适用于变频控制类芯片的新型光电耦合隔离电路

发布时间：2018-01-14 16:19

本文关键词：适用于变频控制类芯片的新型光电耦合隔离电路　出处：《华北电力大学学报(自然科学版)》2017年02期 　论文类型：期刊论文

【摘要】：电力电子设备主回路与控制芯片间的电气隔离是保护芯片并阻隔干扰的常规手段。光电耦合器因其具有体积小、寿命长和输入输出间绝缘等优点,已成为实现主回路与控制芯片间隔离的主要选择。然而考虑到光电耦合器输出侧电流及寄生电容的不利影响,变频控制类芯片(如UBA2032等)通常采用变压器隔离主回路,这与电力电子设备高功率密度的发展趋势不符。深入研究以光电耦合器和变压器为核心器件的用于实现主回路与控制芯片间隔离的常规电路,分析指出采用光电耦合器隔离主回路与变频控制类芯片时存在的技术问题,提出一种可有效应对上述问题的新型光电耦合隔离电路并给出该电路参数的计算方法。仿真及实验结果验证了所提出的光电耦合隔离电路的优越性及有效性。
[Abstract]:The electrical isolation between the main circuit of power electronic equipment and the control chip is the conventional means to protect the chip and block the interference. The photoelectric coupler has the advantages of small size, long life and insulation between the input and output. It has become the main choice to separate the main circuit from the control chip. However, considering the negative effects of the output current and parasitic capacitance of the optocoupler. Frequency conversion control chips (such as UBA2032, etc.) usually use transformers to isolate the main circuit. This is not in accordance with the development trend of high power density of power electronic equipment. The conventional circuit which uses photocoupler and transformer as the core devices to realize the isolation between the main circuit and the control chip is studied. The technical problems of isolating main circuit and frequency conversion control chip by optoelectronic coupler are analyzed. A novel optoelectronic coupling isolation circuit which can effectively deal with the above problems is proposed and the calculation method of the circuit parameters is given. The simulation and experimental results verify the superiority and effectiveness of the proposed optoelectronic coupling isolation circuit.
【作者单位】：华北电力大学新能源电力系统国家重点实验室;
【基金】：国家高技术研究发展计划(863计划)项目(2015AA050 603) 中央高校基本科研业务费专项资金项目(2015XS110)
【分类号】：TN402
【正文快照】： 0引言随着集成电路的广泛应用及功率半导体技术的不断革新,采用集成芯片控制的兼具高运行频率、高工作效率及高功率密度的电力电子设备得到业内专家学者的广泛关注[1-3]。考虑到电力电子设备的高频化严重干扰控制芯片的安全稳定运行,故通常在设备主回路与芯片间进行电气隔离。

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