Research on asynchronous motor vector control system based on rotor parameters time-varying

摘要

On the basis of the asynchronous motor equations in the M -T reference frame rotating at synchronous speed, the paper, in detail, analyses the affect of the rotor parameters, including reluctance and inductance, to the performance of the Flux-Observation based Vector Control. Considering the time-varying of rotor parameters along with the running state in the real experimental systems and the AC motor model included in the SimPowerSystems of Matlab can not change its own rotor parameters with time, an AC model is built, which can simulate real-time changes of its rotor parameters, making use of S-Function in MATLAB. Based on the model, a whole Vector Control simulation system is established, and for the first time, respectively it is implemented that the simulation and analysis of the system on the condition of both neglecting and considering the time-varying of rotor parameters. It is indicated that, from the simulation results, the variations of the rotor parameters resulting from the Skin Effect make the dynamic performance of AC Vector Control get worse. At the same time. A control system based on the TMS320F2812 digital signal processor produced by Texas Instruments is designed, the design of control circuit and control soft is accomplished. The paper adopts VC++ soft to compile the observation interface of Pc. The experimentation indicates the control system can implement the scheme and the control performance is fine.