Magnetic Levitation Sensor Ring for Precise Rotor Positioning
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Solution Overview
Problem
Existing magnetic levitation devices face challenges in accurately determining the position of the rotor in the radial plane, which affects the reliable contactless magnetic levitation and operation of sensitive equipment like centrifugal pumps.
Innovation Solution
A magnetic levitation device with a stator featuring a temple construction, including coil cores with longitudinal and transverse legs, and a ring-shaped holding device for magnetic field sensors, ensuring precise positioning and high accuracy in determining the rotor's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetic field sensors are arranged around the cup-shaped recess to determine rotor position, then measurement capability is improved, but positioning precision deteriorates due to inability to ensure precise and reproducible sensor positions
Solution Approach 1:
The holding device is designed with pre-formed cavities that precisely define the position of magnetic field sensors before assembly. Each cavity is shaped to match the sensor geometry, ensuring that when sensors are inserted, their positions are automatically determined with high precision without requiring complex adjustment or alignment procedures during manufacturing.
Solution Approach 2:
The holding device acts as an intermediary component between the cup-shaped recess and the magnetic field sensors. It provides a stable mounting structure with precisely engineered cavities that ensure reproducible sensor positions, thereby translating the general arrangement around the cup-shaped recess into accurate, consistent sensor positioning.
2Manufacturing precision
If a ring-shaped holding device with cavities is introduced to improve sensor positioning, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The ring-shaped holding device serves multiple functions simultaneously: it provides structural support for the magnetic field sensors, defines precise sensor positions through its cavities, maintains the circular arrangement around the cup-shaped recess, and ensures reproducible assembly. This multi-functionality justifies the additional component while avoiding unnecessary complexity.
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 proposed solution enables reliable and highly accurate determination of the rotor's position, enhancing the precision and safety of contactless magnetic levitation, particularly in applications like centrifugal pumps.
Implementation Method 1
the stator of the magnetic bearing device has a plurality of coil cores, each of which comprises a longitudinal leg extending from a first end in an axial direction to a second end... at least one concentrated winding is provided at each longitudinal leg, which winding surrounds the respective longitudinal leg
Implementation Method 2
magnetic levitation device for contactless magnetic levitation of a rotor... the rotor is magnetically supported without contact with respect to the stator
Implementation Method 3
a plurality of magnetic field sensors for determining the position of the rotor is arranged around the cup-shaped recess
Data Source
AI summary
A magnetic levitation includes a stator with coil cores, a concentrated winding provided at each longitudinal leg of the coil cores surrounding a respective longitudinal leg, the stator including a cup-shaped recess into which a rotor is configured to be inserted, magnetic field sensors to determine the position of the rotor arranged around the cup-shaped recess, and a ring-shaped holding device for the magnetic field sensors, the ring-shaped holding device having a cavity for each magnetic field sensor, the cavity delimited with respect to the radial direction by an inside wall and by an outside wall. The magnetic field sensors to be pushed into the cavity, and the cavity dimensioned such that the inside wall and the outside wall rest flat against the magnetic field sensors.