Abstract
The cross regulation rate affects the voltage accuracy of the multi-output power supply. To fundamentally improve the cross regulation rate of the multi-output forward converter, a control strategy based on power distribution is proposed. The real-time voltage and real-time current of each output end are sampled by ARM to obtain real-time load, the expected output power is calculated according to the expected output voltage of each path, and the conductance of the main switch and the secondary rectifier are calculated according to the working principle and hardware parameters of the forward converter on time, so that each output gets the desired voltage. The experimental results show that the multi-output forward converter using power distribution control has a cross regulation rate of less than 1% and a load regulation rate of less than 0.4%. The designed forward converter can not only effectively improve the cross regulation rate, but also have better load regulation.
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