A Segmented Reverse-Phase Switching-Based Current-Chopping PWM Approach for Data and Power Synchronous Transmission in SRG

The switched reluctance generator (SRG) has found wide applications due to its advantages of simple structure, flexible controllability, strong fault tolerance, and good adaptability. Establishing reliable communication for SRGs is key to achieving remote control, status monitoring, and early fault detection in SRG-based power systems. This article introduces a novel data and power dual modulation (DPDM) strategy for data and power synchronous transmission (DPST) in an SRG converter-integrated dc power network. The strategy is based on segmented reverse-phase switching operations using current-chopping pulsewidth modulation (PWM), where the phase turn-off angle serves as the switching threshold. Multichannel data are modulated alongside power using orthogonal address codes to generate voltage ripples as data carriers through frequency shift keying (FSK). Consequently, multiple data channels can be transmitted synchronously over the same power bus. On the data receiving end, a sliding window-based fast Fourier transform (FFT) method is employed to demodulate the original data from the bus voltage ripples. Experimental results confirm that the proposed method can accurately transmit multiple-channel data with a limited bus voltage.