Segmented Stator Yoke Winding for X-ray Anode Torque
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Solution Overview
Problem
X-ray arrangements with rotary anodes face challenges in maximizing magnetic effect and power density due to a large air gap and limited stator space, resulting in reduced power density and torque.
Innovation Solution
A laminated stator core with radially inward-facing teeth and grooves, divided into segments with yoke windings, allows for a more compact design and increased torque by optimizing space usage and minimizing magnetic losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the air gap between stator and rotor is reduced to maximize magnetic effect, then the magnetic coupling is improved, but the electrical isolation is compromised due to high voltage potential of the rotor
Solution Approach 1:
The stator core is divided into multiple segments with insulating material between them, allowing the stator to be positioned closer to the rotor while maintaining electrical isolation through the segment insulation rather than relying solely on air gap distance
2Power
If the stator size is increased to provide more space for windings and improve power density, then the magnetic effect is enhanced, but the available space in the x-ray arrangement is exceeded
Solution Approach 1:
Dividing the stator into segments allows more efficient packing of windings within the limited space, as each segment can be independently optimized and the overall stator can be positioned closer to the rotor, effectively increasing power density without increasing external dimensions
Solution Approach 2:
The segmented structure allows windings to be nested more efficiently within the stator core, maximizing the use of available space for active magnetic components
3Area of stationary object
If the stator is made more compact to utilize limited space, then the space utilization is improved, but the torque output is reduced
Solution Approach 1:
The segmented stator design allows compact arrangement while maintaining or enhancing torque through improved magnetic coupling with the rotor, as the segments can be positioned optimally close to the rotor surface
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 solution enables a higher power density and more compact construction, increasing torque while maintaining the same size, and optimizing magnetic flux and winding configuration.
Implementation Method 1
A laminated stator core (7) having a number of teeth (8) facing inwards on an inner periphery and grooves (9) located between every two teeth (8) is provided. Disposed in the grooves (9) are windings (11), wherein individual turns (12) of a corresponding winding (11) run in one of the grooves (9) from a first axial end (13) of the laminated stator core (7) to a second axial end (14) of the laminated stator core (7), radially outwards, on an outer side back to the first axial end (13) of the laminated stator core (7), and radially inwards again to the corresponding groove (9).
Data Source
AI summary
An x-ray arrangement includes a vacuum container in, which a rotary anode and a rotor of an electrical machine are disposed. The rotary anode and the rotor have a torque-proof connection to one another and are rotatably supported in the vacuum container, so that the rotary anode and the rotor are rotatable around an axis of rotation. Viewed in a direction of the axis of rotation, a laminated stator core is disposed in an area of the rotor. The area of the rotor, in relation to the axis of rotation, surrounds the vacuum container radially outwards. A stator winding system is disposed in the laminated stator core. The stator winding system has windings embodied as a yoke winding.