Disk-Type BLDC Motor Radial Flux Torque Optimization
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Solution Overview
Problem
Conventional cylinder-type radial flux motors in electrically driven vehicles face challenges in providing high torque without significantly reducing the vehicle's range, as they require increased electrical power input for enhanced torque, leading to higher electricity consumption and shorter vehicle range when high torque is needed for tasks like carrying heavy loads or climbing slopes.
Innovation Solution
A disk-type BLDC motor with a radial flux configuration, utilizing a single-phase control scheme, specific NdFeB permanent magnets with dual-peak magnetic flux density, and advanced air gap geometries to enhance torque production while minimizing power consumption, featuring a stator core design with optimized magnetic flux distribution and a rotor configuration that maintains efficient operation and reduces heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional cylinder type radial flux motors operate with high input electrical power to enhance output torque, then the torque capability is improved, but electricity consumption increases and vehicle range is shortened
Solution Approach 1:
The patent changes the fundamental geometric parameters of the motor from a cylinder type to a disk type configuration. This parameter change fundamentally alters the magnetic flux distribution and torque generation characteristics, enabling high torque output with optimized energy efficiency. The disk type structure with its large diameter and thin axial dimension creates a different electromagnetic field distribution that improves the torque-to-power ratio.
Solution Approach 2:
The patent transitions from a conventional cylindrical motor geometry to a disk-type geometry, effectively changing the dimensional characteristics. The disk type motor has a large radial dimension (diameter) and a small axial dimension, which fundamentally changes the magnetic flux path and torque generation mechanism. This dimensional change allows for more efficient utilization of the magnetic field and reduced energy consumption for the same torque output.
2Force
If conventional cylinder type radial flux motors operate with high input electrical power to enhance output torque, then the torque capability is improved, but vehicle range is shortened
Solution Approach 1:
The patent changes the fundamental geometric parameters of the motor from a cylinder type to a disk type configuration. This parameter change fundamentally alters the magnetic flux distribution and torque generation characteristics, enabling high torque output with optimized energy efficiency. The disk type structure with its large diameter and thin axial dimension creates a different electromagnetic field distribution that improves the torque-to-power ratio.
Solution Approach 2:
The patent transitions from a conventional cylindrical motor geometry to a disk-type geometry, effectively changing the dimensional characteristics. The disk type motor has a large radial dimension (diameter) and a small axial dimension, which fundamentally changes the magnetic flux path and torque generation mechanism. This dimensional change allows for more efficient utilization of the magnetic field and reduced energy consumption for the same torque output.
3Force
If disk type BLDC motor uses specific NdFeB permanent magnets with dual-peak magnetic flux density and advanced air gap geometries, then torque production is enhanced, but device complexity increases
Solution Approach 1:
The patent applies local quality by creating dual-peak magnetic flux density regions in specific locations of the NdFeB permanent magnets. Rather than uniform magnetization, the magnets are designed with localized high-flux regions that correspond to the air gap geometries. This localized optimization of magnetic properties enhances torque production at critical positions without requiring complex control systems or additional components throughout the entire motor structure.
Solution Approach 2:
The patent employs advanced air gap geometries with curved and non-uniform profiles between the stator and rotor. These curved geometries are designed to work in conjunction with the dual-peak magnet configurations, creating optimized magnetic flux paths that enhance torque production. The curvature of the air gap surfaces is specifically shaped to concentrate and direct the magnetic flux for maximum torque efficiency.
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
The disk-type BLDC motor achieves high torque output with improved power efficiency, reducing electricity consumption and extending vehicle range by optimizing magnetic flux and air gap geometries, and maintaining performance under high temperatures.
Implementation Method 1
specific NdFeB permanent magnets with dual-peak magnetic flux density
Implementation Method 2
disk-type BLDC motor with a radial flux configuration
Implementation Method 3
optimized magnetic flux distribution and a rotor configuration
Data Source
AI summary
The present disclosure relates to a disk-type brushless direct current (BLDC) motor, which comprises a magnetic rotor and a stator. The magnetic rotor is provided with a rim and a plurality of equally spaced magnetic poles around the rim in circumferential direction. The stator is provided with a stator core having tooth portions and boot portions and a plurality of coil windings wrapped around the tooth portions. The stator is disposed radially in relation to the magnetic rotor such that the magnetic poles are radially polarized to produce radial magnetic flux density, and the magnetic flux density is substantially higher at both edges than middle portion of each magnetic pole in the circumferential direction.