Halbach Array Permanent Magnet Generator for Vehicle Energy Supply
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Solution Overview
Problem
Existing generator devices with permanent magnets for vehicles face challenges in achieving high energy output and efficiency while maintaining compact dimensions, leading to increased fuel consumption and energy dissipation due to large stator windings and overall dimensions.
Innovation Solution
The generator device employs a Halbach array configuration for the permanent magnets, enhancing magnetic field flow to the stator while reducing it to the rotor, resulting in increased magnetic induction to the air gap and reduced stator thickness, thus minimizing losses and overall dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the stator windings are made larger to achieve desired magnetic induction values, then the magnetic induction to the stator element is improved, but the device dimensions and energy dissipation increase
Solution Approach 1:
The patent changes the magnetic field distribution parameters by using a Halbach array configuration for the permanent magnets. This configuration alters the magnetic induction values at different locations, providing enhanced magnetic induction to the stator element without requiring larger stator windings or increased device dimensions.
2Power
If the stator windings are made larger to achieve desired magnetic induction values, then the magnetic induction to the stator element is improved, but the energy dissipation due to Joule effect increases
Solution Approach 1:
The Halbach array configuration changes the magnetic field parameters to provide more efficient magnetic coupling. This results in better magnetic induction with the existing stator windings, reducing the need for larger windings and consequently reducing Joule effect energy dissipation.
3Power
If the overall dimensions of the generator are increased to improve performance, then the energy output is improved, but the device compactness deteriorates
Solution Approach 1:
The patent employs the Halbach array configuration to optimize the magnetic field distribution parameters, which enhances the magnetic coupling efficiency between the rotor and stator. This allows the device to achieve higher energy output within compact dimensions, maintaining device compactness while improving performance.
4Stability of the object's composition
If the permanent magnets are arranged in classic North-South alternate polarity configuration, then the magnetic field flow is distributed evenly, but the magnetic induction to the air gap is reduced
Solution Approach 1:
The patent applies asymmetry by using the Halbach array configuration, which creates an asymmetric magnetic field distribution pattern. This asymmetric arrangement concentrates the magnetic field flow in a specific direction, enhancing the magnetic induction to the air gap and stator element while maintaining stable magnetic coupling.
Solution Approach 2:
The Halbach array configuration provides different magnetic field qualities at different locations. The magnetic induction is enhanced locally at the air gap and stator element interfaces, while the overall magnetic field distribution remains stable and controlled.
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 enhances performance by reducing electrical resistance and Joule effect losses, leading to increased efficiency and reduced fuel consumption without increasing the device's outer dimensions.
Implementation Method 1
The device comprises a rotor element rotating around an axis of rotation; a stator element contained inside the rotor element, or containing the rotor element, coaxial to the rotor element and having a plurality of stator slots; a plurality of stator windings made of a conductive material arranged at each of the stator slots and connected to a power supply line; a plurality of permanent magnets having a first side associated with the rotor element and a second side facing the stator element
Implementation Method 2
The permanent magnets are associated with the rotor element in a configuration of the Halbach array type to define a magnetic coupling to the stator windings wherein the flow of the magnetic field at the second side of each of the permanent magnets is substantially greater than the flow of the magnetic field at the first side of each of the permanent magnets
Data Source
AI summary
The generator device of electrical energy with permanent magnets, particularly for the supply of electrical loads and/or batteries of vehicles, connectable to at least a driving shaft of a motor, comprises: a rotor element rotating around an axis of rotation; a stator element contained inside the rotor element, or containing the rotor element, and coaxial to the rotor element, the stator element having a plurality of stator slots; a plurality of stator windings of a conductive material arranged at each of the stator slots and connected to a power supply line; a plurality of permanent magnets having a first side associated with the rotor element and a second side facing the stator element; wherein the permanent magnets are associated with the rotor element in a configuration of the Halbach array type to define a magnetic coupling to the stator windings wherein the magnetic field flow at the second side of each of the permanent magnets is substantially greater than the flow of the magnetic field at the first side of each of the permanent magnets.