Contactless Power Transformer With Nested Magnetic Cores
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Solution Overview
Problem
Existing power transformers used in medical devices face issues such as magnetic leakage, low power transmission efficiency, and manufacturing difficulties, particularly in applications like X-ray imaging and CT devices.
Innovation Solution
A power transformer design featuring a first magnet with an annular magnetic core and winding, and a second magnet with a groove for embedding the annular body, both being contactless and using silicon steel for improved efficiency and ease of manufacture, with magnetic units arranged in a circle for enhanced coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional power transformer design is used, then power transmission can be achieved, but magnetic leakage occurs and power transmission efficiency is low
Solution Approach 1:
The magnetic core is divided into multiple magnetic units (first magnetic unit, second magnetic unit, third magnetic unit, fourth magnetic unit) arranged in a circular pattern. Each magnetic unit is independently positioned and connected, allowing precise control of magnetic flux paths and reducing magnetic leakage between components.
Solution Approach 2:
The first magnetic unit and second magnetic unit are nested within grooves of the third and fourth magnetic units respectively. This nested arrangement creates tight magnetic coupling, minimizes air gaps, and reduces magnetic leakage while maintaining efficient power transmission.
2Reliability
If traditional power transformer design is used, then power transmission can be achieved, but manufacturing difficulty increases
Solution Approach 1:
The transformer is segmented into modular magnetic units that can be manufactured separately and then assembled. This segmentation simplifies the manufacturing process for each individual unit while achieving complex magnetic circuit requirements through precise assembly of standardized components.
Solution Approach 2:
The magnetic units are arranged in a circular/dimensional configuration rather than traditional linear stacking. This dimensional change allows for more efficient magnetic coupling and provides manufacturing advantages by enabling standardized units to be assembled in a repeating pattern around a central axis.
3Reliability
If magnetic units are arranged in a circle, then coupling is enhanced and power transmission efficiency improves, but device complexity increases
Solution Approach 1:
The circular arrangement creates asymmetric magnetic flux paths that optimize coupling between primary and secondary windings. The non-linear spatial relationship between magnetic units enhances magnetic interaction while the repetitive modular structure keeps manufacturing and assembly manageable.
Solution Approach 2:
The circular arrangement of identical magnetic units creates symmetric magnetic potential distribution around the core. This equipotential-like configuration optimizes magnetic coupling efficiency while using standardized components that simplify the overall system 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 design achieves high power transmission efficiency with reduced magnetic leakage and simplified manufacturing, suitable for medical devices requiring efficient power transfer without physical connections.
Implementation Method 1
power transformers for power transmission from a primary coil (winding) to a secondary coil (winding)
Implementation Method 2
both being contactless and using silicon steel for improved efficiency and ease of manufacture
Data Source
AI summary
The present disclosure relates to power transformers and medical devices having the same. A power transformer may include a first magnet comprising a first magnetic core and a first winding and a second magnet comprising a second magnetic core and a second winding wound around a side wall of the second magnetic core. The first magnetic core may include an annular body, and the first winding may be wound around a side wall of the annular body. The second magnetic core may include a groove extending from an end surface of the second magnetic core. The first magnet and the second magnet may be contactless. At least part of the annular body may be embedded in the groove. The first winding and the second winding may be at least partially overlapped along an axial direction of the second magnetic core.