Design, Optimization, and Intelligent Control of Permanent-Magnet Contactor

Abstract

This paper presents the design method of a permanent-magnet (PM) actuator and an intelligent control module for the associated PM contactor. The original design parameters of the PM actuator are obtained using magnetic circuit method. The optimization model for the PM actuator is solved by genetic algorithm and simulated annealing algorithm. A monostable cylindrical 140-A PM contactor is designed, and the corresponding intelligent control module of the actuator is developed. A dedicated control technique based on voltage feedback is proposed to realize the intelligent dynamic adjustment of the making process for the PM contactor. The electromagnetic force calculation model, the dynamic making model of the iron core and contact, the buffering model for the iron core, and the contact bounce model are all built using MATLAB. Experimental results are reported to showcase the correctness of the simulation method and the effectiveness of the feedback control technique to decrease the closing velocities of both the movable contact and the moving iron core that, in turn, will reduce the first and the second contact bounces significantly to lengthen the life span of the device.

Parameter Estimation in Linear Electromagnetic Devices

“…2. The governing electrical equation can be written as (1) with the flux linkage Ψ expressed in terms of the inductance L as (2).…”

“…1) is a single or two-phase variable reluctance electromechanical converter with a limited linear motion [1][2][3][4][5][6][7][8][9][10]. Typical fields of its application include switching (contactor) [1][2][3][4], [10] and flow controlling purposes [5][6][7][8][9] in industrial and in embedded applications. For improving the performance and cost effectiveness of the systems which utilize solenoid actuators, the sensorless principle has been widely applied and intensely researched to estimate e.g.…”

Analysis, Design and Dynamic Simulation of Novel Limited Swing Angle Torque Permanent Magnet Motor for High Voltage Circuit Breaker Application

“…Machine 2 represents the less-slots structure of a limited angle permanent magnet brushless DC servo motor actuator, and Machine 3 represents the proposed LSATPMM. 20 20 In [33][34][35][36], different permanent magnetic actuators were presented to improve efficiency, reliability and other performance factors. Ref [5,6,37,38] used the monostable and bistable Thomson-coil actuator (TCA) to increase the rapidity, reduce the complexity and improve the reliability of a high-voltage circuit breaker.…”

A New Run-to-Run Approach for Reducing Contact Bounce in Electromagnetic Switches

“…Although this early approach was clearly rigid and non selfadaptive to changing conditions, it inspired several subsequent works. For instance, dos Santos Dias de Moraes and Perin [10] proposed a method which detects the start of the closing process and accordingly modifies the coil energization, and Lin et al [11] presented an intelligent strategy that adjusts the coil voltage to reduce the magnetic force just before the impact. Other works have adopted a more control-oriented approach.…”

“…In spite of the extensive literature on the field, the problem of contact bounce in electromagnetic switches is still not successfully solved. The already presented strategies use expert rules [10], intelligent algorithms [11] or nonlinear parameter estimators [15], all of which are strongly dependent on having a good knowledge of the system and its parameters. Consequently, if the device is subject to wear or drift, works under changing conditions or some of the parameters have not been properly identified, the effectiveness of any of these algorithms is considerably reduced.…”