微波数字连续调功及时间控制器设计

提出的设计方案是根据医用微波仪器调功的要求指标，对微波磁控管的高压伏 安特性进行了实验研究，得到了磁控管的伏安特性，确定了阳极电流在50～300mA段的调功 方案。由此确定了一个由单片机为中心的闭环控制系统，由可控硅调压器实现连续调功。该 控制器具有数字显示、**定时功能，硬件电路简单，控制可靠灵活，已在微波设备上 得到应用。  Design of Digital Microwave Power Continuously Adjusting and Timing Controller

Li Mingwei， Li lingao，Wang Fang

(Dept.of Electronic Engineering, Dalian University of Technolog y, Dalian 116023，China)

Abstract：According to the request of the medical microwave instr uments power adjusting, the voltampere characteristic of magnetrons is descr ib ed and a scheme of power adjusting is presented when the anode current is in the range of 50～300mA on the base of the study of the volt-ampere characteristic of magnetrons. Moreover, a closed loop control system whose corn is a MCU is pre sented, and the magnetrons power continuously adjusting is accomplished with a SCR. Thie controller has a digital display and precise timing function, and has been used in several sorts of the microwave equipment because of its simple hard ware circuit and reliable control method.

Key Words：Magnetron；Power Adjusting；Control