cost and control difficulty of the electronic switch circuit increase. According to the structure of the motor body, there are general type and disc type, inner rotor type and outer rotor type. When there is no special requirement for the diameter of the motor, DC permanent magnet brushless Washing Machine Motors are generally designed as discs, which can increase the output torque of the motor when the same volume is used. At the same time, it has a large stator diameter and can arrange more poles in order to obtain the most suitable fixed rotor poles. Larger winding layout space is also available to coordinate motor performance.

Switched Magnetic Group Motor

This Washing Machine Motor is also composed of three parts, including the motor body, power converter, and controller and position sensor. The motor body is a motor with double salient pole fixed rotor and different number of fixed rotor poles. The rotor has no excitation and no windings, and the stator is provided with a medium-sized winding set. Because the rotor is entirely made of silicon steel sheets, it is very rigid and can withstand extremely high speeds. The speed of the switched magnetic motor of some applications has reached 50,000 rpm. After the power converter is connected to a certain phase of the motor stator, the rotor of the motor is subjected to the magnetic field formed by the stator windings, and the rotor pole closest to the stator pole on the rotor will rotate toward the stator pole. At the appropriate time, the stator windings of the next phase are indirectly connected, and the windings of the previous phase are disconnected at the same time, and the rotor will continuously rotate in this direction.