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What are the three main types of brushless DC motor applications?

2019-03-04 16:11:00

What are the three main types of brushless DC motor applications? This is the relevant question we will explain to you in this issue. What is the answer to this question? Please see the following specific elaboration and summary:

1. Machinery that needs constant speed operation
General industry does not require speed regulation, and most of them use AC asynchronous or synchronous motors as power sources. 直流电机 技术的不断发展成熟,在功率不大于2kw并且连续定速运行的情况下,为了减小体积,提高效率,降低能耗和节能减排,越来越多的企业选择无刷直流电机来作为动力源,这类无刷直流电机的应用有:自动门、电梯、水泵、风机等。 With the continuous development and maturity of brushless DC motor technology, in the case of power not greater than 2kw and continuous constant speed operation, in order to reduce volume, improve efficiency, reduce energy consumption and save energy and reduce emissions, more and more companies choose Brushed DC motors are used as power sources. Applications for this type of brushless DC motors are: automatic doors, elevators, pumps, fans, etc. In machines that require high power, in addition to permanent magnet motors, drivers and external control equipment need to be added. Cost investment and return on revenue are not proportional. Therefore, brushless motors are currently rarely used.
2.Machines that need to run at a speed
The speed of this type of application equipment generally needs to be arbitrarily set and adjusted, but the control accuracy is not high. This type of system is divided into two types: one is an open-loop speed control system, and the other is a closed-loop speed control system (at this time, the speed feedback devices mostly use low-resolution pulse encoders or AC and DC speed measurement). There are three main types of motors commonly used: brushed DC motors, asynchronous motors, and brushless DC motors. It can be found everywhere in packaging machinery, food machinery, printing machinery, material handling machinery, textile machinery and transportation vehicles.
At the beginning of the application of adjustable speed system, more DC motors were used. With the development of AC speed regulation technology, especially inverters and controllers, AC frequency conversion technology has been widely used. Inverters and AC motors have penetrated into the original Most applications of DC speed control system. In recent years, due to the advantages of small size, light weight and high efficiency and energy saving of brushless DC motors, medium and small power AC frequency conversion systems are gradually being replaced by brushless DC motor speed control systems, especially in textile machinery, printing machinery, etc. The original application of frequency conversion system is more. In some application areas directly powered by batteries, DC brushless motors are now more used.
3. Machinery that requires precise control
Servo motors have always been the most important motors in high-precision control in the field of industrial automation. Different applications have different requirements for the control performance of servo motors. In practical applications, various control forms of servo motors : Torque control / current control, speed control, position control. Because of its good control performance, brushless DC motors have gradually replaced DC motors and stepper motors in high-speed and high-precision positioning systems, becoming one of the motors selected by modern servo systems. At present, brushless DC motors have begun to be used in scanners, cameras, CD drives, medical diagnostic CT, computer hard drives and CNC lathe drives.
The above is the main content of this issue, and everyone can understand it in time.

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