Adjustable Hall Effect Sensor System for Motor Positioning
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Solution Overview
Problem
Existing Hall effect sensor systems face challenges in accurately positioning sensors in small diameter motors with high pole counts, offering limited precision and stability, leading to inaccurate rotor position information due to vibration and wear, and inability to support motors with fine pole pitches or multiple Hall effect sensors.
Innovation Solution
An adjustable Hall effect sensor system featuring a sensor positioning component with a main body and extended portions made of a single printed circuit board, incorporating flexible circuits and cams for precise positional adjustment of Hall effect sensors, allowing independent adjustment of each sensor without affecting others, enabling fine incremental adjustments of up to 0.0508 mm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If Hall effect sensors are positioned in small diameter motors with high pole counts, then motor performance is improved, but positioning precision deteriorates due to limited space and vibration
Solution Approach 1:
The sensor positioning system is segmented into multiple independent adjustable components, each capable of positioning a Hall effect sensor individually. This allows precise positioning of each sensor without affecting others, overcoming the limitation of limited space in small diameter motors with high pole counts.
Solution Approach 2:
The system employs adjustable and repositionable sensor mounting mechanisms that allow dynamic positioning of Hall effect sensors. The sensors can be independently adjusted to optimal positions during assembly or maintenance, ensuring precise positioning despite vibration and wear during operation.
2Measurement precision
If multiple Hall effect sensors are positioned at various locations, then rotor position detection is improved, but positioning accuracy deteriorates due to interference between sensors
Solution Approach 1:
Each Hall effect sensor is mounted on a separate adjustable component that can be independently positioned. This segmentation eliminates interference between sensors during positioning, allowing each sensor to be accurately placed at its designated location without affecting the positioning of other sensors.
Solution Approach 2:
Adjustable mounting components serve as intermediaries between the sensor array and the motor structure. These intermediaries provide independent adjustment capabilities for each sensor, enabling precise positioning while preventing positional interference between multiple sensors.
3Ease of manufacture
If Hall effect sensors are fixed in position, then assembly is simplified, but reliability deteriorates due to vibration and wear causing position drift
Solution Approach 1:
The system transitions from fixed sensor mounting to dynamic adjustable mounting. Sensors can be initially positioned during assembly and then adjusted during operation to compensate for vibration and wear, maintaining reliable positioning without compromising assembly simplicity through the use of standardized adjustable components.
Solution Approach 2:
The adjustable mounting system allows changes in sensor position parameters during operation to compensate for drift caused by vibration and wear. This maintains reliable sensor positioning while keeping the assembly process simple through standardized adjustment mechanisms.
4Manufacturing precision
If fine incremental adjustments are implemented, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The system replaces complex mechanical adjustment mechanisms with simpler electronic or field-based positioning methods. Fine incremental adjustments are achieved through controlled actuation of positionable components, reducing mechanical complexity while maintaining high positioning precision through electronic control.
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 achieves high mechanical, electrical, and performance precision in positioning Hall effect sensors, improving rotor and stator alignment in electric motors, enhancing motor performance by better matching electrical inputs to desired rotational positions, increasing torque output, and reducing noise and vibration.
Implementation Method 1
A cam may comprise at least one notch, a circular lobe, and an eccentric lobe, whereby rotation of the cam adjust a position of a Hall effect sensor.
Data Source
AI summary
A adjustable Hall effect sensor system having a sensor positioning component is described. In one embodiment, the Hall effect sensor system is an independently adjustable sensor system, having a plurality of Hall effect sensor, wherein one Hall effect sensor may be displaced and adjusted without effecting the location of another Hall effect sensor. A sensor positioning component comprising a paddle coupled to a main body portion by a more narrow neck is described. A cam may be configured on a paddle and provide for fine tuning the position of a Hall effect sensor. In one embodiment the main body and extensions are comprised essentially of a circuit board.