Rotors and rotating electric machines
The rotor design with a flux barrier band and rotating second rotor optimizes magnetic flux without large currents, addressing inefficiencies in permanent magnet motors, enhancing efficiency across torque and speed regions.
JP2026093382APending Publication Date: 2026-06-08KK TOSHIBA
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- KK TOSHIBA
- Filing Date
- 2025-11-27
- Publication Date
- 2026-06-08
AI Technical Summary
Technical Problem
Permanent magnet motors face inefficiencies due to increased copper loss and iron loss during field weakening control, and require large currents to change magnetization, which challenges high efficiency in both high torque and high speed regions.
Method used
A rotor design with a flux barrier band and a second rotor that can rotate relative to the first rotor, changing magnetic path and properties without large stator currents, using non-magnetic regions and bridges to manage magnetic flux.
Benefits of technology
Enables efficient magnetic property changes without large currents, improving efficiency across torque and speed regions by optimizing flux linkage.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 2026093382000001_ABST
Abstract
The magnetic properties of the rotor can be changed without requiring a large current in the stator windings. [Solution] According to the first embodiment, the rotor 100 includes a first rotor core 120 having a flux barrier band in which non-magnetic regions and bridges are continuously arranged in a convex shape toward the first rotation axis CL when viewed with respect to one magnetic pole 80p sandwiched between two q axes, a first rotor 100 having a plurality of first rotor magnets 130, 140 arranged within the flux barrier band so as to sandwich the d axis, and a second rotor 210 provided within the flux barrier band so as to be able to rotate relative to the first rotor 100 around the second rotation axis CX. The magnetic path within the first rotor 100 changes as the rotation angle of the second rotor 210 changes.
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