Rotor and rotary electric machine
The rotor design with a flux barrier band and adjustable second rotor improves motor efficiency by dynamically altering magnetic flux, addressing efficiency challenges in permanent magnet motors.
WO2026116447A1PCT designated stage Publication Date: 2026-06-04KK TOSHIBA
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- KK TOSHIBA
- Filing Date
- 2025-11-27
- Publication Date
- 2026-06-04
AI Technical Summary
Technical Problem
Permanent magnet motors face efficiency challenges due to increased copper and iron losses from flux weakening control, and require high current for variable flux motors, which strain inverter capacity.
Method used
A rotor design with a flux barrier band and a second rotor that changes magnetic path through rotation, altering magnetic properties without large stator currents, using a second rotor core and magnets to adjust flux linkage based on speed.
Benefits of technology
Enhances motor efficiency across torque and speed ranges by dynamically adjusting magnetic flux, reducing copper and iron losses, and avoiding high stator current demands.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure JP2025041470_04062026_PF_FP_ABST
Abstract
According to an embodiment of the present invention, a rotor (100) comprises: a first rotor (110) having a first rotor shaft (111), a first rotor core (112) that includes a flux barrier band, and a plurality of first rotor magnets (113) arranged within the flux barrier band; a second rotor (130) having a second rotor shaft (131) which extends in the axial direction and of which a second rotation axis CX is arranged within the flux barrier band, and a second rotor core (132) attached to the second rotor shaft (131); and an elastic body that generates rotation torque corresponding to the rotation of the second rotor (130).
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