Closed-Loop Rotor Flux Estimation in Vector Controlled Induction Motor Drives Operated at Low Switching Frequencies

被引：0
|
作者：
Tripathi, Avanish [1 ]
Hari, V. S. S. Pavan Kumar [1 ]
Narayanan, G. [1 ]
机构：
[1] Indian Inst Sci, Dept Elect Engn, Bangalore 560012, Karnataka, India
来源：
2016 IEEE INTERNATIONAL CONFERENCE ON POWER ELECTRONICS, DRIVES AND ENERGY SYSTEMS (PEDES) | 2016年
关键词：
Induction motor drive; inverter delay; pulse-width modulation; rotor flux estimation; synchronous reference frame; vector control; DIRECT-TORQUE CONTROL;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Position sensorless vector control drives in the rotor-flux-oriented reference frame require precise estimation of rotor flux. A few open-loop rotor flux estimation methods are quite popular. However, the performance of these estimators is quite poor when the inverter switching frequency is quite low as in case of high power drives or when the ratio of switching frequency to maximum fundamental frequency is low as in case of high speed drives. This paper investigates an alternative approach of closed-loop rotor flux estimation for motor drives operated at low switching frequencies. This method is shown to be accurate in estimating the rotor flux, and thereby, ensuring good performance of the vector controlled drive at low as well as high speeds. Experimental results are presented on a 3.7-kW, 400-V, 50-Hz, vector controlled induction drive, switched at a frequency of 500 Hz.
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页数：6
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