Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)
- 1998.07a
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- Pages.85-89
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- 1998
Performance Improvement of Zero Voltage Switching PWM Half Bridge DC/DC Converter Using Time Delay Control Method
시간 지연 제어를 이용한 영전압 스위칭 PWM 하프 브릿지 컨버터의 제어 성능 개선
Abstract
A switching power stage is a very nonlinear system because it has two or more operation modes in one switching cycle. To model a switching power stage, the state space averaging method has been developed. Though it allows a unified treatment of a large variety of switching power stages, the model it yields is always very nonlinear. So, it is required to linearize the averaged model. But it is well known that a controller for a nonlinear plant designed by the linearization frequently fails in showing satisfactory control performance. Hence it is very natural to try to design a nonlinear controller for a switching power stage. In design of a switching power system, nonlinear control approaches such as adaptive control and fuzzy control have been widely studied so far. In this research, a recently developed control method, time delay control is briefly studied and a design example for a ZVS PWM half bridge converter is given. The performance of the time delay controller is compared to its conventional counterpart, PI controller by computer simulations.
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