Discussion and Conclusion

Summary

For the most well‐known pulse width modulation (PWM) converters, buck–boost, boost–buck (Cuk), sepic, and Zeta converters have the same transfer code, but they have different circuit configurations. Except the buck–boost converter, they are all the fourth‐order converters. To make a buck–boost converter become a fourth‐orderone, an extra LC filter is inserted to the converter, in which the DC voltage offset of capacitor is 0V. This chapter discusses topological duality and circuital duality. It presents identification of new PWM converters based on circuital duality and analogy of PWM converters to DNA. The graft and layer schemes are adopted to derive the new buck–boost, Cuk, sepic, and Zeta converters based on the newly derived buck and boost converters. The chapter also presents the fundamentals of circuit theories, the mechanisms of developing power converters, decoding and synthesizing processes, and determination of component stresses of their switches.