基于双调谐串联谐振的单输入双输出无线电能传输系统及其解耦控制算法

This paper introduces a single-input dual-output (SIDO) wireless power transfer (WPT) system based on a dual-tuned series-series (DT-SS) resonant circuit, to address the demand for independent dual-voltage regulation in advanced medical devices such as computed tomography (CT) scanners. The system employs simultaneous dual-frequency transmission at 60kHz and 180kHz. By optimizing resonant capacitor parameters to enable simultaneous dual-frequency operation and implementing a hybrid asymmetric duty cycle-phase shift (ADC-PS) control strategy, the system achieves decoupled power regulation for two output channels. The ADC-PS modulation introduces three degrees of freedom (two bridge-arm midpoint-to-ground voltage duty cycles and an inter-bridge-arm phase-shift angle) to suppress cross-channel interference. Experimental results using a CT prototype validate a peak system efficiency of 87.65% at the maximum total output power of 400W, exhibiting near-complete decoupling between both secondary outputs. The system demonstrates stable 48V-to-96V regulation in the primary power loop and simultaneous 12V-to-24V regulation for control electronics, with both loops operating independently under dynamic loading conditions while sustaining regulated voltage stability.