A Sinusoidal-Driven Wireless Integrated Single-Phase Induction Motor

In this article, a sinusoidal-driven wireless integrated single-phase induction motor system featuring a dual stator-winding structure is introduced. The innovative dual stator-winding structure eliminates the drawback of needing power frequency conversion at the energy receiving side of previous single-phase wireless motors. Consequently, the motor can be wirelessly driven from the energy transmitting side, requiring no active power electronic components on the receiving side. Additionally, the use of envelope modulation technology to control the inverter enables the motor to be driven efficiently using sinusoidal-wave voltage. Thus, the entire system provides a safer and more convenient fully-isolated actuator solution for conventional single-phase induction motor applications operating in harsh environments. Initially, the novel integrated wireless motor was introduced and analyzed, focusing specifically on the feasibility and operational mechanisms of the single-phase induction motor utilizing a dual stator-windings structure. Subsequently, the power and current outputted to the motor by the entire wireless motor system were analyzed, especially the frequency characteristics of its driving voltage, and a design methodology for the system was formulated based on the analyzed results. To validate the effectiveness of the proposed wireless motor, simulation models and an experimental prototype were developed. Both the simulated results and experimental results demonstrate that the sinusoidal wave-driven wireless integrated single-phase induction motor system can operate effectively at 1410 rpm with 91.2% efficiency.