负载换相逆变器驱动电励磁同步电机静止及低速转子位置检测方法

doi:10.19595/j.cnki.1000-6753.tces.181120

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Abstract

In the load commutated inverter fed (LCI-fed) electrically excited synchronous motor control system, since the LCI fails to generate suitable high-frequency signals, the conventional rotor position detection method by high frequency signal injection cannot be realized. A rotor position detection method at standstill or low speed based on the field current harmonic is proposed in this paper. Firstly, the detailed formula derivation and theoretical analysis are given, and the signal processing algorithm is simplified. Then, a harmonic component with appropriate frequency is selected from the field current to replace the injected high frequency signal, and the corresponding field current harmonic control strategy is given. In order to reduce the detection error caused by the simplified algorithm in signal processing, the adequate bandpass filter is designed and the detection error caused by the filter is compensated. Finally, the proposed rotor position detection method at standstill or low speed based on the field current harmonic is verified at a 15kW LCI-fed electrically excited synchronous motor experimental platform. The results show that the proposed rotor position detection method can effectively detect the rotor position from standstill to 20% synchronous speed, and has better detection accuracy below 10% synchronous speed.

Key words： Load commutated inverter electrically excited synchronous motor sensorless control rotor position detection

Received: 29 June 2018 Published: 29 December 2018

PACS:

TM359.7

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	Kou Jiabao
	Gao Qiang
	Xu Ke
	Xu Dianguo

Cite this article:

Kou Jiabao,Gao Qiang,Xu Ke等. Rotor Position Detection Method at Standstill or Low Speed for Load Commutated Inverter-Fed Electrically Excited Synchronous Motor[J]. Transactions of China Electrotechnical Society, 2018, 33(24): 5670-5677.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.181120 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I24/5670

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