摘要
在分析六脉波交交变频的基础上及根据软启动中的电压双斜坡启动原理,提出了一种基于六脉波交交变频的分频启动方法。该方法根据交交变频原理和晶闸管触发规律,在电动机启动时,直接在电动机定子侧加电动机启动所需最小转矩所对应的电压值,然后逐级增加变频输出电压值,直至最终所需电压。仿真结果表明,通过合理选择变频输出电压的大小,调节每个等级电压作用的时间,能够有效控制电动机分频启动过程中定子电流的大小,获得良好的转矩变化曲线,改善电动机启动性能。
Based on analysis of six-pulse-wave AC/AC frequency converter and according to principle of dual-slope voltage soft starting method,a frequency division starting method based on six-pulse-wave AC/AC frequency converter was put forward.When motor is starting,corresponding output voltage required the minimum torque value is exerted on stator side of motor directly and then the voltage is increased progressively to the final desired voltage based on the principle of AC/AC frequency converter and thyristor trigger rules.The simulation results show that the method can control stator current effectively and obtain good torque curve in frequency division starting process,improve starting performance of motor through selecting converter output voltage and adjusting running time of each level reasonably.
出处
《工矿自动化》
北大核心
2013年第4期72-75,共4页
Journal Of Mine Automation
基金
河南理工大学2011年研究生学位论文创新基金(2011M24)
关键词
电动机
六脉波交交变频
分频启动
电压双斜坡启动
S函数
定子电流
转矩
motor
six-pulse-wave AC/AC frequency converter
frequency division starting
dual-slope voltage starting
S-function
stator current
torque
作者简介
李高举（1986-），男，河南焦作人，硕士研究生，研究方向为电力电子与电气传动，E—mail：ligaojul23@126.com
