USPTO Patent Granted for Wireless In-Wheel Motor Drive Optimization

ChangeBridge: Patent Grants - Power Supply (H02J)

Published March 24th, 2026

Detected March 25th, 2026

Summary

The USPTO has granted a patent to the City University of Hong Kong for a wireless in-wheel motor drive system and an optimization method. The patent, US12583311B1, focuses on ensuring soft switching, reducing system volume, and minimizing power losses for improved efficiency.

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What changed

The United States Patent and Trademark Office (USPTO) has granted patent US12583311B1 to the City University of Hong Kong for a novel wireless soft-switching in-wheel motor drive system and its associated optimization method. The invention involves pre-misaligning primary and secondary windings of a magnetic coupler to achieve a specific input impedance characteristic, ensuring soft switching, reduced system volume, minimized power losses, and high efficiency.

This patent grant signifies the protection of intellectual property related to advanced automotive power systems. While it does not impose direct compliance obligations on regulated entities, it may influence future product development and licensing strategies within the automotive and electric vehicle sectors. Companies developing or utilizing in-wheel motor technology should be aware of this patent's claims and consider potential licensing requirements or design implications.

Source document (simplified)

← USPTO Patent Grants

Wireless in-wheel motor drive and method for optimizing the same

Grant US12583311B1 Kind: B1 Mar 24, 2026

Assignee

City University of Hong Kong

Inventors

Xin Chen, Chi Kong Tse

Abstract

The present invention provides a wireless soft-switching in-wheel motor drive system and a method for realizing the same. The method comprises pre-misaligning the primary winding and the secondary winding of a magnetic coupler of the in-wheel motor drive system for an angular offset such that an input impedance of the resonant compensation network of the in-wheel motor drive system has a short-circuit boundary frequency less than an open-circuit boundary frequency throughout a target misalignment tolerance between the primary winding and the secondary winding. The present invention can ensure soft switching of the in-wheel motor drive system, save system volume, minimize power losses, and achieve high efficiency.