As a kind of purification equipment, FFU has been widely used in various purification projects. It can bring ideal cleaning effect for purification room. At present, the FFU in the purification room generally uses single-phase multi-speed AC motor, three-phase multi-speed AC motor and DC motor; the supply voltage of the motor is about 110V, 220V, 270V, 380V.
Compared with DC motor, AC motor has a series of advantages, such as simple structure, small size, convenient manufacture, reliable operation, low price and so on. Because it does not have commutation problem, its service life is far longer than DC motor.
In the FFU AC control mode of the purification house, it is mainly divided into voltage regulation mode and frequency conversion control mode. The so-called voltage regulation control mode is to adjust the speed of the motor by directly changing the stator voltage of the motor. In this way, the speed control scheme is mature, the speed control system is stable, and can ensure long-term fault-free continuous operation; moreover, the operation is simple and the cost of the control system is low.
Frequency conversion control is to adjust the speed of the motor by changing the power frequency f, and adjust the input voltage of the whole motor according to a certain proportion. The frequency conversion control method has excellent performance, large speed range, high smoothness and high speed regulation efficiency.http://www.wxrfcleanroom.com/