Roots blower frequency conversion control method guide

Roots blower frequency control method, in order to adapt to different conditions of aeration, the use of frequency conversion motor also saves the cost of power consumption in the work! It’s a better design. As the synchronous speed is proportional to the power frequency, as long as the power frequency can be continuously changed, the stepless speed regulation can be realized. Variable frequency speed regulation will not artificially increase the slip. This method is called the foundation and auxiliary of modern AC speed regulation. It is an ideal and promising speed control method for three leaf roots blower.

Roots blower inverter can be divided into two types: AC → DC → AC inverter and AC → AC inverter. The former is also called indirect inverter with DC circuit, and the latter is also called direct inverter. In short, the way of changing the speed of the motor by changing the frequency of the input power of the asynchronous motor of Roots blower becomes variable frequency regulation. The frequency conversion and speed regulation devices often used in Roots blower mainly include three voltage types of variable direct conversion type, current type and pulse width modulation type.

The advantages of frequency control of Roots blower are high efficiency, no additional slip in frequency regulation, wide speed range, generally up to 20:1, hard characteristics, high speed accuracy and easy to realize stepless speed regulation. Since most inverters can realize energy feedback, the start-up is equivalent to the hierarchical start-up, so the energy consumption of starting and braking is very small. When the old equipment is rebuilt, it is particularly advantageous to reduce the initial investment because the original cage motor can be used. According to different load requirements, different coordinated control modes can be given for variable frequency speed regulation of three blade roots blower. It is especially suitable for adjusting deep operation or frequent starting, such as roots blower controlled by switch. At this time, the power of the selection housing is faster than that of the motor, and the energy-saving operation is performed.

For the working principle of the variable frequency motor, the user can simply introduce the Hz of the motor through the frequency conversion cabinet, and the speed of the motor will be reduced. The advantage of variable frequency motor is that the torque generated by the motor will not change after the motor speed is reduced. Its power has not changed. The power of frequency conversion has been reduced, which plays a role in saving points. In general, high-power users will use more frequency conversion, while users of low-power motors will use less frequency conversion.