The TIDA-060040 reference design demonstrates a method for absolute angle encoding typical in precision motor-control applications, such as robotic arm control. Angle encoding can be achieved using various magnetic sensing technologies. This is done by detecting two magnetic flux density, B-field, vector components that are naturally 90° out of phase. As the magnet spins, the sensor inputs are sinusoidal, which allows for calculations using trigonometric properties.
However, due to electrical and mechanical characteristics of the system, it is often necessary to correct the final result to achieve the greatest accuracy. Typically, in most precision motor-control applications, the final target error is less than 0.1°. This design explores the process for selecting a magnet, determining placement and correcting for system-level imperfections to achieve a highly-accurate angle measurement.
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Reference design overview and verified performance test data
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | Abs. Angle Encoder Ref. Des. W/ Hall-Effect Sensors for Precise Motor Pos. Cont. | PDF | HTML | Mar. 16, 2022 |
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