Magnet Generator Uniform Salient Pole Arrangement
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Solution Overview
Problem
Magnet generators for motorcycles face challenges in increasing power generation efficiency while maintaining manufacturing efficiency, often resulting in reduced power generation due to imbalanced salient pole arrangements and increased system costs.
Innovation Solution
A magnet generator design with uniformly arranged salient poles, where each magnetic path portion has the same arrangement angle, and protrusions are strategically placed to match the pole arc angle of permanent magnets, ensuring balanced power generation and efficient coil winding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the number of salient poles is increased to secure power generation amount, then power generation efficiency is improved, but voltage regulator cost increases and system complexity increases
Solution Approach 1:
The patent changes the arrangement angle parameter of salient poles to match the pole arc angle of permanent magnets. This parameter adjustment enables effective power generation with fewer magnetic poles (16 poles), allowing the use of inexpensive thyristor type voltage regulators instead of expensive FET type regulators, thus resolving the contradiction between power generation amount and voltage regulator cost/complexity
2Device complexity
If the number of salient poles is reduced, then system cost is reduced, but power generation amount is reduced
Solution Approach 1:
The patent optimizes the arrangement angle parameter of salient poles to match the pole arc angle of permanent magnets. This parameter optimization enables the system to achieve sufficient power generation with reduced number of magnetic poles (16 poles), thereby reducing system cost while maintaining adequate power generation amount
3Power
If intervals between neighboring salient poles are made unequal, then power generation amount is improved, but manufacturing efficiency is reduced
Solution Approach 1:
The patent applies homogeneity by making all intervals between neighboring salient poles equal. This uniform arrangement simplifies the coil winding process, allowing consistent winding speed and procedures across all poles, thereby maintaining manufacturing efficiency while achieving adequate power generation through optimized pole arrangement angles
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 design enhances power generation efficiency by preventing power generation balance collapse between phases and maintains manufacturing efficiency by allowing uniform coil winding, reducing system costs and increasing power output.
Implementation Method 1
The magnet generator causes the rotor to be rotated and driven by, for instance, an engine. Thereby, a rotating magnetic field formed by the permanent magnets cuts across the coils, and electromotive force is generated at the stator side.
Data Source
Figure 1
Figure 2
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AI summary
This magnet generator (1) includes a stator having a plurality of salient poles (14), each of which is configured of a magnetic path portion (15) around which a coil is wound and a protrusion (16) protruding from a tip of the magnetic path portion (15), and a rotor (2) having a plurality of permanent magnets (6) attached to be opposite to the salient poles (14). The salient poles (14) are configured such that each of the magnetic path portions has an approximately same arrangement angle between the adjacent magnetic path portions. Distal ends (17) configured of distal end parts of the magnetic path portion (15) and the protrusions (16) are set such that an arrangement angle between the distal ends (17) that are in phase is set to be same as a pole arc angle of each of the permanent magnets (6).