Electric Motor Sub-Coil Winding for Higher Torque and Redundancy
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Solution Overview
Problem
Conventional electric motors face limitations in power density due to the oppositional flow of electric current, which restricts torque and speed, and increasing power supply voltage requires additional complex and costly components, leading to inefficiencies.
Innovation Solution
A novel winding arrangement that subdivides the phase into sub-coils with evenly distributed electrical connections in series or parallel sets, reducing voltage, resistance, and inductance, allowing for independent control of sub-coils and using smaller, faster silicon switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional winding arrangement is used, then motor structure is simple, but power density is limited due to current opposition flow
Solution Approach 1:
The patent divides each phase winding into multiple sub-coils (first sub-coil and second sub-coil) that are independently controllable. This segmentation allows the current to flow through different paths, eliminating the oppositional flow limitation and enabling higher power density without proportionally increasing structural complexity.
2Power
If power supply voltage is increased to overcome current limitations, then torque and speed increase, but additional complex and costly components are required
Solution Approach 1:
The patent implements dynamic control of sub-coil connections through switching elements (such as MOSFETs or IGBTs) that can rapidly change the connection configuration between sub-coils. This dynamic reconfiguration allows the motor to achieve higher torque and speed by optimizing current distribution, replacing the need for static voltage increase with active control mechanisms.
3Reliability
If conventional single current path per phase is used, then structure is simple, but redundancy is absent and any failure causes full phase failure
Solution Approach 1:
By segmenting each phase into multiple sub-coils with independent current paths, the patent creates inherent redundancy. If one sub-coil or its current path fails, the other sub-coils can continue to operate, maintaining partial phase functionality and preventing complete system failure, thus improving reliability without excessive complexity.
Solution Approach 2:
The patent changes the electrical parameter configuration by allowing independent control of sub-coil connections (series, parallel, or mixed configurations). This parameter flexibility enables the system to adapt to failure conditions and maintain operation, providing redundancy through configurable current paths rather than fixed single-path architecture.
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 approach enhances motor performance by increasing torque and speed, achieving higher power density without additional components, reduces size and cost, and provides redundancy to maintain operation even with component failures.
Implementation Method 1
The invention provides an electric motor in which the electromagnetic properties of it have been improved by a novel winding arrangement
Implementation Method 2
This makes it possible to increase the motor performance by extending its torque and speed to higher levels
Data Source
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AI summary
An electric motor and winding method that improves its characteristics of torque and speed. An improved electric motor that provides higher power density and safety features by a novel winding architecture. Since the new winding architecture does not affect the measures, design or materials of the electric motor there is no need for any special manufacturing process or extra cost. Therefore the improved electric motors are smaller, lighter and cheaper than the same power size conventional electric motors as in other prior arts. The improved electric motor provides redundancy features against failure.