高效率YIG调谐激励器驱动电路设计  

Design of high efficiency driver circuit for YIG-tuned driver

作　　者：赵勇[1] 张弛 何大鹏[1] 代中华[1] 

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1期31-34,共4页Journal of Magnetic Materials and Devices

摘　　要：针对传统YIG调谐激励器线性恒流源电路效率低、功耗大、发热严重的问题,提出了一种高效率驱动电路,该电路由前级DC/DC变换器和后级数控恒流源构成。前级DC/DC变换器采用高频BUCK型变换产生中间值电压,以提高效率;后级数控恒流源采用基于MOSFET的线性恒流电路,以保证恒流精度,并采用小电阻取样与放大电路结合的方式取代大取样电阻,用MOSFET取代达林顿管等技术降低功耗。通过DC/DC变换器和线性恒流源电路结合的方式,在保持传统线性恒流电路高性能优势的同时获得较高的驱动效率。实验结果表明,该电路具有较宽的工作电压,在7~28 V输入电压范围内,都可达到70%以上的驱动效率;当输入电压大于12 V时,驱动效率比传统线性恒流电路提升30%以上。Considering the shortage of tradiatonal linear constant current source circuit for YIG-tuned driver, such as low efficiency, high power consumption and serious heat, a kind of high efficiency driver circuit was proposed. The circuit is composed of DC/DC converter and constant current source. The DC/DC converter uses the high-frequency BUCK circuit to generate the intermediate value voltage to improve the efficiency. The constant current source uses the MOSFET-based linear constant current circuit to ensure the current precision and adopts the sampling resistor of small resistance combined with the amplifier to replace the sampling resistor of large resistance, with MOSFET instead of Darlington transistors to reduce power consumption. Through the combination of DC/DC converter and linear constant current source circuit, high drive efficiency was achieved while maintaining high performance advantages. The experimental results show that, the circuit features wide operating voltage, and drive efficiency of higher than 70 % in 7 to 28 V input voltage range; when the input voltage is greater than 12 V, efficiency is increased by more than 30 % compared with the traditional driver circuit.

关 键 词：YIG调谐激励器 驱动电路 DC/DC变换器 输入电压 效率 

分 类 号：TM13[电气工程—电工理论与新技术]