摘要
提出了一种新的无速度传感器测速方法,该方法是通过对转子变频调速装置主电路拓扑的电流流向进行分析,然后根据斩波器开通和闭合时刻的等效电路进行分析和建模,得到斩波电抗器两端电压与转差率之间的关系,从而间接得到电机的实际速度。该方法不受环境、机械振动等因素影响,测量快速、准确,可作为速度环的速度反馈信号。最后通过实验进行了验证,表明该无速度传感器的测速方法是可行、有效的。
A sensorless speed detection technique is presented for the rotor variable-frequency device. The current flow direction of main circuit topology is studied and the equivalent circuit is analyzed and modeled according to the chopper switching on and off times,based on which the relationship between the chopper voltage and the rotation difference rate is obtained and the actual speed of motor is indirectly achieved by measuring the chopper voltage. The proposed detection method is fast,accurate and immune to environment and mechanical vibration,and the measurement can be used as the feedback signal of speed control loop. Experiment proves its feasibility and effectiveness.
出处
《电力自动化设备》
EI
CSCD
北大核心
2010年第3期64-67,共4页
Electric Power Automation Equipment
基金
上海市重点科技攻关计划(08160510600)
上海市教委科研创新项目(10YZ162)~~
关键词
无速度传感器
转子变频
斩波
拓扑
等效电路
sensorless technique
rotor variable frequency
chopper
topology
equivalent circuit
