Skip to main content
APEC 2026 Main banner

Single and Multi-Phase Inverters

T11.1 - Design of a Load-Independent Class-Φ2 Inverter with Ultra-Large Constant-Voltage-Output Range

Wednesday, March 25, 2026
8:30 AM - 8:50 AM CT
Location: 214C
This study presents a novel Class-Φ2 inverter topology consisting of a Class Φ2 inverter and a fundamental-harmonic-enhanced LC parallel output that exhibits extraordinary load-independent (LI) characteristics. Different from conventional topologies, the load-correlation design of the Φ2 input resonant network and LC-LC output filter result in ultra-wide Constant-Voltage (CV) output and full-range Zero-Voltage-Switching (ZVS) operation with reduced reverse-conduction (body-diode conduction) loss. The detailed operation principle and parameter design procedure of the proposed topology is introduced. After meticulous optimization of parameter design and simulation verification by LTspice, a 36V-input experimental prototype is fabricated and tested at 1MHz to validate the design. The measured result shows the CV output and ZVS operation with nearly zero-reverse-conduction loss is maintained within the load range from 2Ω to infinity. Meanwhile, the prototype achieves a peak efficiency of 98.9% at 220W output and full-load efficiency of 98.18% at rated power of 540W, indicating a significant improvement in efficiency and power density compared to other similar works.