Magnetic Geared Rotor Structure for Lower Stator Magnet Loss
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Solution Overview
Problem
Existing magnetic geared rotating machines face challenges in reducing stator magnet losses, which are not addressed by conventional configurations.
Innovation Solution
The magnetic geared rotating machine incorporates a stator with aligned stator magnets, a rotor with fewer magnetic poles, and a magnetic pole piece rotor with specific face lengths and arrangements to minimize leakage magnetic flux and eddy currents, thereby reducing stator magnet losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a stator magnet is provided in the stator to increase transmission torque, then the transmission torque is improved, but stator magnet losses increase during operation
Solution Approach 1:
A magnetic pole piece rotor is introduced as an intermediary component between the rotor and stator. This magnetic pole piece rotor includes magnetic pole pieces that modulate the magnetic flux from the rotor magnets, enabling the stator magnets to generate torque while reducing direct magnetic flux leakage and eddy currents in the stator magnets, thereby reducing stator magnet losses
Solution Approach 2:
The invention changes the magnetic pole configuration parameters by having the magnetic pole pieces rotor with a number of magnetic poles different from both the rotor magnets and stator magnets. This parameter change creates a magnetic gear effect that optimizes flux distribution, allowing torque generation while minimizing losses in the stator magnets
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively reduces stator magnet losses, enhancing the efficiency and performance of the magnetic geared rotating machine by minimizing eddy currents and maintaining output torque.
Implementation Method 1
a magnetic pole piece rotor (30) which includes a plurality of magnetic pole pieces (32) arranged so as to be aligned in the circumferential direction
Implementation Method 2
capable of reducing stator magnet losses in a stator magnet
Implementation Method 3
a magnetic geared rotating machine (10) includes a stator (20) which includes a plurality of stator magnets (22) arranged so as to be aligned in a circumferential direction; a rotor (40) which includes a plurality of rotor magnets (42) arranged so as to be aligned in the circumferential direction
Data Source
AI summary
A magnetic geared rotating machine, includes: a stator which includes a plurality of stator magnets arranged so as to be aligned in a circumferential direction; a rotor which includes a plurality of rotor magnets arranged so as to be aligned in the circumferential direction, and in which the number of magnetic poles of the plurality of rotor magnets is less than the number of magnetic poles of the plurality of stator magnets; and a magnetic pole piece rotor which includes a plurality of magnetic pole pieces arranged so as to be aligned in the circumferential direction. Each of the magnetic pole pieces has: a first face opposed to the rotor in a radial direction; and a second face opposed to the stator in the radial direction and having a circumferential length longer than a circumferential length of the first face.