高压断路器直线伺服电机操动机构及其控制技术

提出一种新型高压断路器直线伺服电机操动机构，并结合永磁直线同步电机的d-q轴数学模型及推力特性，对新型操动机构的控制进行分析。设计了基于DSP的动触头位置、速度、电流的三闭环控制方案，选用高精度光栅尺作为速度、位置传感器，以满足系统实时性和高精度的要求，最终实现高压断路器分、合闸操作时对动触头运动控制、调节，使其能够按照预定理想曲线进行运动，从而有利于提高断路器开断、关合能力，改善断路器的机械电气寿命和运行可靠性。

Linear Servo Motor Operating Mechanism and Control Technique for High-voltage Circuit Breaker

The linear servo motor mechanism for high-voltage circuit breaker is presented and the control to new operating mechanism is analyzed according to the d-q axis mathematics model and the thrust characteristics of the permanent magnetic synchronous motor. The three closed-loop control schemes of location, speed and current for moving contact control is designed and executed on DSP. The High accuracy grating is chosen as the speed and location sensors by which the requirement for real-time and high accuracy in the system can be fulfilled. The control and regulation of the moving contact movement during opening and closing of the high-voltage circuit breaker are realized which make the movement curve the same as the ideal one. The opening and closing abilities and running reliability of circuit breaker are enhanced and the mechanical and electrical lifespan is improved.