{"title":"基于 DSP 的自适应数字控制方法,用于 MCR-WPT 系统的频率跟踪和阻抗角控制","authors":"Jin Luo, Hao Shen, Xiaojuan Xu","doi":"10.1007/s43236-024-00903-4","DOIUrl":null,"url":null,"abstract":"<p>Aiming at the problem where the transmission power and transmission efficiency are affected by frequency detuning in wireless power transfer (WPT), a frequency tracking method using current-over-zero comparison and a digital control method using a dynamic time lag is proposed based on the digital signal processing (DSP) technology. The proposed method only needs to determine the time when current passes the zero point and start current sampling. Then a simple digital phase-locked loop (PLL) can be accomplished by comparing the current sampling value with the setting current value at the zero point. Combined with voltage–current double closed-loop phase-shift control, constant current or voltage output is realized. Finally, a DSP-based experimental setup with an output power of 300 W is designed for a series of verification experiments. The findings show that the method can achieve fast frequency tracking as well as phase adjustment when the air-gap distance and load are changed. It also satisfies constant current or voltage output. More importantly, the transmission efficiency of the weak inductive state achieved by the proposed method is better than that of the fixed-frequency and resonant-frequency state. In addition, it is 5% higher than that of the fixed-frequency state.</p>","PeriodicalId":50081,"journal":{"name":"Journal of Power Electronics","volume":"2 1","pages":""},"PeriodicalIF":1.3000,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"DSP-based adaptive digital control method for frequency tracking and impedance angle control of MCR–WPT systems\",\"authors\":\"Jin Luo, Hao Shen, Xiaojuan Xu\",\"doi\":\"10.1007/s43236-024-00903-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Aiming at the problem where the transmission power and transmission efficiency are affected by frequency detuning in wireless power transfer (WPT), a frequency tracking method using current-over-zero comparison and a digital control method using a dynamic time lag is proposed based on the digital signal processing (DSP) technology. The proposed method only needs to determine the time when current passes the zero point and start current sampling. Then a simple digital phase-locked loop (PLL) can be accomplished by comparing the current sampling value with the setting current value at the zero point. Combined with voltage–current double closed-loop phase-shift control, constant current or voltage output is realized. Finally, a DSP-based experimental setup with an output power of 300 W is designed for a series of verification experiments. The findings show that the method can achieve fast frequency tracking as well as phase adjustment when the air-gap distance and load are changed. It also satisfies constant current or voltage output. More importantly, the transmission efficiency of the weak inductive state achieved by the proposed method is better than that of the fixed-frequency and resonant-frequency state. In addition, it is 5% higher than that of the fixed-frequency state.</p>\",\"PeriodicalId\":50081,\"journal\":{\"name\":\"Journal of Power Electronics\",\"volume\":\"2 1\",\"pages\":\"\"},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2024-09-05\",\"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/s43236-024-00903-4\",\"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/s43236-024-00903-4","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}
DSP-based adaptive digital control method for frequency tracking and impedance angle control of MCR–WPT systems
Aiming at the problem where the transmission power and transmission efficiency are affected by frequency detuning in wireless power transfer (WPT), a frequency tracking method using current-over-zero comparison and a digital control method using a dynamic time lag is proposed based on the digital signal processing (DSP) technology. The proposed method only needs to determine the time when current passes the zero point and start current sampling. Then a simple digital phase-locked loop (PLL) can be accomplished by comparing the current sampling value with the setting current value at the zero point. Combined with voltage–current double closed-loop phase-shift control, constant current or voltage output is realized. Finally, a DSP-based experimental setup with an output power of 300 W is designed for a series of verification experiments. The findings show that the method can achieve fast frequency tracking as well as phase adjustment when the air-gap distance and load are changed. It also satisfies constant current or voltage output. More importantly, the transmission efficiency of the weak inductive state achieved by the proposed method is better than that of the fixed-frequency and resonant-frequency state. In addition, it is 5% higher than that of the fixed-frequency state.
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.