Hall Effect Sensor Merging Commutation and Position Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rotary to linear actuator systems require complex and costly feedback systems, such as encoders and resolvers, for position and speed control, which are unnecessary for applications requiring simpler motion control like linear actuators.
Innovation Solution
A linear actuator system using inexpensive analog Hall Effect sensors and magnets for feedback, combined with signal conditioning circuitry and a tracking converter observer algorithm, to provide both commutation and position/speed control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional encoder or resolver systems are used for position and speed control, then measurement precision and control accuracy are improved, but device complexity, cost, and weight increase
Solution Approach 1:
The patent combines the functions of commutation sensing and high-resolution position/speed feedback into a single Hall effect sensor system. The sensor simultaneously provides both the commutation signals needed for motor control and the high-resolution incremental signals needed for position and speed control, eliminating the need for separate encoder or resolver systems.
Solution Approach 2:
The Hall effect sensor system is designed to perform multiple functions: it provides commutation detection for motor control, generates high-resolution position feedback, and enables speed control. This multi-functional approach replaces traditional specialized components like encoders and resolvers with a single versatile sensing system.
2Measurement precision
If separate Hall Effect switches and encoders are used for commutation and position control, then measurement precision is improved, but device complexity and number of connections increase
Solution Approach 1:
The patent merges the functions of separate Hall Effect switches and encoders into a single Hall effect sensor system. The sensor provides both commutation detection and high-resolution position feedback through integrated signal processing, reducing the number of components and connections required.
Solution Approach 2:
The single Hall effect sensor system performs multiple sensing functions that traditionally required separate components. It simultaneously provides commutation signals for motor control and high-resolution incremental signals for position and speed control, eliminating the need for multiple dedicated sensors.
3Manufacturing precision
If high resolution feedback systems are implemented, then position and speed control accuracy is improved, but cost and device weight increase
Solution Approach 1:
The patent replaces traditional mechanical feedback systems like encoders and resolvers with an electronic Hall effect sensor system. This substitution maintains high-resolution position and speed control accuracy while significantly reducing the weight and complexity of the feedback system.
Solution Approach 2:
The patent uses inexpensive Hall effect sensors instead of costly encoder or resolver systems. While Hall sensors may have shorter operational life in harsh environments, they provide the necessary control accuracy at a fraction of the cost and weight of traditional high-resolution feedback systems.
4Measurement precision
If encoder systems are used for both commutation and position control, then measurement precision is improved, but ease of manufacture decreases
Solution Approach 1:
The patent combines commutation sensing and position feedback functions into a single Hall effect sensor system, simplifying the manufacturing process. Instead of requiring precise installation and calibration of multiple separate components like encoders, the single sensor system reduces assembly complexity and manufacturing difficulty.
Solution Approach 2:
The patent extracts the commutation sensing function from the encoder system and integrates it into the Hall effect sensor. This separation allows the Hall sensor to independently provide both commutation and position signals, simplifying the overall system architecture and manufacturing process.
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 solution reduces costs, size, and weight while maintaining effective control, making it suitable for compact, efficient applications like small electrically powered linear actuators with concentric force-bearing components.
Implementation Method 1
analog Hall Effect sensors and magnets for feedback
Data Source
AI summary
One or more magnets are mounted on the rotor of a motor/actuator and analog Hall Effect sensors are mounted on the stator of the motor actuator to provide the necessary feedback for both speed and position control of the rotor. The feedback system includes signal conditioning circuitry for conditioning the sinusoidal signal produced by the magnet and the Hall Effect sensors and a tracking converter observer algorithm executing on the system microprocessor to produce controlled motion. The controller (and other electronics) may be integrated into the housing of the motor or actuator to provide a compact, efficient system for use in a number of applications.