Rotating Electric Machine Rotor Positioning
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Solution Overview
Problem
Conventional rotating electric machines lack precise positioning of rotor portions due to their contact-based connection, which neglects the gap positioning between these components.
Innovation Solution
A rotating electric machine design featuring a first and second rotor portion with annular and extending portions, along with positioning members in specific gaps to accurately position these components in the circumferential and extending directions, enhancing the machine's structural integrity and positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotor is composed of two members (first rotor portion and second rotor portion) arranged with a gap, then the magnetic flux distribution and heat management are improved, but the positioning accuracy between the two rotor portions deteriorates
Solution Approach 1:
A positioning member is introduced as an intermediary component between the first rotor portion and the second rotor portion. This positioning member fills the gap between the two rotor portions and provides precise positioning in both the circumferential direction and the extending direction, thereby maintaining manufacturing precision while allowing the beneficial gap configuration for magnetic flux distribution and heat management
Solution Approach 2:
The rotor is segmented into two separate rotor portions (first rotor portion and second rotor portion) with a gap between them, rather than being a single continuous structure. This segmentation improves magnetic flux distribution and heat management, and the positioning member ensures accurate relative positioning of the segmented portions
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 allows for more precise positioning of rotor portions, improving the rotational strength and stability of the electric machine, while effectively utilizing the available space within the rotor for better magnetic flux distribution and heat management.
Implementation Method 1
a field coil fixed to the non-rotating member, disposed on an inner diameter side of the stator, and having an iron core and a winding wound around the iron core
Implementation Method 2
a rotor rotatably disposed between the stator and the field coil, wherein the rotor includes a first rotor portion and a second rotor portion respectively arranged along an extending direction of a rotary shaft of the rotor
Data Source
AI summary
A rotating electric machine includes a non-rotating member, a stator fixed to the non-rotating member, a field coil fixed to the non-rotating member, disposed on an inner diameter side of the stator, and having an iron core and a winding wound around the iron core, and a rotor rotatably disposed between the stator and the field coil. The rotor includes a first rotor portion and a second rotor portion. The rotating electric machine further comprises a positioning member disposed in each of the first gap, the second gap, and the third gap to position each of the first rotor portion and the second rotor portion in the circumferential direction and the extending direction.