Design of a Voltage-Controlled Isolated Weinberg Converter Based on Digital Control

This paper presents the design of an isolated Weinberg converter employing digital control and incorporates an RCD clamping circuit to mitigate voltage spikes. The voltage-controlled loop displays significant phase lag, and due to the delay introduced by digital control, a type III compensator is required. The compensator is initially designed in the continuous domain and subsequently discretized into a digital compensator using the Tustin method. It is then implemented in the DSP as a difference equation. Simulation results demonstrate that this control strategy exhibits a favorable dynamic response. In experimental testing, an efficiency of 96.2% was measured at an output power of 668 W with soft switching. The efficiency improves as the output power increases.