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This article takes you to understand what a brushless DC motor is.

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This article takes you to understand what a brushless DC motor is.

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  • Time of issue:2020-12-28
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(Summary description)The brushless DC motor (BLDC) overcomes the congenital defects of the brushed DC motor and replaces the mechanical commutator with an electronic commutator. Therefore, the brushless DC motor not only has the characteristics of good speed regulation performance of DC motor, but also has AC The motor has the advantages of simple structure, no reversing sparks, reliable operation and easy maintenance. The essence of a brushless DC motor is a DC power input, a three-phase AC permanent magnet synchronous motor that uses an electronic inverter to convert DC to AC, and has rotor position feedback. Compared with the general traditional DC motor, it has great advantages in performance and is the most ideal speed-regulating motor today.

This article takes you to understand what a brushless DC motor is.

(Summary description)The brushless DC motor (BLDC) overcomes the congenital defects of the brushed DC motor and replaces the mechanical commutator with an electronic commutator. Therefore, the brushless DC motor not only has the characteristics of good speed regulation performance of DC motor, but also has AC The motor has the advantages of simple structure, no reversing sparks, reliable operation and easy maintenance. The essence of a brushless DC motor is a DC power input, a three-phase AC permanent magnet synchronous motor that uses an electronic inverter to convert DC to AC, and has rotor position feedback. Compared with the general traditional DC motor, it has great advantages in performance and is the most ideal speed-regulating motor today.

  • Categories:News
  • Author:
  • Origin:
  • Time of issue:2020-12-28
  • Views:0
Information

This article takes you to understand what a brushless DC motor is?

The brushless DC motor (BLDC) overcomes the congenital defects of the brushed DC motor and replaces the mechanical commutator with an electronic commutator. Therefore, the brushless DC motor not only has the characteristics of good speed regulation performance of DC motor, but also has AC The motor has the advantages of simple structure, no reversing sparks, reliable operation and easy maintenance. The essence of a brushless DC motor is a DC power input, a three-phase AC permanent magnet synchronous motor that uses an electronic inverter to convert DC to AC, and has rotor position feedback. Compared with the general traditional DC motor, it has great advantages in performance and is the most ideal speed-regulating motor today.

The brushless DC motor is mainly composed of a rotor made of permanent magnet materials, a stator with coil windings, and a position sensor (optional). It can be seen that it has a lot in common with a DC motor. The structure of the stator and the rotor are similar (the original stator becomes the rotor, and the rotor becomes the stator), and the winding connections are basically the same. However, they have an obvious difference in structure: the brushless DC motor does not have the commutator and brushes in the DC motor. Instead, it is a position sensor. In this way, the motor structure is relatively simple, which reduces the cost of manufacturing and maintenance of the motor, but the brushless DC motor cannot automatically commutate (phase), and the sacrifice is the increase in the cost of the motor controller (such as the same three-phase DC motor, there are The drive bridge of the brushed DC motor needs 4 power tubes, and the drive bridge of the brushless DC motor needs 6 power tubes).


The working principle of brushless DC motor

The stator of a brushless DC motor is a coil winding armature, and the rotor is a permanent magnet. If only a fixed DC current is applied to the motor, the motor can only generate a constant magnetic field, and the motor cannot rotate. Only the position of the motor rotor is detected in real time, and then the different phases of the motor are connected with corresponding currents according to the position of the rotor. The stator generates a rotating magnetic field with uniform changes in direction, and the motor can rotate with the magnetic field.

Brushless DC motor application field

Application field 1, office computer peripheral equipment, electronic digital consumer goods field.

This is the field where brushless DC motors are the most popular and the largest in number. For example, common printers, fax machines, photocopiers, hard disk drives, floppy disk drives, movie cameras, tape recorders, etc., in daily life, have brushless DC motors in the driving control of their spindles and auxiliary motions.

Application field two, industrial control field.

In recent years, due to the large-scale research and development of brushless DC motors and the gradual maturity of technology, the distribution range of their drive systems in industrial production has also expanded, and they have gradually become the mainstream of industrial motor development. Research and attempts to reduce production costs and improve operating efficiency have achieved significant benefits. Major manufacturers also provide different types of motors to meet the needs of different drive systems. At this stage, brushless DC motors have been involved in industrial production such as textiles, metallurgy, printing, automated production lines, and CNC machine tools.

Application field three, medical equipment field.

In foreign countries, the use of brushless DC motors has become more common, which can be used to drive small blood pumps in artificial hearts; in China, high-speed centrifuges, thermal imaging cameras and infrared laser modulators for thermometers for high-speed surgical appliances Both use brushless DC motors.

Changzhou Jiayi Electric Co., Ltd. is a professional motor manufacturing enterprise integrating design,production and sales. The company's main products are include Brushless DC motor,Window air conditioner fan motor,BLDC motor for FAN-coil air conditioning,Wall mounted air-conditioning motor,Household mobile air conditioning motor,Axial flow fan,Brushless EC Centrifugal Blower Fan,BLDC Air Condition Fan,AC Snail Centrifugal Blower Fan,    Outdoor cabinet air-conditioning motor,Two-shaft air curtain motor etc."Excellence, the pursuit of excellence;integrity management, customer satisfaction" is our business philosophy,we are willing to work with you to become your most valuable supplier.You're welcome to contact us.

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