| 超声波电源的改进频率跟踪方法 |
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| 引用本文： | 侯光华,杜贵平,罗杰.超声波电源的改进频率跟踪方法[J].电源学报,2019,17(1):152-158. |
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| 作者姓名： | 侯光华 杜贵平 罗杰 |
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| 作者单位： | 华南理工大学电力学院 |
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| 基金项目： | 广东省应用型科技研发专项资金项目 |
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| 摘 要： | 针对传统超声波电源频率跟踪方法计算周期数多、过渡时间长的缺点,提出了一种基于谐振频率自动识别的改进型超声波电源变步长频率跟踪控制方法。该方法通过2次采样,计算得到负载的谐振频率,进而利用变步长控制对换能器谐振状态进行保持。实验证明,基于该控制方法的系统可以提升频率跟踪速度,减少系统过渡时间,改善动态响应特性,能更好地满足超声电源的性能要求。
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| 关 键 词： | 超声波电源 变步长 自动识别 频率跟踪 |
| 收稿时间： | 2016/10/4 0:00:00 |
| 修稿时间： | 2018/10/9 0:00:00 |
An Improved Frequency Tracking Method for Ultrasonic Power Supply |
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| HOU Guanghu,DU Guiping and LUO Jie.An Improved Frequency Tracking Method for Ultrasonic Power Supply[J].Journal of power supply,2019,17(1):152-158. |
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| Authors: | HOU Guanghu DU Guiping and LUO Jie |
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| Affiliation: | School of Electric Power, South China University of Technology, Guangzhou 510640, China,School of Electric Power, South China University of Technology, Guangzhou 510640, China and School of Electric Power, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | Abstract: In consideration of the drawbacks of the traditional frequency tracking method for ultrasonic power supply, such as too many machine cycles and a long transient time, an improved variable step-size frequency tracking control method based on resonant-frequency automatic identification is proposed in this paper. This method can calculate the resonant frequency of load in two machine cycles, thus keeping the ultrasonic transducer in a resonant state by variable step-size control. Experimental results showed that the system based on this control method can improve the frequency tracking speed, reduce the transient time, and improve the dynamic response characteristics of the system, which met the requirements of ultrasonic power supply. |
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| Keywords: | ultrasonic power supply variable step size automatic identification frequency tracking |
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