Segmented DC Motor Architecture for High Torque at Low RPM
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Solution Overview
Problem
There is a need for an improved high-torque, low RPM direct current electric motor that can be scaled and powered by solar power or battery systems without the use of permanent magnets, and can operate independently of traditional power grids.
Innovation Solution
A scalable low-speed high torque DC electric motor system comprising motor segments with rotor and stator assemblies, position sensors, and a computer system to control electromagnet energization, allowing for synchronized rotation and efficient torque generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional high-speed motors are used, then power output is sufficient, but torque at low RPM is inadequate for heavy-duty applications
Solution Approach 1:
The motor is divided into multiple independent motor segments (e.g., 12 segments) arranged around a central rotor. Each segment contains its own electromagnet assembly that can be independently controlled. This segmentation allows the motor to generate high torque at low speeds by coordinating the activation of multiple segments, while maintaining the capability for higher speeds when needed.
Solution Approach 2:
The system changes operational parameters by controlling which electromagnets are activated at different RPM ranges. At low RPM, multiple electromagnets are activated simultaneously to maximize torque. As speed increases, the activation pattern changes to maintain optimal performance. This dynamic parameter adjustment resolves the contradiction between torque and speed requirements.
2Use of energy by moving object
If permanent magnets are used in the rotor, then motor efficiency is improved, but cost and complexity increase
Solution Approach 1:
The invention extracts the permanent magnets from the rotor design, leaving only electromagnets in the stator segments. The rotor becomes a simple ferromagnetic structure without permanent magnets. This extraction simplifies the overall motor structure, reduces cost, and eliminates the need for expensive rare-earth magnets while maintaining motor efficiency through electromagnetic induction.
Solution Approach 2:
The system replaces the mechanical/permanent magnetic field generation with an electromagnetic field generation system. Instead of relying on permanent magnets mounted on the rotor, the invention uses electromagnets in the stator segments to create the magnetic field, substituting a more controllable and simpler mechanical structure for the complex permanent magnet arrangement.
3Force
If the motor is designed for high torque output, then it can drive heavy machinery, but the physical size and weight increase
Solution Approach 1:
The motor is segmented into multiple modular units arranged around a central rotor. Each segment contributes to the total torque output, allowing the system to achieve high torque through the combined effect of multiple smaller, lighter components rather than requiring a single large, heavy motor. The segments can be configured in different numbers and arrangements to match specific torque requirements.
Solution Approach 2:
The motor utilizes composite construction with ferromagnetic materials in the rotor and electromagnet assemblies in the stator segments. This composite approach allows for optimized material distribution that maximizes torque generation while minimizing overall weight, as each material is used where it provides the greatest functional benefit.
4Adaptability or versatility
If the motor system is made scalable for different applications, then versatility is improved, but control system complexity increases
Solution Approach 1:
The motor's segmented architecture naturally supports scalability - additional segments can be added or removed to match different torque and power requirements. The control system manages each segment independently through standardized interfaces, making it easier to scale the system for different applications without proportionally increasing control complexity. Each segment follows the same control logic, allowing for modular expansion.
Solution Approach 2:
The motor design incorporates universal features that allow it to serve multiple functions and applications. The same basic segment design can be used in different configurations and numbers to meet various torque and speed requirements. The control system uses standardized protocols that work across different scales and applications, reducing the complexity increase that would normally accompany scalability.
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 system provides reliable electromechanical power for homes, businesses, and industries, enabling power generation without inverters and infrastructure, and can drive various machines, including generators, pumps, and compressors, offering a cost-effective and portable power solution.
Implementation Method 1
one or more corresponding pairs of electromagnets, one of each pair of corresponding electromagnets mounted to the upper end of the said circular housing and one of each pair of corresponding electromagnets mounted to the lower end of the said circular housing
Data Source
AI summary
A scalable low-speed high torque DC electric motor system includes a rotor assembly having a rotor and one or more rotor laminations; a stator assembly having a circular housing including one or more corresponding pairs of electromagnets, one of each pair of corresponding electromagnets mounted to the upper end of the circular housing and one of each pair of corresponding electromagnets mounted to the lower end of the circular housing; a shaft assembly; a plurality of position sensors and a computer system. Multiple motor segments may connect with the shaft assembly to create an electric motor with higher performance metrics.