Matrix Motor Unit Structure With Shared Stator Torque Coupling
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Solution Overview
Problem
Existing motors face limitations in increasing output torque due to constraints on torque density, such as limited space in stator slots, magnetic permeability, and the risk of stator burnout from high currents, as well as increased size and weight when combining multiple motors through transmission mechanisms.
Innovation Solution
A matrix motor unit structure comprising multiple motor elements connected in an array within the same plane, with symmetrical torque output shafts and shared structural components, utilizing private and public stator yokes, windings, and magnetic circuit couplings to enhance torque output while reducing overall size and weight through a transmission mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If permanent magnets are added to the rotor or the number of poles is increased to increase torque density, then the output torque is improved, but the motor size and weight increase
Solution Approach 1:
The motor is divided into multiple independent motor elements arranged in an array, each generating torque independently. This segmentation allows the torque to be distributed across multiple smaller units rather than requiring a single large motor with heavy permanent magnets, thus achieving high output torque without proportionally increasing overall weight.
Solution Approach 2:
Multiple motor elements are merged into a single integrated motor structure with shared stator components and a common output shaft. This merging allows the individual torques of multiple elements to combine additively, achieving high total torque output while maintaining a compact design that avoids the weight penalty of multiple separate motors.
2Force
If current introduced into windings is increased to increase torque density, then the output torque is improved, but the stator may burn out
Solution Approach 1:
The total current requirement is segmented across multiple motor elements, each handling a portion of the total torque generation. This distribution reduces the current density in each individual winding set, lowering the risk of stator burnout while maintaining the same total torque output.
Solution Approach 2:
The patent introduces a current distribution mechanism that acts as an intermediary to allocate current optimally across different motor elements and windings. This mediator ensures balanced current distribution, preventing any single stator winding from being overloaded and reducing the risk of burnout.
3Force
If two or more motors are connected by transmission mechanism to increase total output torque, then the output torque is improved, but the overall size and weight increase
Solution Approach 1:
Multiple motor elements are merged into a single integrated structure with shared stator components, magnetic circuits, and a common output shaft. This eliminates the need for separate transmission mechanisms between independent motors, as the torque addition occurs at the source rather than through mechanical transmission, thereby reducing overall system size.
Solution Approach 2:
Multiple motor elements are nested within a shared stator structure, with their individual rotors and magnetic circuits contained within the common stator housing. This nesting arrangement allows multiple torque-generating units to occupy the space of a single motor, achieving high total torque without proportionally increasing external dimensions.
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 matrix motor unit structure achieves a higher output torque upper limit by arranging motor elements compactly, sharing structural components, and utilizing magnetic circuit couplings to enhance torque output without increasing size or weight, thereby overcoming the limitations of traditional motor designs.
Implementation Method 1
By introducing currents into the windings of the stator, the stator generates a rotating magnetic flux vector, which attracts the rotor to rotate, and finally, an output torque of the motor is achieved
Implementation Method 2
there is magnetic circuit coupling of the public stator yoke, the public stator teeth, and the public windings with at least one of the motor elements
Data Source
AI summary
The present application relates to the technical field of motors, and provides a matrix motor unit structure and a matrix motor. The matrix motor unit comprises at least two motor elements, and the motor elements are connected in an array form in a same plane and defined a motor main body structure. According to the matrix motor unit structure provided by the present application, the motor elements are compactly arranged, and a structure can be shared among the motor elements, so that the overall size and weight can be further reduced, and a higher output torque is obtained.