What are the Commonly Used Motors of Industrial Fans? What are the Differences between EC, PMSM, and BLDC Motors?

What are the commonly used motors of industrial fans?

Here are several types of commonly used fan motors:

1. Asynchronous motor: suitable for low torque, low power, and applications that do not require precise speed control, such as ventilation equipment, water pumps, etc.

2. DC motor: suitable for applications that require precise speed control and high torque, such as conveyor belts and mixers on industrial production lines.

3. Synchronous motor: suitable for applications that require precise speed control and high power output, such as generator sets and ship propellers.

4. Variable frequency motor: can achieve stepless speed regulation and has high efficiency and stability. It is suitable for applications that require precise speed control and efficient operation, such as air conditioning systems and cooling towers.

What are the differences between EC, PMSM, and BLDC motors?

EC motors, PMSM motors, and BLDC motors are all three-phase AC brushless DC motors, but they have some differences in their design, control, and operational characteristics.

1. EC motor (Electronically Commutated Motor): uses the rotor structure of a permanent magnet synchronous motor (PMSM) and a similar control strategy to an AC induction motor (ACIM). The EC motor can achieve high efficiency, low noise, and reliability and is suitable for applications that require long-term continuous operation. Additionally, the EC motor integrates various components such as a controller and encoder internally, making it intelligent and capable of self-diagnosis.

2. PMSM motor (Permanent Magnet Synchronous Motor): has magnets acting as rotor poles providing a constant magnetic field, while the stator field changes to drive rotor rotation. PMSM motors have the advantages of high efficiency, high power density, low noise level etc., widely used in home appliances, industrial automation, new energy vehicles and other fields.

3. BLDC motor (Brushless Direct Current Motor): Unlike brushed DC motors, BLDC motors use a permanent magnet material instead of brushes to achieve synchronization between rotor and stator with an external controller. BLDC motors are characterized by high efficiency, low noise level and high reliability etc., widely used in industries such as aerospace devices, medical equipment and smart home appliances.

Therefore, EC motors and PMSM motors are variations based on permanent magnet synchronous motor technology while BLDC motors are brushless direct current motors. The choice between them depends on the specific application requirements for each situation.