Angle Detection Using Anisotropic Rotor and Segmented Stator
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Solution Overview
Problem
Existing angle detection apparatuses, such as resolvers, require complex and precise adjustments and manufacturing processes to achieve high accuracy, making them difficult to assemble and costly.
Innovation Solution
An angle detection apparatus featuring a rotor with uniaxial anisotropy and a stator with fan-shaped sections, where the stator is divided into sections with alternating exciting and detection coils, allowing for easy assembly and high accuracy angle detection without complex working operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional resolver structures with curved gap formation plates and eccentric rotor projections are used, then angle detection accuracy is improved, but manufacturing complexity and assembly difficulty increase significantly
Solution Approach 1:
The stator is divided into multiple fan-shaped sections with alternating exciting and detection coils, allowing independent manufacturing and assembly of simple modular units rather than requiring complex integrated structures
Solution Approach 2:
The invention replaces complex mechanical adjustment mechanisms (curved gap formation plates, eccentric projections) with a magnetic field-based detection system using uniaxial anisotropic magnetic materials and electromagnetic coils
2Measurement precision
If traditional resolver structures with precise working operations are used, then angle detection accuracy is improved, but assembly time and labor requirements increase
Solution Approach 1:
The uniaxial anisotropic magnetic material is pre-aligned during rotor manufacturing, eliminating the need for post-manufacturing adjustment operations and ensuring accurate angle detection from the outset
Solution Approach 2:
The magnetic field generated by the exciting coil automatically interacts with the uniaxial anisotropic material in the rotor to produce detectable signals, eliminating the need for complex manual adjustment procedures
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 apparatus enables accurate angle detection with a simple structure, reducing manufacturing complexity and cost while maintaining high detection sensitivity.
Implementation Method 1
a rotor in which a disk member comprising a magnetic body has a magnetic permeability, which is generally uniaxially anisotropic
Implementation Method 2
at least one of the coils being a detection coil that intersects with the magnetic field excited by the exciting coil to detect a voltage corresponding to an angle of rotation of the rotor
Implementation Method 3
at least one of the coils being an exciting coil that generates a magnetic field
Data Source
AI summary
Provided is an angle detection device capable of detecting the angle with high sensitivity by a very simple assembly process without requiring complicated processing. The angle detection device is provided with: a rotor (5) which is formed by a disk plate body produced from a magnetic substance having uniaxial magnetic anisotropy, the disk plate body rotating around a center point within the disk plate surface; a stator (3) which is provided to face the plate surface of the disk plate body of the rotor (5), has approximately the same external shape as that of the rotor, and is divided into a plurality of fan-shaped regions, and in which an exciting coil or a detection coil is wound along the outer periphery of each of the divided regions.