大功率牵引逆变器的中频区调制算法对比研究

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Abstract High power traction inverter used in railway transit has the characteristic of low switching frequency and wide speed range.The commonly used modulation algorithm is the asynchronous modulation in the low frequency region,and the square wave modulation in fundamental frequency.However,the modulation algorithm in the middle frequency region which is used as the transition between asynchronous modulation and square wave modulation,improving the inverter output harmonic characteristics,is not paid enough attention.The over-modulation and optimal synchronous modulation algorithm in the middle frequency region were studied in this paper.The modulation performance and application range were compared in detail.Simulation and experiments were carried out to verify the correlation analysis.The results show that the optimized synchronous modulation is relatively more complex in digital implementation,but has better harmonic characteristics and wider application prospects.

Key words： Inverter over-modulation optimal synchronous modulation harmonic analysis

Received: 29 July 2016 Published: 23 March 2017

PACS:

TM464

Fund:Supported by National Basic Research Program of China (No.2004CB619105)

About author:: ZhengHeYi (1980 -), male, PhD, mainly engaged in reading skin disease

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	Zhang Gang
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Zhang Gang,Dong Kan,Diao Lijun等. A Comparative Study of the Modulation Algorithm in Middle Frquency Region for High Power Traction Inverter[J]. Transactions of China Electrotechnical Society, 2016, 31(增刊2): 1-9.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I增刊2/1

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