Electromagnetic Coupling Device Diode Relocation
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Solution Overview
Problem
Conventional electromagnetic coupling devices face issues with heat load on surge voltage absorbing diodes, reduced storage space for exciting coils, and increased assembly complexity due to waterproofing requirements.
Innovation Solution
An electromagnetic coupling device design that positions the surge voltage absorbing diode outside the field core, using an insulating bush as a storage member with a recess portion and through holes, which reduces heat transfer and serves as a waterproof cover, allowing for increased coil turns without size increments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the surge voltage absorbing diode is placed inside the field core near the exciting coil body, then the circuit connection is simplified, but the heat load on the diode increases and may degrade the diode
Solution Approach 1:
The surge voltage absorbing diode is extracted from the interior of the field core and relocated to the exterior surface. This separation removes the diode from the high-temperature zone generated by the exciting coil, reducing heat load and preventing degradation while maintaining circuit connection simplicity through external mounting.
2Volume of moving object
If the surge voltage absorbing diode is placed inside the field core, then the overall device size remains compact, but the storage space for the exciting coil is reduced
Solution Approach 1:
The diode is extracted from the interior space of the field core and positioned on the exterior surface. This frees up the interior volume of the field core, allowing for increased storage space for the exciting coil body and enabling more coil turns without increasing the overall device dimensions.
3Temperature
If the surge voltage absorbing diode is placed outside the field core, then the heat load on the diode is reduced, but additional waterproofing structures and assembly steps are required
Solution Approach 1:
The external surface of the field core is designed to serve dual functions: it provides mounting locations for surge voltage absorbing diodes and simultaneously acts as a waterproof barrier. By utilizing the existing field core structure for both magnetic function and environmental protection, no additional waterproofing components are needed, simplifying the overall device complexity.
4Power
If more exciting coil turns are added to improve performance, then the electromagnetic coupling performance increases, but the device size increases
Solution Approach 1:
The diode relocation to the exterior surface frees up interior volume within the field core. This additional space allows for increased exciting coil turns and larger coil dimensions without increasing the overall device envelope, thereby improving electromagnetic coupling performance while maintaining compact size.
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
This design reduces heat load on the diode, enhances waterproofing simplicity, and increases the number of exciting coil turns, improving performance and productivity by eliminating the need for dedicated waterproof covers and additional assembly steps.
Implementation Method 1
an insulating bush as a storage member with a recess portion and through holes, which reduces heat transfer
Implementation Method 2
serves as a waterproof cover, allowing for increased coil turns without size increments
Data Source
AI summary
An electromagnetic coupling device includes a field core, a surge voltage absorbing member, and a storage member. The field core is provided inside an exciting coil. The surge voltage absorbing member is connected to the exciting coil. The storage member is made of an insulating material and includes a recess portion to store the surge voltage absorbing member. A through hole is formed in an outer wall of the field core. The storage member is inserted into the through hole with an opening of the recess portion facing the exciting coil. The surge voltage absorbing member is inserted in the recess portion so as to be positioned outside the field core by the exciting coil.