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Magnetic angle sensor device and method for estimating angle of rotation

A technology of angle sensor and magnetic field sensor, which is applied in the direction of converting sensor output, linear/angular velocity measurement, using electric/magnetic device to transfer sensing components, etc.

Active Publication Date: 2021-12-03
INFINEON TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Providing accurate measurements for this application can be demanding and requires an improved concept of angle measurement

Method used

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  • Magnetic angle sensor device and method for estimating angle of rotation
  • Magnetic angle sensor device and method for estimating angle of rotation
  • Magnetic angle sensor device and method for estimating angle of rotation

Examples

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Embodiment Construction

[0049] Various examples will now be described more fully with reference to the accompanying drawings in which some examples are shown. In the drawings, the thickness of lines, layers and / or regions may be exaggerated for clarity.

[0050] Therefore, while further examples are capable of various modifications and alternative forms, some specific examples thereof are shown in the drawings and described in detail later. However, this detailed description does not limit further examples to the specific forms described. Further examples may cover all modifications, equivalents, and substitutions falling within the scope of the disclosure. Like numbers in the description of the figures indicate like or analogous elements, which when compared to each other may be implemented identically or in modified form, while providing the same or similar functions.

[0051] It will be understood that when an element is referred to as being "connected" or "coupled" to another element, the eleme...

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Abstract

The present disclosure relates to a magnetic angle sensor device (100) and a method for estimating an angle of rotation. A magnetic angle sensor device (100) comprises a multi-pole magnet (130) rotatable about an axis of rotation (115). The geometric arrangement of the multi-pole magnets (120) is rotationally asymmetric with respect to the axis of rotation (115). Each magnetic field sensor circuit (140) includes a first magnetic field sensor element sensitive to a first magnetic field component and a second magnetic field sensor element sensitive to a second magnetic field component perpendicular to the first magnetic field component. The processing circuitry (150) is configured to calculate first intermediate angle information based on a combination of signals from the first plurality of magnetic field sensor elements, calculate second intermediate angle information based on a combination of signals from the second plurality of magnetic field sensor elements, and An estimate of the angle of rotation of the clamp (120) and / or the multi-pole magnet (130) is calculated based on the first and second intermediate angle information.

Description

technical field [0001] The present disclosure relates to methods and apparatus for estimating the angle of rotation of a rotatable body. Background technique [0002] Magnetic sensors such as Hall sensors or magnetoresistive sensors are used in many modern angular position sensing systems to detect the angular position of rotating objects such as shafts, pole wheels or gears. Such angular position sensors have applications in many fields such as automotive, industrial and others. For example, in automobiles, angular position sensors are used in brushless direct current (BLDC) motors to detect rotor position during operation or in steering angle measurements to provide information about the direction the driver wants for automated steering applications (e.g. , Electric Power Steering, Electronic Stability Control, Active Steering, Parking Assist, etc.). [0003] Some applications require unambiguous angle measurements from 0° to 360°, ie, within one complete revolution of a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/30G01P3/487G01D5/244
CPCG01B7/30G01D5/244G01P3/487G01D5/145G01D5/2454G01D5/2451
Inventor U·奥塞勒克纳
Owner INFINEON TECH AG