【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。更多还原

【Abstract】 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 ac- cording to the feedback voltage to keep the output voltage stable.更多还原