用于大VA、PWM驱动系统的12/24脉冲自动连接整流器的设计考虑

APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285) Pub Date : 1999-03-14 DOI:10.1109/APEC.1999.750475

D. Rendusara, K.J. Slater, B.S. Lee, P. Enjeti, I. Pitel, W. Gray

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引用次数: 13

摘要

自动连接多脉冲(12/24脉冲)整流方案是降低PWM电机驱动系统中线路电流谐波的经济有效方法。采用这些方案来提高公用事业电能质量需要仔细注意几个设计考虑因素。特别是:直流电压在空载时的偏移;原有电压畸变的影响;阻抗不匹配;整流电流分担时二极管降差不等;并对性能进行了全面分析。讨论了提高12/24脉冲整流系统性能的几种纠正措施。最后，详细讨论了采用12/24脉冲整流系统改造的460 V, 60 Hz, 400 kVA商用ASD的实验结果。

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Design considerations for 12/24-pulse auto-connected rectifiers for large VA, PWM drive systems

Auto-connected multipulse (12/24 pulse) rectifier schemes are cost-effective methods for reducing line current harmonics in PWM motor drive systems. Employing these schemes to enhance utility power quality requires careful attention to several design considerations. In particular: excursion of DC-link voltage at no load; effect of pre-existing voltage distortion; impedance mismatches; unequal diode drops on rectifier current sharing; and performance are fully analyzed. Several corrective measures to improve the performance of 12/24-pulse rectifier systems are also discussed. Finally, experimental results on a 460 V, 60 Hz, 400 kVA commercial ASD, retrofitted with 12/24 pulse rectifier systems, are discussed in detail.

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APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)

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