Compact Dynamo Motor with Integrated Speed Converter
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Solution Overview
Problem
Conventional infinitely variable speed converters with multiple dynamo/motors arranged to rotate reversely require significant space, making it difficult to compactify and thin the motor structure, leading to increased size and maintenance requirements, and inefficient energy consumption due to rapid speed changes.
Innovation Solution
A dynamo/motor with a built-in speed converter featuring a stator with annularly disposed permanent or electromagnets and rotors rotating in opposite directions, where a traction roller or gear inserted through a drive shaft comes into contact with the rotors' drive disks or gears, allowing for torque output and compactification by integrating the speed converter within a single motor unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple independent dynamo/motors are used to form an infinitely variable speed converter, then speed conversion functionality is achieved, but the device occupies significant space (about 50 cm or more in thickness)
Solution Approach 1:
The patent merges the speed conversion mechanism with the dynamo/motor structure by integrating the traction roller and drive disks into a single unified unit. The drive disks are formed as side plates of the rotor, and the traction roller is positioned within the motor structure, allowing speed conversion to occur within the existing motor footprint rather than requiring separate independent motors stacked together.
Solution Approach 2:
The traction roller is nested within the space between the drive disks that are themselves part of the rotor structure. The drive shaft penetrates through the traction roller, which is positioned in the gap between the two drive disks, creating a compact nested arrangement where the speed conversion mechanism is contained within the motor's existing structural envelope.
2Adaptability or versatility
If multiple independent dynamo/motors are arranged to rotate reversely, then an infinitely variable speed converter is formed, but the overall device complexity and maintenance requirements increase
Solution Approach 1:
The patent combines multiple functional elements into a single integrated unit: the stator, rotor, drive disks, and traction roller all form one unified motor assembly. This eliminates the need for multiple independent motor units while maintaining the infinitely variable speed conversion capability through the interaction between the drive disks rotating in opposite directions and the traction roller.
3Productivity
If conventional speed conversion mechanisms are added to dynamo/motors, then speed control is improved, but the air gap between magnets increases reducing motor efficiency
Solution Approach 1:
The patent places the traction roller in the axial dimension between the drive disks, rather than increasing the radial air gap. This allows speed conversion to occur along the axial direction while maintaining the original radial magnetic circuit path and air gap dimensions, preserving motor efficiency while achieving variable speed control.
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 enables significant compactification and reduced maintenance needs, maintaining proper air gaps between magnets, and allows for efficient energy use by enabling rapid speed changes without increasing the motor's thickness, thus addressing the size and energy efficiency issues of conventional systems.
Implementation Method 1
the traction roller comes into contact with the drive disk to be subject to a couple and thereby to rotate
Implementation Method 2
the traction gear comes into contact with the drive gear to be subject to a couple and thereby to rotate
Implementation Method 3
for a stator formed by annularly disposing permanent magnets or electromagnets as field magnets
Implementation Method 4
permanent magnets or electromagnets as field magnets
Data Source
AI summary
An infinitely variable speed converter having at least two dynamo/motors, to reduce the thickness in the direction of the central shaft. A space is provided in a portion surrounded by a rotor arranged to rotate clockwise with either a drive disk or a drive gear, a rotor arranged to rotate counterclockwise with either a drive disk or a drive gear, and a radial interior of a stator formed by annularly disposing field magnets. When a traction roller or a traction gear penetrated by a drive shaft is inserted into the provided space, contacting the drive disk to be subject to a couple and thereby rotating while the traction gear comes into contact with the drive gear, whereby an output can be provided to the drive shaft that penetrates the traction roller or the traction gear, so that the entire structure can be compactified.