Integrated Filter and Booster Reactor Cooling via Air Passage
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Solution Overview
Problem
Existing filter devices are inefficient in size reduction and cooling of filter reactors and booster reactors, which are typically installed separately and require significant installation space and wiring, and lack effective cooling mechanisms.
Innovation Solution
A filter device configuration where a filter reactor and a booster reactor are stored in a casing with the booster reactor forming an air passage around an iron core, allowing air to pass through the filter reactor, combined with air blowing means and a guide member to enhance cooling, and a filter resistor member and capacitor are disposed to manage high-frequency components and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the filter reactor and booster reactor are disposed separately, then the cooling effect is favorable, but the installation space and wiring workload increase
Solution Approach 1:
The patent combines the filter reactor and booster reactor into a single integrated module housed within one casing. The filter reactor (11) and booster reactor (12) are disposed in different chambers (22a, 22b) of the same housing, allowing them to be electrically connected while sharing common cooling infrastructure and reducing installation space requirements compared to separate installations.
2Area of stationary object
If the filter reactor and booster reactor are incorporated in a single module, then the installation space and wiring workload are reduced, but the cooling efficiency deteriorates
Solution Approach 1:
The housing is divided into two separate chambers (22a, 22b) that are thermally isolated from each other. The filter reactor is disposed in the rear chamber while the booster reactor is disposed in the front chamber, allowing independent cooling paths for each reactor while maintaining their electrical connection through the chamber separation.
Solution Approach 2:
A partition wall with an opening acts as an intermediary structure between the two chambers. The opening in the partition wall allows electrical connection between the filter reactor and booster reactor while maintaining thermal separation between the chambers, enabling both reactors to be cooled independently despite being in the same module.
3Temperature
If the booster reactor is configured to form an air passage, then the heat dissipation area increases, but the device complexity increases
Solution Approach 1:
The booster reactor serves dual functions: it performs its electrical function as a reactor while simultaneously forming an air passage for cooling purposes. The coil structure of the booster reactor creates channels through which cooling air can flow, eliminating the need for separate cooling channels and reducing overall device complexity.
Solution Approach 2:
The booster reactor's own coil structure is utilized to create the air passage, meaning the reactor itself provides the cooling pathway without requiring additional dedicated cooling components. The air flows through the coil structure of the booster reactor, using the reactor's inherent geometry for cooling purposes.
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 reduces the size of the device, enhances heat dissipation by increasing the contact area between air and the booster reactor, and effectively cools the filter and booster reactors while minimizing the impact of heat on the filter capacitors.
Implementation Method 1
the area of contact between the air passage and the air can be expanded, increasing the heat dissipation area
Implementation Method 2
a filter reactor for removing a high-frequency component
Implementation Method 3
a booster reactor for boosting a voltage of a current having passed through the filter reactor
Data Source
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AI summary
Provided is a filter device 10, which is electrically connected between a power supply 1 and a power converter 2 that includes a converter unit 3 for rectifying inputs and an inverter unit 4 for inversely converting outputs of the converter unit 3, the filter device 10 being configured such that a filter reactor 11 for removing a high-frequency component and a booster reactor 12 for boosting a voltage of a current having passed through the filter reactor 11 are stored in a filter main body 20, wherein the booster reactor 12 configures an air passage 125 for air between an inner circumferential portion and an outer circumferential portion of a coil 12b by wrapping the coil 12b around an iron core 12a, with spacers 123 interposed appropriately, and is stored in the filter main body 20 in such a manner that air that has passed through the air passage 125 passes through a periphery of the filter reactor 11 disposed immediately above the booster reactor 12.