反激开关电源在洗衣机控制系统的应用

为了解决洗衣机控制器反激开关电源的两路输出电源带载差别较大时电压输出不稳的问题，采用负载端使用假负载、用PC817和TL431组成反馈回路并采用主极点补偿方式进行动态补偿，仿真及实测结果表明，当5 V输出满载12 V输出空载时，可以将12 V电压波动控制在10%范围内；当12 V满载5 V空载时，可以将5 V电压波动控制在2%范围内；两路带载情况下，双路输出电压波动可控制在2%范围内，实际应用表明，该方案可行有效。

Application of flyback switching power in washing machine control system

In order to solve the output unbalance of the flyback switching power supply of the washing machine controller, through using the false load, and the feedback loop with PC817 and TL431 by main pole compensation. Simulation and measurement results show that 12 V fluctuation can be controlled within 10%,When 12 V empty load and 5 V full load;5V fluctuation can be controlled within 2% range, When 12 V full load and 5 V empty load; The two way output voltage fluctuation can be controlled within 2% range, the practical application shows that the flyback switching power supply is feasible and effective.