负载变化下双永磁电机转速趋近律控制的研究OA

Due to the nonlinear characteristics of the load of the dual permanent magnet motor,the degree of load varia-tion during motor start-up and shutdown is significant,resulting in severe fluctuations in motor speed and large speed errors under normal operating conditions.To this end,a cross coupling control method for the speed approaching law of dual per-manent magnet motors under load variation observation is designed.Establish a mathematical model to perform vector con-trol on the magnetic flux and torque of the dual permanent magnet motor,laying the foundation for subsequent sliding mode coordinated control.Using the load torque and rotor speed of the dual permanent magnet motor as state variables,construct the state equation of the dual permanent magnet motor,and thus build a load torque observer based on sliding mode control.Introduce sliding mode coordinated control and cross coupling control structure,design a speed sliding mode cross coupling control method,and achieve high-precision double permanent magnet motor speed sliding mode closed-loop coupling control based on convergence law.The test results show that the design method exhibits excellent and stable control performance during the start-up process and sudden load,with a consistently small speed error and feasibility and robustness.