Three-Phase Filter Tapered Housing Cooling
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Solution Overview
Problem
Filters in three-phase power systems face challenges with significant heat loss, large space requirements, and heavy weight due to coil blocks, making them difficult to mount on vertical walls effectively.
Innovation Solution
The largest coil block is arranged in front of the fan, with a tapered housing design that enhances airflow and cooling efficiency, allowing for reduced overall space and improved heat dissipation, while the smaller coil blocks are positioned to benefit from the airflow, and the filter is mounted with the tapered side facing downwards for enhanced cooling and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the largest coil block is arranged in front of the fan, then heat loss is reduced most effectively, but the smaller coil blocks arranged in the lee are hardly cooled
Solution Approach 1:
The patent applies local quality by directing maximum cooling capacity to the largest coil block (L1) which generates the most heat, while accepting that smaller coil blocks (L2, L3) will receive less cooling. This localized cooling strategy optimizes energy loss reduction by focusing resources on the most critical heat-generating component.
Solution Approach 2:
The patent implements partial action by providing sufficient cooling only to the largest coil block rather than uniformly cooling all coil blocks. The fan is positioned and sized to deliver concentrated airflow to L1, accepting that L2 and L3 will be cooled to a lesser extent, thereby reducing overall system complexity while maintaining effective heat management.
2Volume of stationary object
If the housing is tapered from the first side to the second side, then the overall space requirement is reduced, but the smaller coil blocks are positioned in a narrower space
Solution Approach 1:
The patent applies asymmetry by designing a tapered housing where the width varies along its length, with the first side being wider than the second side. This asymmetric geometry allows optimal positioning of the largest coil block at the wider end while accommodating smaller coil blocks at the narrower end, reducing overall housing volume while maintaining proper component placement.
Solution Approach 2:
The patent utilizes dimensional optimization by arranging coil blocks in a linear sequence from first to second side along the tapered housing. This one-dimensional arrangement within the three-dimensional tapered space efficiently utilizes the varying cross-sectional area, minimizing housing volume while ensuring each coil block has adequate space.
3Stability of the object's composition
If the filter is mounted on a vertical wall with the second side facing the floor, then the center of gravity moves closer to the wall improving stability, but the airflow path must accommodate the tapered shape
Solution Approach 1:
The patent applies asymmetry in mounting configuration by designing the housing with a tapered shape where the second side (narrower end) faces the floor when mounted vertically. This asymmetric orientation positions the center of gravity closer to the mounting wall, enhancing stability, while the tapered geometry naturally guides airflow from the wider first side to the narrower second side.
Solution Approach 2:
The patent achieves equipotentiality in terms of gravitational stability by orienting the tapered housing so that its center of gravity aligns closer to the vertical wall mounting surface. This gravitational balancing reduces torque and improves mounting stability, while the airflow path is simultaneously optimized by the same tapered geometry.
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 configuration significantly reduces heat loss, optimizes space usage, and improves cooling efficiency, allowing for effective mounting on vertical walls by concentrating cooling efforts on the largest coil block and ensuring better airflow for smaller coil blocks, thus enhancing overall performance and stability.
Implementation Method 1
The filter also has a fan (8) for actively cooling the first coil block (16) and possibly the second coil block (17) and/or the third coil block (18). The air flow moves from the first side of the housing (14) to the second side thereof.
Implementation Method 2
When the air flow moves from the first side of the housing to its second side, there is a kind of chimney effect that creates a particularly laminar flow in the housing and thus creates better heat dissipation.
Implementation Method 3
When the air flow moves from the first side of the housing to its second side, there is a kind of chimney effect that creates a particularly laminar flow in the housing and thus creates better heat dissipation.
Implementation Method 4
When the air flow moves from the first side of the housing to its second side, there is a kind of chimney effect that creates a particularly laminar flow in the housing and thus creates better heat dissipation.
Implementation Method 5
The air flow behind the first coil block is guided back to the smaller second coil block(s) and possibly the third coil block. The taper thus ensures that the smaller, second and possibly third coil(s) behind the first coil are better cooled.
Data Source
Figure 1~1C
Figure 2~4
Figure 5~7
AI summary
A filter with three phases, comprising for each phase an input terminal (23), an output terminal and a capacitor, wherein for each of the three phases the input terminal (23) is electrically connected to the output terminal (24) via a connection point, wherein the connection points of the three phases are electrically connected via the three capacitors in a star and/or delta configuration, wherein the filter comprises a housing (14) containing two coil blocks, wherein the housing (14) has a first side and a second side opposite the first side, wherein the two coil blocks are arranged along a line between the first side and the second side, wherein a fan (8) is arranged on the first side of the housing (14) for cooling the two coil blocks, wherein the two coil blocks are selected from the following three coil blocks: a first coil block (16) with three first coils,wherein for each of the three phases one of the three first coils is connected between the connection point and the input terminal (23), a second coil block (17) with three second coils, wherein the connection points of the three phases are electrically connected via the three second coils and the three capacitors in a star and/or delta configuration, and a third coil block (18) with three third coils, wherein for each of the three phases one of the three third coils is connected between the connection point and the output terminal (24), wherein the larger of the two coil blocks is arranged between the fan (8) and the smaller of the two coil blocks.