Segmented Motor Units for Flexible Pole Configuration
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Solution Overview
Problem
In motors employing the Lundell structure rotor, changing the number of poles in the stator requires significant modifications to the stator core shape and winding, making it difficult to adapt to changes in the number of poles without compromising performance.
Innovation Solution
A motor design featuring multiple motor units with rotors and stators arranged in an axial direction, where each rotor and stator unit has claw magnetic poles that can be easily adjusted in number and configuration to change the magnetic pole count, allowing for independent operation and high output without drastic design changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of poles in the stator is changed in a motor employing the Lundell structure rotor, then the adaptability to different pole configurations is improved, but the stator core shape and winding structure must be significantly modified, increasing device complexity and manufacturing difficulty
Solution Approach 1:
The stator is divided into multiple independent motor units (first motor unit, second motor unit, third motor unit), each with its own stator core and winding. This segmentation allows each unit to be independently configured for different pole numbers while maintaining the overall motor structure. The rotor is similarly segmented into multiple rotor units that can be independently arranged.
Solution Approach 2:
Multiple motor units are arranged in the axial direction (adding a dimensional aspect) rather than changing the planar configuration of a single stator. This allows pole number changes to be achieved by selecting different combinations of axial units rather than redesigning the entire stator core and winding structure.
2Adaptability or versatility
If the number of poles is changed in the rotor of a Lundell structure motor, then the adaptability is improved, but the stator core shape and winding must be changed, increasing manufacturing complexity
Solution Approach 1:
The motor is segmented into multiple independent units, each with standardized stator and rotor components. This allows the rotor pole configuration to be changed by selecting different rotor units without requiring modifications to the stator core or winding of other units, significantly easing manufacturing.
Solution Approach 2:
The stator units are designed with universal compatibility to work with different rotor configurations. The standardized stator core and winding design can accommodate multiple rotor pole numbers, reducing the need for custom manufacturing when pole numbers change.
3Power
If multiple motor units are arranged in the axial direction, then the output and adaptability are improved, but the axial length of the motor increases
Solution Approach 1:
Multiple motor units are nested or stacked in the axial direction, with each unit contributing to the total output. This allows the motor to achieve high power output by combining multiple smaller units rather than requiring a single large unit, optimizing the axial space utilization.
Solution Approach 2:
Multiple motor units are merged into a single integrated motor structure, sharing common components such as the housing, mounting flanges, and control systems. This reduces the overall axial length compared to having separate motors, while maintaining the cumulative output of all units.
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
Enables flexible adjustment of magnetic pole count in both rotor and stator units, enhancing adaptability and output while maintaining a compact axial design, thus improving motor efficiency and adaptability to varying specifications.
Implementation Method 1
A field magnet is arranged between the first and second rotor cores. The field magnet is magnetized along the axial direction so that the plurality of first claw magnetic poles and the plurality of second claw magnetic poles function as different magnetic poles.
Implementation Method 2
Each of the first stator, the second stator, and the third stator includes a first stator core including a plurality of first claw magnetic poles arranged at equal intervals along the circumferential direction, a second stator core including a plurality of second claw magnetic poles arranged at equal intervals along the circumferential direction, and a coil section arranged between the first and second stator cores and wound along the circumferential direction of the motor. When the coil section is supplied with power, the plurality of first claw magnetic poles of the first stator core and the plurality of second claw magnetic poles of the second stator core become different magnetic poles and so that polarities thereof are switched.
Data Source
AI summary
A motor includes a first, second, and third motor unit. First, second and third rotors each including a first and second rotor core and a field magnet. The first and second rotor cores include respectively first and second rotor core bases and a plurality of first and second claw magnetic poles that are arranged alternately along a circumferential direction of the motor. The field magnet causes the plurality of first claw magnetic poles and the plurality of second claw magnetic poles to function as different magnetic poles. Each of first and second stators including pluralities of first claw magnetic poles and second claw magnetic poles alternately arranged along the circumferential direction of the motor. The second stator core having a coil section.