Counter-rotating dual rotor electric machine design
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Solution Overview
Problem
Existing electric machines require high mechanical energy input to achieve high angular speed, leading to increased resource expenditure and complexity in control, while being bulky and voluminous, thus limiting their efficiency and ease of installation.
Innovation Solution
An electric machine design featuring a frame with a first and second member that cooperate to generate an electromagnetic field, where both members are rotatable in opposite directions, utilizing a return mechanism with transmission members to achieve higher relative speed and efficiency, allowing for greater electromotive force and reduced coil usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high angular speed is achieved in conventional electric machines, then electric power output increases, but mechanical energy input and resource expenditure increase significantly
Solution Approach 1:
The patent combines two rotors (first rotor and second rotor) into a single integrated structure that rotates in opposite directions. This dual-rotor configuration allows the machine to generate electromagnetic field interactions from both rotors simultaneously, increasing power output without proportionally increasing mechanical energy input to each individual rotor.
Solution Approach 2:
The invention introduces dynamic counter-rotation where the second rotor rotates in the opposite direction to the first rotor. This dynamic configuration creates relative motion between the rotors that enhances electromagnetic induction efficiency, allowing higher power output with optimized energy input distribution.
2Power
If high angular speed is achieved in conventional electric machines, then electric power output increases, but control complexity increases
Solution Approach 1:
By integrating the control of both rotors into a unified dual-rotor system, the patent reduces overall control complexity compared to managing separate high-speed rotors. The counter-rotating configuration allows for balanced electromagnetic interactions that simplify control algorithms while maintaining high power output.
3Power
If conventional electric machines are designed for high power output, then electric power capacity increases, but machine size and volume increase
Solution Approach 1:
The patent places the second rotor inside or concentric with the first rotor, creating a nested dual-rotor structure. This nesting allows both rotors to occupy the same radial space, effectively doubling the power-generating components within approximately the same outer dimensions, thus increasing power capacity without proportionally increasing machine volume.
Solution Approach 2:
The invention utilizes the radial dimension by implementing counter-rotating rotors at different radial positions. This dimensional arrangement allows efficient use of space, enabling high power output from a compact volume by exploiting the radial space within the stator bore.
4Power
If conventional electric machines are designed for high power output, then electric power capacity increases, but installation difficulty increases
Solution Approach 1:
The nested dual-rotor configuration creates a more compact overall machine size with reduced external dimensions, making the high-power machine easier to install in existing facilities with limited space. The concentric arrangement of rotors minimizes the radial and axial footprint of the machine.
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 efficiency by achieving higher electromotive force with the same mechanical energy input, reduces machine size and production costs, and simplifies installation in existing plants, while maintaining or exceeding the electric power output of conventional machines.
Implementation Method 1
During rotation, the electric machine generates a rotating magnetic field, which induces an electromotive force (emf) on the electric coils
Implementation Method 2
electric machine for converting mechanical energy into electric energy
Data Source
Figure 1~2
Figure 3~7
AI summary
Electric machine (10) to convert mechanical energy into electric energy, comprising a first member (13) and a second member (14) configured to cooperate with each other to generate an electromagnetic field, one of either the first member (13) or the second member (14) comprising electric coils (15) and the other of either the first member (13) or the second member (14) comprising at least an electromagnet and/or at least a permanent magnet (16).