Thin Axial Gap Motor Without Back Iron
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Solution Overview
Problem
Existing thin motor designs face challenges in reducing thickness while maintaining efficiency, as they require complex manufacturing processes and high costs, particularly in applications like fan motors and heat dissipating structures.
Innovation Solution
A thin axial gap motor design featuring a stator module with flat permeable frames and windings arranged around support arms, a rotor module with a flat permanent magnet, and a pivoting element that reduces the motor's overall height by positioning the winding outside the magnet and eliminating the need for back iron, allowing for a compact and efficient structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a flexible circuit board coil assembly is used to reduce motor thickness, then the axial height is reduced, but the manufacturing process and assembly become complicated and cost increases
Solution Approach 1:
The invention extracts and eliminates the back iron component from the motor structure. By removing this traditional component and repositioning the winding outside the magnet, the design achieves reduced axial height without requiring complex flexible circuit board assemblies, thereby simplifying manufacturing while maintaining the thin profile
Solution Approach 2:
The invention changes the spatial arrangement by positioning the winding in the radial direction outside the magnet rather than in the axial direction. This dimensional repositioning allows the elimination of back iron and reduces axial height without complicating the manufacturing process
2Length of stationary object
If traditional motor structure with back iron is used, then structural strength is maintained, but motor height increases
Solution Approach 1:
The invention extracts and eliminates the back iron component from the motor structure. By removing this traditional component and repositioning the winding outside the magnet, the design achieves reduced axial height without requiring complex flexible circuit board assemblies, thereby simplifying manufacturing while maintaining the thin profile
Solution Approach 2:
The stator yoke in the invention serves multiple functions: it provides structural support, guides magnetic flux, and maintains mechanical integrity without requiring separate back iron components. This multi-functional design reduces overall height while maintaining necessary structural strength
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 design achieves a reduced motor height, simplifies manufacturing, and eliminates the need for back iron, resulting in a more cost-effective and efficient thin motor suitable for applications in electronic devices.
Implementation Method 1
Most electric motors generate energy in an electric machine through magnetic field and winding current
Implementation Method 2
the at least one winding being situated on an external side of the permanent magnet
Implementation Method 3
a stator module, including at least one flat permeable frame and at least one winding
Implementation Method 4
a rotor module, including a flat permanent magnet installed at the top of the plurality of induced magnetic parts
Data Source
AI summary
A thin axial gap motor includes: a base, a circuit unit installed on the base; a stator module including at least one flat permeable frame and at least one winding, and the permeable frame having at least one support arm and an induced magnetic part connected to the at least one support arm, and the winding being wound around the support arm; a rotor module including a flat permanent magnet installed at the top of the induced magnetic parts and having an orthographic projection range corresponsive to the area of the induced magnetic part, and the at least one winding being disposed on an outer side of the permanent magnet; and a pivoting element installed between the base and the rotor module and including a bearing housing and a spindle plugged into the bearing housing for rotating the rotor module with respect to the base.