For situations where multiple loads require a remote power supply, the concept of multi-channel multi-load wireless power transfer (MCML-WPT) emerges as a solution to enhance the efficacy of resonant inductive wireless power transfer. This approach utilizes multiple channels or pathways to facilitate energy transmission to multiple loads simultaneously. In MCML-WPT systems, the distribution of power among various loads is typically achieved by leveraging distinct operating frequencies. Multiple receiving coils are equipped with compensation mechanisms tailored to accommodate multiple resonant frequencies, while the primary side provides corresponding multi-frequency excitation sources through one or more coils. However, conventional MCML-WPT systems often grapple with issues such as intricate structural design, significant channel coupling, and intricate control mechanisms. This thesis primarily delves into the exploration of topology, modeling, control strategies, and advanced applications pertinent to MCML-WPT systems.

Firstly, a novel approach to decoupled MCML-WPT, utilizing multilevel inverters (MLIs), is presented. The inherent capability of MLIs to generate voltage waveforms with multiple frequency components facilitates seamless multi-frequency synthesis without the need for additional components. Moreover, a pioneering primary multi-frequency constant-current compensation (MFCC) technique is introduced to ensure consistent coil current and uphold constant-current (CC) and constant-voltage (CV) output.

Secondly, employing the MCML-WPT framework as its hardware foundation, this thesis introduces the concept of wireless energy routers (WERs) designed for flexible power regulation among multiple transceivers. Within the architecture of these WERs, pairs of transceivers can seamlessly share energy through independent energy channels, each operating at specific frequencies. Moreover, the routers facilitate omnidirectional power interaction and support various operation modes, enabling free control of power flow akin to the transmission of information over the internet.

Thirdly, the integration of MCML-WPT in wireless permanent magnet AC (PMAC) motors is explored. Distinguished by a fully passive motor side, the proposed wireless PMAC motor centralizes energy and control signals at the transmitter end. This innovative design simplifies the motor-side configuration by eliminating the need for motor-side control units and bulky capacitors, while also streamlining primary-secondary communication. The resulting system achieves seamless passive and automatic motor-side operation, ensuring stable speed tracking without requiring active intervention.

Finally, a novel type of genuine wireless motor (WM) is introduced, operating seamlessly without the requirement of position sensors or primary-secondary communication. Angle and speed estimation are achieved through primary-side high-frequency current, eliminating the need for motor-side encoders or communication modules. This breakthrough enables simultaneous transmission of energy and control data through three independent WPT channels, enabling comprehensive primary-side control without the need for additional motor-side circuits or auxiliary power supplies. Experimental validation confirms the sensorless operation's high efficiency, precise speed estimation, and smooth startup process.