Outer Rotor Motor Axial Magnetic Member Extension
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Solution Overview
Problem
Existing outer rotor type motors face challenges in increasing torque without enlarging their size, which leads to increased space occupation and installation difficulties due to the need for radially enlarged magnetic members.
Innovation Solution
The motor design includes a rotating unit with outer and inner magnetic members and windings that are lengthened axially, allowing for increased magnetic forces and torque without radial expansion, utilizing a rotating unit with a base wall, inner and outer surrounding walls, and spools to maintain a compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the first and second magnetic members are enlarged in a direction perpendicular to the motor axis to increase torque, then the torque is improved, but the size of the motor is increased
Solution Approach 1:
The patent transitions from radial enlargement (perpendicular to motor axis) to axial enlargement (parallel to motor axis) to increase the effective area of magnetic members. The outer magnetic members and inner magnetic members are extended in the axial direction, allowing increased torque without increasing the radial footprint of the motor, thus resolving the contradiction between torque and motor size.
2Force
If the magnetic members are radially enlarged to increase torque, then the torque output is improved, but the installation difficulty increases due to increased space occupation
Solution Approach 1:
The patent extends magnetic members in the axial dimension rather than the radial dimension. This allows the motor to achieve higher torque output while maintaining a compact radial profile, making the motor easier to install in spaces with limited radial clearance while still providing sufficient torque.
3Force
If the magnetic members are enlarged radially to increase torque, then the magnetic force is improved, but the space occupation is increased
Solution Approach 1:
The patent increases the axial length of outer magnetic members and inner magnetic members to enhance magnetic force. This axial extension provides greater magnetic interaction area without increasing the radial space occupation, allowing the motor to generate stronger magnetic forces while occupying less horizontal space.
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 torque output without increasing the motor's size, saving space and simplifying installation, as the axial lengthening of magnetic members and windings generates greater magnetic forces without radial expansion.
Implementation Method 1
When the windings are energized to produce a magnetic field
Implementation Method 2
the inner and outer magnetic members are rotated by magnetic forces about the stationary shaft
Data Source
AI summary
An outer rotor type motor includes a rotating unit and a fixing unit. The rotating unit includes an inner surrounding wall surrounding a stationary shaft of the fixing unit and an outer surrounding wall surrounding the inner surrounding wall. A spool support is connected to the stationary shaft. Spools are connected to the spool support, surround the stationary shaft and are wound by windings. Outer magnetic members are disposed on the outer surrounding wall. Inner magnetic members are disposed on the inner surrounding wall. When the windings are energized, the inner and outer magnetic members are rotated about the stationary shaft so that the rotating unit is rotated relative to the fixing unit.