Speed sensorless fuzzy adaptive PI direct torque control of asynchronous motor
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摘要: 文章针对传统无速度传感器直接转矩控制转速不稳定、超调量大等问题做出两点改进。首先，引入自耦PI对传统MRAS无速度传感器直接转矩控制进行改进，该方法改善无传感器直接转矩控制调速性能、降低超调量、减小稳态误差；其次，针对直接转矩控制具有转矩脉动大、调速性能差等缺点，提出变论域静态模糊自适应PI控制策略，减小转矩脉动并改善调速性能，大大提升了抗负载能力；最后，在Matlab/Simulink仿真环境下进行了仿真并进行分析，证明了上述方法的有效性和可行性。结果表明，相对于传统的无速度传感器直接转矩控制系统，仿真结果显示减小了转速超调量，缩短了转速上升中到达高速工况的响应时间，提升了抗负载能力。Abstract: In order to solve the problem of speed instability and large overshoot of speed sensorless direct torque control. Firstly, auto-coupling PI is introduced to improve the speed regulation performance of sensorless direct torque control and reduce steady-state error. Secondly, the variable universe fuzzy adaptive PI control strategy is proposed to reduce the torque ripple and improve the speed regulation performance, aiming at the shortcomings of direct torque control such as large torque ripple and poor speed regulation performance. Finally, it is simulated under Matlab/Simulink and the validity and feasibility of the above are proved. The results show that the simulation results of direct torque control system show that the speed overshoot is reduced, the response time of speed rising to high speed is shortened, and the load resistance is improved.
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表 1 $ \Delta {K_{P\omega }} $模糊规则表
$ {e_{\omega t}} $ $ e{c_{\omega t}} $ NB NM NS ZO PS PM PB NB PB PM PM PS PS ZO ZO NM PB PB PM PS PS ZO NS NS PM PM PM PS ZO NS NS ZO PM PM PS ZO NS NM NM PS PS PS ZO NS NM NM NM PM PS ZO NS NS NM NM NB PB ZO ZO NM NM NB NB NB 
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表 2 $ \Delta {K_{I\omega }} $模糊规则表
$ {e_{\omega t}} $ $ e{c_{\omega t}} $ NB NM NS ZO PS PM PB NB NB NM NM NS NS ZO ZO NM NB NB NM NS NS ZO ZO NS NB NM NM NS ZO PS PS ZO NM NM NS ZO PS PM PM PS NM NS ZO PS PM PM PB PM ZO ZO PS PS PM PB PB PB ZO ZO PS PM PM PB PB
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