Wireless Shaded-Pole Induction Motor With Half-Bridge Inverter and Dual-Frequency Resonant Network

This article presented a single-phase shaded-pole induction motor (SPIM) system, which aims to work in an isolated environment. Compared with the previous wireless SPIM, this system employs less controlled switches and can work at full-resonant condition, while retaining the merit of secondary controllerless. The key is to employ a half-bridge inverter and a proper dual-frequency resonant network; thus, only two controlled switches are adopted at the motor side. Since the SPIM is purposely designed with a dual-stator winding, the system robustness and efficiency can be significantly improved. In this article, simulation has been conducted to verify the system's feasibility and self-drive ability. Meanwhile, a 30-W prototype has been built for the experimental verification, and the results show that this motor can achieve flexible speed control with the transfer distance of 20 mm and the transmission efficiency of 77%.

Automated summary

This article presents a single-phase shaded-pole induction motor system designed to work in isolated environments. Compared to previous wireless systems, it uses fewer controlled switches and can operate at full resonance. By utilizing a half-bridge inverter and a dual-frequency resonant network, only two controlled switches are needed on the motor side, resulting in improved efficiency and robustness. Simulation results and experimental verification with a 30-W prototype demonstrate flexible speed control with a transfer distance of 20 mm and a transmission efficiency of 77%.