Method for Fault Diagnosis and Speed Control of PMSM

In the field of fault tolerance estimation,the increasing attention in electrical motors is the fault detection and diagnosis.The tasks performed by these machines are progressively complex and the enhancements are likewise looked for in the field of fault diagnosis.It has now turned out to be essential to diagnose faults at their very inception;as unscheduled machine downtime can upset deadlines and cause heavy financial burden.In this paper,fault diagnosis and speed control of permanent magnet synchronous motor(PMSM)is proposed.Elman Neural Network(ENN)is used to diagnose the fault of permanent magnet synchronous motor.Both the fault location and fault severity are considered.In this,eccentricity fault may occur in the motor.To control the speed of the permanent magnet synchronous motor,Dolphin Swarm Optimization(DSO)algorithm is used.The proposed work is simulated by using MATLAB in terms of amplitude,speed and torque.The comparison graph of speed vs.torque obtained by the proposed method gives better result compared to the other existing techniques.The proposed work is also compared with Particle Swarm Optimization(PSO)and Elephant Herding Optimization(EHO)algorithm.The proposed usage of Elman Neural Network to detect the fault and the usage of Dolphin Swarm Optimization algorithm to control the speed of the permanent magnet synchronous motor gives better outcome.

具有绝缘监视和闭锁功能的电动机综合保护装置

从电动机综合保护性能要求出发,采用多种数字集成电路，构成综保装置。重点介绍了全集成化的新型电动机综合保护装置的组成及其工作原理。该装置具有功能强、工作稳定、动作可靠、抗干扰性强，体积小、重量轻等优点。

软启动装置在风机中的应用

随着工业化规模的不断扩大,大容量电机的应用急剧增加。而大容量电机启动时产生的大电流冲击严重影响着工业设备的正常运行和使用寿命。本文主要分析了当今工业中为解决电机启动过程中的大电流冲击问题而产生的软启动装置。简要的介绍了电动机软启动的启动方式,软启动装置的种类和组成以及特点。并结合酒钢烧结厂抽风机简要的介绍了液阻式软启动装置的原理,特点。最后分析了未来软启动的发展方向。

纺织机械用直流无刷电动机的控制算法优化设计

介绍了纺织机械用直流无刷电动机的算法改进,包括直流无刷电动机的速度与电压之间的非线性优化以及专家PID控制器设计。此设计方法是通过应用分段函数的线性优化以及专家经验设计PID控制器。结果表明,此PID控制器具有更高的稳定性和鲁棒性。