{"title":"具有开关损耗优化功能的 Z 源逆变器通用非连续 PWM 策略","authors":"Yizhan Jiang, Qiang Wang, Fengyou He, Jingwei Zhang, Zhikang Guo","doi":"10.1007/s43236-024-00883-5","DOIUrl":null,"url":null,"abstract":"<p>The shoot-through state of the Z-source inverter generates large switching losses. However, the discontinuous modulation strategy can effectively reduce the switching losses of power devices. When the discontinuous modulation strategy is used in Z-source inverters, the switching sequences and the shoot-through states need to be arranged reasonably. This paper provides a method for comparing the switching losses of different modulation strategies by calculating the current that is passed through a switching device for a fundamental cycle. The calculations show that the Z-source inverter switching losses are determined by the number of switching actions in a switching period and by the method of insertion of the shoot-through state. Based on this, a generalized discontinuous modulation strategy for Z-source inverters is proposed. This modulation strategy achieves optimal switching losses when the power factor is less than 1. The method of redistributing the shoot-through states can be applied to other modulation strategies to achieve loss optimization. The effectiveness of the proposed modulation method is demonstrated by MATLAB/Simulink combined with PLECS simulation. Finally, and a low-power platform is built for experimental verification.</p>","PeriodicalId":50081,"journal":{"name":"Journal of Power Electronics","volume":"21 1","pages":""},"PeriodicalIF":1.3000,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Generalized discontinuous PWM strategy for Z-source inverters with switch losses optimization\",\"authors\":\"Yizhan Jiang, Qiang Wang, Fengyou He, Jingwei Zhang, Zhikang Guo\",\"doi\":\"10.1007/s43236-024-00883-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The shoot-through state of the Z-source inverter generates large switching losses. However, the discontinuous modulation strategy can effectively reduce the switching losses of power devices. When the discontinuous modulation strategy is used in Z-source inverters, the switching sequences and the shoot-through states need to be arranged reasonably. This paper provides a method for comparing the switching losses of different modulation strategies by calculating the current that is passed through a switching device for a fundamental cycle. The calculations show that the Z-source inverter switching losses are determined by the number of switching actions in a switching period and by the method of insertion of the shoot-through state. Based on this, a generalized discontinuous modulation strategy for Z-source inverters is proposed. This modulation strategy achieves optimal switching losses when the power factor is less than 1. The method of redistributing the shoot-through states can be applied to other modulation strategies to achieve loss optimization. The effectiveness of the proposed modulation method is demonstrated by MATLAB/Simulink combined with PLECS simulation. Finally, and a low-power platform is built for experimental verification.</p>\",\"PeriodicalId\":50081,\"journal\":{\"name\":\"Journal of Power Electronics\",\"volume\":\"21 1\",\"pages\":\"\"},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2024-07-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Power Electronics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1007/s43236-024-00883-5\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Power Electronics","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s43236-024-00883-5","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
摘要
Z 源逆变器的击穿状态会产生较大的开关损耗。然而,非连续调制策略可以有效降低功率器件的开关损耗。在 Z 源逆变器中使用非连续调制策略时,需要合理安排开关序列和击穿状态。本文通过计算一个基本周期内通过开关器件的电流,提供了一种比较不同调制策略开关损耗的方法。计算结果表明,Z 源逆变器的开关损耗取决于开关周期内的开关动作次数和插入击穿状态的方法。在此基础上,提出了一种适用于 Z 源逆变器的通用非连续调制策略。当功率因数小于 1 时,该调制策略可实现最佳开关损耗。重新分配击穿状态的方法可应用于其他调制策略,以实现损耗优化。MATLAB/Simulink 结合 PLECS 仿真证明了所提调制方法的有效性。最后,还搭建了一个低功耗平台进行实验验证。
Generalized discontinuous PWM strategy for Z-source inverters with switch losses optimization
The shoot-through state of the Z-source inverter generates large switching losses. However, the discontinuous modulation strategy can effectively reduce the switching losses of power devices. When the discontinuous modulation strategy is used in Z-source inverters, the switching sequences and the shoot-through states need to be arranged reasonably. This paper provides a method for comparing the switching losses of different modulation strategies by calculating the current that is passed through a switching device for a fundamental cycle. The calculations show that the Z-source inverter switching losses are determined by the number of switching actions in a switching period and by the method of insertion of the shoot-through state. Based on this, a generalized discontinuous modulation strategy for Z-source inverters is proposed. This modulation strategy achieves optimal switching losses when the power factor is less than 1. The method of redistributing the shoot-through states can be applied to other modulation strategies to achieve loss optimization. The effectiveness of the proposed modulation method is demonstrated by MATLAB/Simulink combined with PLECS simulation. Finally, and a low-power platform is built for experimental verification.
期刊介绍:
The scope of Journal of Power Electronics includes all issues in the field of Power Electronics. Included are techniques for power converters, adjustable speed drives, renewable energy, power quality and utility applications, analysis, modeling and control, power devices and components, power electronics education, and other application.