Abstract
The One-Cycle Controlled Boost Power Factor Correction converter has one voltage control loop, which may exhibit instability when the load is light. The instability results in a low Power Factor. To ensure that the Power Factor is high, a time delay circuit was adopted in this paper to control the instability of the converter. The architecture of the time delay circuit is described, and its transfer function is derived. The double averaging method was applied to the converter to determine the parameters in the control method. Experimental results verified the time delay control method in the converter. The power factor increased from 0.82 to 0.99 after activating the delay control circuit.
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