High-Frequency Power Supply Cooling and Miniaturization
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Solution Overview
Problem
Conventional high-frequency power supplies for ICP optical emission spectrometers are costly and large due to multiple transistors and large-scale capacitors, and inadequate cooling leads to heat density issues and reduced system scalability.
Innovation Solution
The high-frequency power supply is redesigned using a self-oscillation system with power MOSFETs, compact ceramic capacitors, and a cooling block with fins for efficient heat dissipation, along with a sealed housing to prevent dust ingress and corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional transistors and large-scale capacitors are used in the high-frequency power supply, then the system is stable and reliable, but the device size and manufacturing cost increase significantly
Solution Approach 1:
The patent changes the operating parameters by using self-oscillation at 27.12 MHz with power MOSFETs instead of conventional transistors, and compact ceramic capacitors instead of large-scale capacitors. This parameter change enables miniaturization while maintaining functional stability through the self-oscillation mechanism and appropriate component selection.
Solution Approach 2:
The patent extracts and removes unnecessary components from the conventional design. By eliminating the need for large-scale capacitors and multiple transistors through the self-oscillation circuit configuration, the power supply achieves compact size while maintaining reliability through the essential components only.
2Reliability
If conventional capacitors are used in the high-frequency power supply, then the circuit is stable, but the manufacturing cost increases
Solution Approach 1:
The patent employs compact ceramic capacitors that are inexpensive and readily available components. These capacitors, while smaller and more compact, provide sufficient stability for the high-frequency oscillation circuit at a lower cost compared to conventional large-scale capacitors, aligning with the principle of using cost-effective components.
Solution Approach 2:
The patent changes the capacitor type and size parameters to match the high-frequency self-oscillation requirements. By selecting appropriate compact ceramic capacitors with suitable capacitance values for 27.12 MHz operation, the circuit achieves both cost-effectiveness and functional stability.
3Reliability
If adequate cooling is provided for the high-frequency power supply, then the elements are protected from heat damage, but the device complexity and size increase
Solution Approach 1:
The patent converts the harmful heat generated by power MOSFETs into a manageable thermal issue through integrated cooling fins. The heat dissipation structure is designed to efficiently transfer and dissipate heat, turning the thermal challenge into a controlled aspect of the compact design rather than a source of complexity.
Solution Approach 2:
The patent merges the cooling function directly into the power supply housing structure. The cooling fins are integrated with the housing, combining the protective enclosure and thermal management functions into a single unified structure, thereby reducing overall device complexity while maintaining effective cooling.
4Ease of repair
If the housing is open for accessibility, then maintenance is easier, but dust ingress and corrosion increase
Solution Approach 1:
The patent employs a sealed housing structure that acts as a protective barrier against dust and corrosive environments. The housing is designed with appropriate sealing features to prevent harmful factor ingress while maintaining structural integrity and providing a degree of accessibility for necessary maintenance operations.
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 allows for continuous operation of the plasma flame with effective cooling of all elements, preventing damage from dust and harsh environments, and reducing the overall size and cost of the system.
Implementation Method 1
a fan for sending air to the elements on the high-frequency circuit substrate, wherein fins for allowing air to be cooled when the air flows are formed in the cooling block, and an air path for allowing the air that has flown through the fins to be supplied to the absorbing side of the fan is provided in the housing
Implementation Method 2
elements for supplying a high-frequency current to a high-frequency inductive coil are mounted on a high-frequency circuit substrate... heat density issues
Data Source
AI summary
In a high-frequency power supply for plasma having a housing and a high-frequency circuit substrate placed inside the housing elements for supplying a high-frequency current to a high-frequency inductive coil are mounted on the high-frequency circuit substrate, a cooling block for cooling the high-frequency circuit substrate, a fan for sending air to the elements on the high-frequency circuit substrate as wind are further provided, and fins for allowing air to flow through so that the air is cooled are formed on the surface of the cooling block. The housing is provided with an air path for supplying the air that has flown through the fins to the absorbing side of the fan.