摘要
系统为反激式开关电源,采用脉宽调制(PWM)式控制方式:固定开关频率,通过改变脉冲宽度改变占空比。利用体积很小的高频变压器实现电压变换及电网的隔离。稳压控制采用DSP实现.系统根据反馈电压及时改变输出PWM波形占空比,使输出电压保持稳定。
The system is an arc-impetus switching power supply, adopting the pulse-duration modulation （PWM） control mode： the fixed turn-on frequency, occupying the spatial ratio along with the change of pulse width ~ It is realized by the small-bulk and high-frequency transformer to transform voltage and isolate power network . The output of the PWM waveform and the control of the stable voltage are realized by the DSP （TMS320F240）.The system changes the occupy-spatial ratio of the output PWM waveform according to the feedback voltage to keep the output voltage stable.
出处
《微计算机信息》
北大核心
2006年第07Z期188-190,共3页
Control & Automation
