Universal Plasma Spray Power Delivery Unit
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Solution Overview
Problem
Conventional high voltage low current (HVLC) and low voltage high current (LVHC) plasma spray systems are incompatible, requiring separate power supplies and leading to high equipment costs and lack of standardization, especially in global operations.
Innovation Solution
A plasma spray system with a power delivery unit comprising multiple power supplies connected in parallel, operating in constant current mode, which automatically outputs different DC voltages based on the arc length of the plasma spray gun to sustain arcs in both HVLC and LVHC guns, allowing for universal operation of various plasma spray guns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate power supplies are used for HVLC and LVHC plasma spray guns, then each gun type can operate with its required voltage and current characteristics, but equipment cost increases and standardization is lost
Solution Approach 1:
The patent implements a universal power supply system that can operate both HVLC and LVHC plasma spray guns through parallel connection of multiple power supplies. The system automatically detects gun type and configures appropriate voltage and current parameters, eliminating the need for separate dedicated power supplies for each gun type while maintaining full compatibility with both configurations.
Solution Approach 2:
The power supply system is segmented into multiple independent power supply units connected in parallel. Each unit can be independently controlled to provide specific voltage and current characteristics. This segmentation allows the system to flexibly configure power delivery parameters (high voltage/low current for HVLC guns, low voltage/high current for LVHC guns) by activating appropriate combinations of parallel power supply units.
2Device complexity
If a single power supply system is designed to support both HVLC and LVHC guns, then equipment cost and standardization improve, but the system must handle wide variations in voltage and current requirements
Solution Approach 1:
The power supply system incorporates dynamic parameter adjustment capabilities that automatically adapt voltage and current output based on the connected plasma spray gun type. The system dynamically reconfigures the parallel power supply units to provide high voltage/low current for HVLC guns or low voltage/high current for LVHC guns, enabling a single static hardware configuration to deliver dynamically varying electrical characteristics.
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
Enables the use of a single power delivery system to operate multiple types of plasma spray guns, reducing equipment costs and achieving standardization, while maintaining efficient arc length sustenance across different gun types.
Implementation Method 1
Voltage necessary to form an electrical arc between the cathode and the anode is directly proportional to the physical separation between the cathode and the anode
Implementation Method 2
the thermal energy of the plasma is dependent on the power, relatively high amount of current (upwards of 1000 A) is needed to provide sufficient energy
Data Source
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AI summary
Different plasma spray guns (210) have differing current and voltage requirements for their operation. The spray guns (210) generally fall into low voltage high current and high voltage low current types. The power requirements of the guns (210) vary greatly in terms of overall power ranging from few tens of kilowatts to few hundreds of kilowatts. The guns (210) also have wide ranging requirements for voltage and current. A power delivery unit (230) is described in which the unit (230) is capable of delivering the wide range of power as well as the wide ranges of voltage and current. A plasma spray system (200) with such power delivery unit (230) can universally operate both the low voltage high current and high voltage low voltage spray gun types. Such system (200) can reduce capital and operation costs since shops need not maintain separate and incompatible plasma spray systems.