基于电压跟踪的高效率YIG调谐激励器原理与设计  

Principle and design of high efficiency YIG-tuned driver circuit based on voltage tracking

作　　者：赵勇[1] 代中华[1] 张弛 ZHAO Yong;DAI Zhong-hua;ZHANG Chi(Southwest Institute of Applied Magnetics, Mianyang 621000, China)

机构地区：[1]西南应用磁学研究所,四川绵阳621000

出　　处：《磁性材料及器件》2018年第2期34-38,共5页Journal of Magnetic Materials and Devices

摘　　要：基于电压跟踪方法实现的激励器可高效率驱动YIG器件。电路采用DC/DC变换器和线性恒流源的双级结构,前级DC/DC变换器实现将输入电压高效率转为略高于后级线性恒流源所需电压的中间值电压,后级采用线性恒流源产生高稳定度的电流,并消除前级DC/DC变换器的干扰。在前后级之间采用电压跟踪电路,该跟踪电路根据后级所需电压实时调整前级DC/DC变换器的输出,使其输出的中间电压始终为只比后级所需电压略高的固定值,从而在各种条件下都能获得最佳的激励效率。实验结果表明,该电路不仅适用于宽输入电压范围,而且在不同的负载电流下都可以获得40%以上的激励效率,在常用电压12~15 V,可比传统驱动电路提高效率30%以上,相同尺寸驱动器样品温升大幅降低。This design adopts the method of voltage-tracking to achieve optimum efficiency based on the scheme of high stable constant current source driven by switch and linear hybrid.The dual-stage structure of switch and linear hybrid adopts DC/DC converter,and the latter stage adopts MOSFET to improve efficiency.The voltage-tracking circuit senses DC/DC output voltage and device working voltage,through the loop adjustment effect,so that the DC/DC output voltage is always only slight higher than the fixed voltage value the device requires.The experimental results show that the circuit not only can obtain an incentive efficiency of higher than40%under different load current,but also apply to wide input voltage range.And it can enhance the efficiency by more than30%compared to that of linear constant current source circuit in the12-15V common input voltage range.As the input voltage increases,the temperature rise basically remains unchanged.

关 键 词：YIG调谐激励器 电压跟踪 效率 DC/DC变换器 输入电压 

分 类 号：TM46[电气工程—电器]