Discontinuous pulse width modulation methods with neutral point voltage balancing for three phase Vienna rectifiers
Discontinuous pulse width modulation methods with neutral point voltage balancing for three phase Vienna rectifiers
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DOI：
10.1109/ecce.2015.7309692
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发表时间：
2015-10
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通讯作者：
Xuning Zhang;Qiong Wang;R. Burgos;D. Boroyevich
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文献类型：
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作者：
Xuning Zhang;Qiong Wang;R. Burgos;D. Boroyevich
针对三相维也纳整流器提出了两种不同性能优化目标的不连续脉宽调制（DPWM）方法。一个用于开关损耗最小化，另一个用于通过中性点电压可控性降低开关损耗。由于维也纳整流器的电流换向特性，可用的空间电压矢量是有限的。考虑到这一点，选择不同的小矢量用于不同的性能优化。给出了这两种调制方法的具体实现。从半导体损耗和中点电压涟漪两个方面比较了两种调制方法与一种常用的断续PWM调制方法的系统性能。通过仿真和实验验证了分析的基础上，3千瓦维也纳整流器的效率高于99%，在标称负载。
This paper presents two discontinuous pulse width modulation (DPWM) methods for three phase Vienna rectifiers with different performance optimization targets. One for switching loss minimization and one for switching loss reduction with the neutral point voltage controllability. Due to the current commutation characteristics if Vienna rectifiers, the available space voltage vectors are limited. With this consideration, different small vectors are selected for different performance optimization. The detailed implementation of the two modulation methods are presented. System performance with the proposed two modulation methods are compared with one commonly used discontinuous PWM modulation method in the aspects of semi-conductor loss and neutral point voltage ripple. The analysis is verified through both simulations and experiments based on a 3 kW Vienna rectifier with efficiency higher than 99% at nominal load.