A moving-magnet planar motor with a hybrid arrangement of coreless coils and permanent magnets

By using a hybrid arrangement of coreless coils and permanent magnets in an alternating array, combined with passive levitation and wireless power transmission, the problems of coil work, falling off when power is off, and high power consumption in existing planar motors are solved. This achieves structural simplification, reduced power consumption, self-holding levitation when power is off, and unlimited stroke motion, thereby improving motion accuracy and reducing costs.

CN122315977APending Publication Date: 2026-06-30BANJI INTELLIGENT TECHNOLOGY (SUZHOU) CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-03
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing planar motors have problems such as the coil needing to lift the mover to do work, falling off after power failure, high power consumption, and the mover power supply cable of moving-coil planar motors limiting the range of motion.

Method used

It adopts a hybrid arrangement of coreless coils and permanent magnets in an alternating array, combined with passive levitation and wireless power transmission. The passive levitation and drive of the mover are achieved through Hall sensor array and controller. The mover does not need to be dragged by cables and adopts wireless charging mode switching and edge drive.

Benefits of technology

It achieves structural simplification, reduced power consumption, self-sustaining levitation of the mover after power failure, wireless power transmission, unlimited travel motion, and improved motion accuracy, while reducing manufacturing difficulty and cost.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122315977A_ABST
    Figure CN122315977A_ABST
Patent Text Reader

Abstract

This invention discloses a planar motor with a hybrid arrangement of coreless coils and permanent magnets, comprising a stator, a mover, a Hall sensor array, and a controller. The permanent magnet array and the coreless coil array on the stator surface are arranged on the same plane in an alternating array. The mover structure, from the center outwards, consists of a wireless energy receiving coil, an inner ring magnet, and an outer ring magnet, achieving passive levitation through a balance of attraction and repulsion. The controller calculates the mover position using a Hall fingerprint positioning algorithm and only powers the stator edge coil group corresponding to the mover's edge magnets. When the coils on the mover overlap with the stator coils, it switches to wireless energy transmission mode to provide power to the mover. This invention enables the product to achieve self-levitation, low-power edge drive, and wireless power supply when power is off, making it suitable for various application scenarios.
Need to check novelty before this filing date? Find Prior Art