Compact Motor Design with Integrated Magnetic Encoder
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Solution Overview
Problem
Current motor technologies face issues with large errors in detecting motor rotation angles using linear Hall elements and increased size due to the arrangement of these elements on winding circuit boards.
Innovation Solution
A compact motor design featuring a rotary shaft with a first magnetic element and circuit boards, where the second circuit board with an electronic speed control is mounted on the rotary shaft, and a magnetic encoder on a second magnetic element for precise angle detection, eliminating the need for linear Hall elements and optimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a linear Hall element is used to detect motor rotation angle, then the motor structure is simple, but the detection precision is poor and the motor size increases
Solution Approach 1:
The patent replaces the linear Hall element detection system with a magnetic encoder system that uses a magnetic toothed wheel and Hall sensor array. This substitution enables more precise angle detection through magnetic field variations while maintaining a compact structure by integrating the detection components directly into the motor's rotating and stationary parts.
Solution Approach 2:
The patent transitions from single-point linear Hall element detection to multi-point magnetic field detection around the magnetic toothed wheel. By arranging multiple Hall sensors in an array and detecting magnetic field variations at different angular positions, the system achieves higher precision angle detection through spatial dimensionality.
2Measurement precision
If a linear Hall element is arranged on the winding circuit board, then the detection function is achieved, but the circuit board area and overall motor size increase
Solution Approach 1:
The patent extracts the angle detection function from the winding circuit board by implementing a separate magnetic encoder system. The magnetic toothed wheel and Hall sensor array are positioned independently from the circuit board, allowing the circuit board to maintain its original compact size while achieving precise angle detection through the dedicated encoder components.
Solution Approach 2:
The patent introduces a magnetic toothed wheel as an intermediary component between the rotating shaft and the Hall sensors. This magnetic intermediary transmits rotational position information through magnetic field variations, enabling angle detection without requiring direct integration of detection elements into the circuit board.
3Volume of moving object
If a compact motor structure is achieved, then the motor size is reduced, but the arrangement space for detection elements becomes limited
Solution Approach 1:
The patent merges the detection system components (magnetic toothed wheel, Hall sensors, and circuit board) into a tightly integrated assembly. The magnetic toothed wheel is mounted on the rotating shaft, the Hall sensors are positioned in a compact array, and the circuit board is arranged to minimize space, creating a unified compact detection system that reduces overall motor size while maintaining functionality.
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 design improves detection precision and reduces motor size by utilizing the magnetic encoder and electronic speed control on the second circuit board, creating a more compact motor structure.
Implementation Method 1
the second circuit board is provided with a magnetic encoder for detecting a magnetic field change of the second magnetic element
Implementation Method 2
the first circuit board being provided with a coil circuit, and the coil circuit being disposed on a surface of the first circuit board facing toward the first magnetic element
Data Source
AI summary
The present invention relates to the field of motor technologies, and provides a motor, a gimbal and a mechanical arm having same. The motor includes a rotary shaft, a first magnetic element, a first circuit board and a second circuit board. The first magnetic element is mounted on the rotary shaft and is capable of rotating with the rotary shaft. The first circuit board is mounted on the rotary shaft and disposed opposite to the first magnetic element. The first circuit board includes a coil circuit and the coil circuit faces toward the first magnetic element. The second circuit board is mounted on the rotary shaft, the second circuit board including an electronic speed control circuit, the second circuit board being electrically connected to the first circuit board. In the motor in the present invention, the second circuit board including the electronic speed control circuit is mounted on the rotary shaft, so that space of the motor can be properly used, thereby making a structure of the motor compact.