A Variety of Washing Machine Motors

1.Single-phase capacitor running asynchronous motor (single speed)

 

1.Single-phase capacitor running asynchronous motor (single speed)

This washing machine motor is composed of two main-phase windings and a secondary-phase winding that are spatially separated by 90 degrees. The advantages are simple structure, low cost, good starting and running performance, simple control, and the disadvantages are low efficiency, poor speed regulation, and inability to meet the needs of high-end washing machines.

2.Single-phase capacitor running two-speed asynchronous motor

At present, such washing machine motors are most commonly used in drum-type washing machines. Its operating principle is the same as that of a single-speed single-phase capacitor-driven asynchronous motor. In order to match the washing and dehydration speed of the drum type washing machine, a two-speed design is adopted. It has two sets of windings with different pole numbers on the motor stator. The squirrel-cage rotor can automatically adapt to two sets of stator windings. Because this washing machine motor has many poles and low speed at low speed, considering the torque at low speed and the temperature rise and efficiency of the washing machine motor at this time, the size of the motor is relatively large. This washing machine motor has a simpler structure and a longer life, but the cost is higher than that of a single-speed single-phase capacitor-driven asynchronous motor.

3.Series excited machine

This is a kind of double-side winding off-line Washer Motors | Washing Machine Motors . The stator is a concentrated winding and the rotor is a distributed winding. A commutator and a carbon brush system are arranged on the rotor. A charcoal press on the commutator is connected to the external circuit. At the same time, the speed of such washing machine motors is generally higher and the no-load speed is higher. In order to ensure safety, the rigidity and integrity of the rotor components of the motor must be good, and strict dynamic balance must be done, otherwise the vibration and noise of the motor will be extremely large.

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.

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