| SRM (Switched Reluctance Motor, referred to as the SR motor,or SRM) is a new type of electromechanical equipment, It has a simple structure, high efficiency, flexible control, high efficiency and steplessspeed control, and low cost. SRM combines a variable frequency drive system of durable, suitable for harsh environments and DC speed control system and good quality properties. experts were regarded as electrical transmission systems milestone in the process of development. SRM on the position detection is to meet precision, circuit is simple, reliable and anti-jamming ability, sometimes also requires can work in harsh environments. The SRM speed control system is always working in the self-synchronization state, the position loop using position sensor, which increased increased the system structure of the complexity and improved cost,and to give installation, commissioning inconvenience, reduce the system reliability. As sensor resolution constraints, makes the switched reluctance motor speed control system performance decline.In this paper, Based on the traditional simplified flux is propose an improved simplified flux method is proposed, in which turn-on angle can be set optionally and separate from turn-off angle.The speed and rotor position can be estimated according to the presented method. At the same time, the on-line adjustment of turn-on angle to improve efficiency is proposed.Firstly, A nonlinear simulation model of the SRM is established using Matlab/Simulink. Secondly, established the SRM double loop control system simulation model. On this basis, adding the flux loop, the current hysteresis and speed outer ring, completed the SRM speed control system without position sensor control and efficiency optimization.Simulation results show that improved simplified flux method can realize precise position control and can effectively improve the system dynamic performance and efficiency. Finally, experiment results confirmed the validity of the presented method.
|
PDF Full Text Request