High-Frequency Power Source With Synchronized Impedance Matching
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Solution Overview
Problem
Existing high frequency power sources for plasma treatment devices lack the ability for users to arbitrarily set temporal change patterns for the output of high frequency power, limiting flexibility and precision in power delivery.
Innovation Solution
A high frequency power source with an output portion, data storage for user-created command data, and a control portion that manages the output and impedance matching circuit based on this data, allowing for customizable power signals and synchronization signals to adjust power output and matching operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If preset simple temporal change patterns are used for high frequency power output, then the operation is simplified and ease of use is improved, but the flexibility and adaptability for arbitrary power delivery patterns deteriorates
Solution Approach 1:
The system transitions from static preset patterns to dynamic arbitrary waveform generation. The waveform generation unit can create power delivery patterns with any temporal change pattern by processing a plurality of data points, allowing the power output to dynamically follow custom-defined trajectories rather than being constrained to predetermined simple patterns.
Solution Approach 2:
The system changes the parameter of waveform definition from selecting from discrete preset options to continuously defining arbitrary waveforms through multiple data points. This allows transformation of the power delivery temporal characteristics from fixed simple patterns to customizable complex patterns by modifying the waveform data parameters.
2Adaptability or versatility
If arbitrary temporal change patterns for high frequency power are enabled, then the flexibility and adaptability are improved, but the device complexity increases
Solution Approach 1:
The waveform generation unit serves multiple functions: it can generate arbitrary waveforms from user-defined data points, reproduce stored waveform patterns, and coordinate with impedance matching operations. This multi-functional design allows the system to handle diverse power delivery requirements without requiring separate dedicated circuits for each function, thereby managing complexity while maintaining flexibility.
Solution Approach 2:
The waveform generation unit acts as an intermediary between the control input and the power amplification stages. It processes waveform data and generates appropriate control signals that coordinate both the power output and impedance matching operations, simplifying the overall control architecture by centralizing the waveform management function.
3Adaptability or versatility
If impedance matching circuit constants are changed to achieve broad matching range, then the adaptability is improved, but the matching speed deteriorates
Solution Approach 1:
The system employs periodic impedance matching operations synchronized with the waveform generation cycles. The impedance matching circuit constants are adjusted at specific periodic intervals coordinated with the power delivery phases, allowing the system to maintain broad matching capability while achieving practical matching speeds through rhythmic, predictable adjustment patterns rather than continuous or random changes.
Solution Approach 2:
The impedance matching adjustments are performed in advance or in coordination with the power waveform phases. By preparing and executing matching operations beforehand or in synchronized timing, the system ensures that matching is achieved within the required timeframes while maintaining the ability to cover broad impedance ranges through pre-planned constant adjustments.
4Manufacturing precision
If precise control of power delivery timing is implemented, then the manufacturing precision is improved, but the device complexity increases
Solution Approach 1:
The system implements feedback mechanisms where the actual power delivery and impedance conditions are monitored and used to adjust subsequent waveform generation and matching operations. This feedback loop enables precise control of power delivery timing by continuously comparing actual performance with target specifications and making real-time corrections, thereby achieving high precision without requiring overly complex open-loop control systems.
Data Source
AI summary
Provided is a high frequency power source allowing the user to arbitrarily set a temporal change pattern for the value of high frequency power to be outputted. A high frequency power source 10A according to the present invention includes an output portion 20 configured to output high frequency power to a load 40 via an impedance matching circuit 30, a data storage portion 13A configured to store command data created by a user, and a control portion 12A configured to control the output portion 20 and the impedance matching circuit 30 on the basis of the command data stored in the data storage portion 13A. Each of a plurality of records that constitute the command data includes power command data about a value of high frequency power to be outputted and matching operation command data about whether to activate the impedance matching circuit 30, and the control portion sends a power signal, which is generated on the basis of the power command data, to the output portion and a synchronization signal, which is generated on the basis of the matching operation command data, to the impedance matching circuit.