单相永磁低速直线电动机的自启动分析

Self-Starting Analysis of Single-Phase Permanent Magnet Low Speed Linear Motor

单相永磁低速直线电动机可直接将电能转换成低速直线运动的机械能,在工程领域具有广泛应用前景,愈来愈受到国内外研究机构的重视。采用d、q轴坐标系统,建立单相永磁低速直线电动机的电压平衡方程,推导出电磁力矩表达式。从不同启动位置对电动机自启动能力进行分析,找出影响自启动性能的制约条件和参数,并通过实例计算及仿真,计算电磁力矩随功角的变化曲线,分析电动机相关参数对电磁力矩的影响,对比验证理论分析的正确性。该方法可推广应用于一般的单相永磁式和反应式低速直线电动机。

The single-phase permanent magnet low speed linear motor （SPMLLM） converts electrical energy directly into linear motion of the low-speed mechanical energy. In the engineering field, it has broad application prospects and get more and more attention of domestic and foreign research institutions. Uses d, q-axis coordinate system, builds the establishment of a single phase permanent magnet linear motor low voltage balance equations. The electromagnetic torque expression is derived. Analyzes the self-starting capability of motor from different positions and find out the constraints and parameters that influence the self-starting performance. And finally through the example calculation and simulation, calculates the computational electromagnetics with the power angle thrust curves, analyzes the impact of the electromagnetic torque of the motor parameters, and makes the comparison to verify the theoretical analysis. The method can be extended to the general single-phase low-speed permanent magnet linear motor and reactive low speed liner motor.