The China Induction motors suppliers tells you about the induction motor system.
According to the differential power, the speed regulation system of the induction motor can be divided into three categories:
(1) Switching power consumption speed control system
The differential power is converted into heat energy consumption in the rotor loop to increase the consumption of the differential power in exchange for the reduction of the speed. The efficiency of such systems is lower and decreases with the reduction of the speed. The structure of such systems is simple and the equipment costs are low., It still has some application value, such as voltage reduction and speed adjustment.
(2) Transfer power feed type speed regulation system
Part of the differential power is consumed, and most of them are returned to the grid or converted into mechanical energy through the conversion device. The efficiency of such systems is higher than that of the differential power consumption type. If the differential power is fed by the rotor side, The speed can be higher than the synchronous speed. Such a system can only be used for winding linear induction Motors. The application situation is subject to certain restrictions. The equipment cost is higher than the former, such as double-feed speed regulation of winding Motors.
(3) Variable power invariant speed regulation system
In this type of system, regardless of the speed level, the differential power is rotor copper loss and remains unchanged, so the efficiency is also higher, and the variable-pole logarithmic speed regulation and variable-frequency variable speed regulation belong to this category. Among them, the variable pole logarithmic speed regulation has a stage, and the application is limited. Only variable-frequency variable speed regulation is the most widely used.
