Which Motor Is Used in Washing Machine?

Which Motor Is Used in Washing Machine?

A washing machine uses one of three motors to wash and spin clothes. These motors can be two or three-phase, but most modern washing machines do not use them. An asynchronous motor has a power of 180-360 watts.

Its revolutions per minute do not exceed 2800 during the wash cycle and 300 during the spin cycle. However, some rare cases may have up to 800-1000 revolutions per minute.

Variable Speed Motors

Variable Speed Motors

Variable speed motors in washing machines are electronic commutation devices that allow the washer to wash clothes at different speeds. The washing machine spins the agitator and the basket at high speeds.

A mode shifter manages different wash cycle modes, which are implemented using the rotor and the agitator drive shaft. The rotator drives the basket and agitator by oscillating at various rates.

The ECM’s rotational speed is four and sixteen times the agitator drive shaft 270. The ratio between the two components is approximately 12 to eight. This higher ratio reduces the transmission efficiency of torque ripple vibrations into the machine while ensuring that the wash cycle runs smoothly.

A washing machine with a variable speed motor saves water and energy. Water is only required to fill the drum at half the capacity of a conventional model, while a horizontal axis saves water energy.

Brushless DC Motors

Brushless DC Motors

There are several different types of brushless DC motors. Those with brushes connect the DC power supply to the armature and commutator rings, and those without brushes. Brushless motors generally consist of a single rotor and one or more stationary coils.

The armature contains the permanent magnet, while the commutator rings and stator form the centre of the motor. Brushless DC motors in washing machines can drive water to the wash and spin the clothes.

While synchronous and brushless DC motors differ in their use, they all share a few features. They both rotate synchronously to the current supplied to them.

Brushless DC motors are more efficient, as their speed is adjustable via reduction gears. And, of course, they’re more reliable! As with any motor, there are advantages and disadvantages with each type. 

Asynchronous Motors

Asynchronous Motors

The circuits of washing machines typically use asynchronous electric motors. The motor consists of a stator (a kind of magnetic circuit, a supporting structure) and a rotor (a moving part). They work due to the interaction of alternating magnetic fields.

Asynchronous motors are divided into two main types, two-phase and rare. These motors are typically used in cheaper washing machines, requiring no starting capacitor. Asynchronous motors must be wired according to the wiring diagram provided with the machine.

The motor starting winding (also called the excitation winding) produces a magnetic field. A switch (known as the SB) controls the direction of the motor. In reverse and forward cycles, the opposite is true.

In addition, a security device is used to prevent excessive vibrations and movements during operation. Asynchronous motors have three common parts.

Universal Motors

Universal Motors

The washing machine is often famous as an AC series machine, and a universal motor is useful in this appliance. Both are similar to DC motors but are modified to run on AC power.

The advantages of using universal motors in washing machines include their compact size, low noise levels, and ability to operate at high speeds. Also, they are lightweight and easy to replace.

Therefore, these are the best choice for household appliances. They are also ideal for washing clothes in high temperatures.

Although a universal motor uses a DC supply, its nominal voltage is less than 50V. Because it is lightweight and fast-spinning, universal motors are often useful in low-weight and high-speed appliances.

Portable power tools also use universal motors for their lightweight and high-speed operation. A pure DC generator powers classic engine-driven welding machines, and an auxiliary power receptacle is a standard household configuration.

While DC power is perfectly fine for job-site lighting and universal motors in drills, the AC voltage is not ideal for these applications.

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  • Post last modified:July 7, 2022


Nishant Rajput is the CEO and the head author at top10productsindia.in. He recently returned from Melbourne, Australia, after studies. Nishant is an engineer and carries colossal enthusiasm for guiding the Indian public to invest money in the right products. He hires a paid team of experts for analyzing data and narrating comprehensive reviews & guides! Besides that, he's a martial artist, gym freak, guitarist, and singer.

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