Development of Multiple-Frequency Wireless Coordinative Motor Drives

Abstract

This paper proposes and implements a novel class of inductor-capacitor-capacitor wireless coordinative DC motor drives, which not only performs selective wireless power to motors, but also achieves power equalization to ensure the same operation for isolated robotic arms. The key is to make use of the selective wireless power transfer with several resonant frequencies and then use only one transmitter with the inductor-capacitor-capacitor compensation network to provide multiple-frequency transmission without relying on the switched-capacitor array. In order to provide simultaneous and independent wireless power to different motors and hence achieve the desired coordinative motion, a time-division multiplexing scheme and burst firing control are newly employed. Thus, the wireless power transfer system with multiple receivers can achieve better flexibility and simplicity. Both finite element analysis and experimental results are given to verify the validity of the proposed inductor-capacitorcapacitor wireless coordinative DC motor drive. As a result, the motors can achieve independent motion with 1200 rpm and simultaneous motion with 400 rpm when the torque is 10 Ncm, and the operating frequencies are set at 110 kHz and 130 kHz.

A Critical Review of Emerging Technologies for Electric and Hybrid Vehicles

“…2) Due to the mobility of the EV, the misalignment between the primary and secondary coils of the pad-based MAC system inevitably affects the performance of existing WPT techniques. The homogeneous WPT technique has been proposed [126,127], which utilizes the alternate winding design to gaplessly assemble primary coils to enhance the magnetic flux density, and the vertical-and-horizontal secondary coil to improve the capability of acquiring energy, especially in the area of the coils gap. Hence, it can effectively improve the power transfer performance of this pad-based MAC system.…”

Design and Control of Cost Effective Wireless Power Transfer Systems of AC Motor Drives with Efficiency Maximization

“…In addition,the wireless power transfer system is proposed to drive a secondary side servomotor [19]- [20].Inthissystem,theprimary inverter works under two different operating frequencies. As aresult, two distinct converters are employed in the secondaryside.Multireceiversarealsousedindependentlywithdifferent resonance frequencies to pick-up the primary injectedpower [21]- [23]. New compensator topologies are introducedin wireless motor drive applications to simplify the control procedure.…”