来源：http://www.jnmcd.com 发布时间：2018-12-05 浏览：次
Because brushless DC motor has a series of advantages such as simple structure, reliable operation, convenient protection and so on, as well as the characteristics of high efficiency, no excitation loss and good speed regulation function of DC motor, it is in various areas of the national economy, such as medical equipment, instruments, chemical industry, textile and home. The use of electrical appliances is increasingly widespread.
The application of brushless DC motor can be divided into the following categories:
1. Speed-adjustable driving machinery
Speed needs to be set and adjusted arbitrarily, but the control accuracy is not high. This kind of system can be divided into two kinds: one is open-loop speed regulation system, the other is closed-loop speed regulation system.
There are three kinds of motors commonly used: DC brush motor, DC brushless motor and asynchronous motor. This is widely used in packaging machinery, food machinery, printing machinery, material conveying machinery, textile machinery and transportation vehicles.
In the beginning, DC motors were widely used in the application of speed control system. With the development of communication speed control skills, especially power electronics skills and controllers, communication frequency conversion skills were widely used. Inverters and communication motors penetrated into most of the original DC speed control systems.
In recent years, due to the increasingly prominent advantages of BLDCM, such as small size, light weight, high efficiency and energy saving, the medium and small power communication frequency conversion system is gradually replaced by BLDCM speed regulation system, especially in the areas of textile machinery, printing machinery and other original frequency conversion system. In some applications directly powered by batteries, brushless DC motors are now more widely used.
2. Constant Speed Driving Machinery
In the general industrial occasions, asynchronous and synchronous motors with three-phase or single-phase communication are often used. With the improvement of power electronics skills, more and more motors are being brushless straightening in order to reduce volume, save materials, improve efficiency and reduce losses when the power is less than 10 kW and running continuously. Stream motors are replaced.
This kind of application includes: active door, elevator, water pump, fan, etc. In the case of high power, brushless motors are seldom used because of the large cost and investment, besides permanent magnet motors, drivers and other devices are also needed.
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