CAJ | 학술논문

基于直接数字频率合成技术设计了一种新型高精度数控交流恒流源系统。该系统由低频正弦信号发生器和恒流源电路组成，其中正弦信号发生器由STM32单片机搭建，恒流源电路在功率放大电路的基础上添加反馈网络，使新型恒流源具有更高的输出精度和更好的幅值稳定性。测试结果显示：该恒流源输出电流的幅值、频率、相位、输出时长可控，具有工作稳定好、精度高、噪声小的特点。
기우직접수자빈솔합성기술설계료일충신형고정도수공교류항류원계통。해계통유저빈정현신호발생기화항류원전로조성，기중정현신호발생기유STM32단편궤탑건，항류원전로재공솔방대전로적기출상첨가반궤망락，사신형항류원구유경고적수출정도화경호적폭치은정성。측시결과현시：해항류원수출전류적폭치、빈솔、상위、수출시장가공，구유공작은정호、정도고、조성소적특점。
The paper designs a new high-precision digital controlled alternating constant-current source system (ACCS),which is based on direct digital synthesis techniques.The system consists of the low frequency sine signal generator(SSG)and the constant-current circuits,in which SSG builds on STM32 Microprocessor and the constant-current circuits designs is in use of feedback based on power amplifying circuit,in order to achieve high output precision and high amplitude stability. The results show that the new ACCS can provide output current with controlled amplitude,frequency,phase,the output length,with characteristics of higher stability and precision,as well as lower noise.