What is BLDC Motor in Washing Machines?

BLDC = BrushLess Direct Current

The BLDC motor is a form of brushless motor adopted in high-end appliances to replace conventional brush motors. Because BLDC motors are brushless they operate without many of the limitations of conventional motors. Their main difference lies in the way of switching the polarity of the coils since the latter are directly connected to the poles of the current, while in BLDC motors the switching of the polarity of the current is done by an electronic ESC manager called Electronic Speed Controller.

What are the advantages of BLDC motor technology?

  • Less wear and tear! Since the motor is brushless, there are no contact points and friction so they don't wear out!
  • High speed! Brushless motors have much lower friction than conventional motors, so they can run at higher speeds.
  • High performance! Compared to conventional motors, BLDCs have a much more efficient operation consuming less energy.
  • Lower generated noise due to the lack of friction from the brushes.
  • Reduction of power consumption and noise up to -25% compared to conventional brush motors.

Washing machines with BLDC technology:

This technology finds many applications making our lives easier. One of these applications is also in washing machines, improving their performance and reducing their noise.

What are the reasons why it is worth buying a washing machine with a BLDC motor?

  1. Longer lifespan! Since the BLDC motor has minimal wear as it has no brushes, it also has a greater expectation of problem-free operation. Washing machines with BLDC motors are usually guaranteed for 10 years or more on the motor.
  2. Saving energy and therefore money! Since the BLDC motor consumes up to -25% less energy to run, you will automatically see your electricity bill go down as well.
  3. Silent mode! With the BLDC motor you can start your washing machine in quiet hours or even if it is next to your bedroom. Washing machines with BLDC motors produce up to -25% less noise during the spinning process than those of a conventional brush motor.

From WIKIPEDIA, the free encyclopedia...

A brushless direct current (BLDC) motor, also known as an electronically controlled motor, is a synchronous motor that uses a direct current (DC) power supply. It uses an electronic controller to transfer DC currents to the motor windings which produce magnetic fields that rotate effectively in space and which the permanent magnet rotor follows. The controller adjusts the phase and amplitude of the DC pulses to control the speed and torque of the motor. This control system is an alternative to the mechanical commutator (brushes) used in many conventional electric motors.

The construction of a brushless motor system is usually similar to a permanent magnet synchronous motor (PMSM), but it can also be a commutated reluctance motor or an induction (asynchronous) motor. They can also use neodymium magnets and be superposed (the stator is surrounded by the rotor), inducted (the rotor is surrounded by the stator), or axial (the rotor and stator are planar and parallel).

The advantages of a brushless motor over brushed motors are high power-to-weight ratio, high speed, almost instantaneous control of speed (rpm) and torque, high efficiency and low maintenance. Brushless motors find applications in places like computer peripherals (disk drives, printers), hand power tools, and vehicles ranging from model airplanes to cars. In modern washing machines, brushless DC motors have made it possible to replace rubber belts and gearboxes with a direct drive design.