Pulse Discharge Power Supply Feedback Control for Uniform Discharge
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Solution Overview
Problem
In electric discharge treatment technologies, increasing electric power from a pulse discharge power supply can lead to a transition from uniform discharges to local discharges such as arc or spark discharges, reducing treatment efficiency and requiring halts to prevent further local discharge, thereby lowering overall efficiency.
Innovation Solution
A pulse discharge power supply that outputs multiple voltage pulses and uses a control circuit to adjust the second voltage pulse based on the integration value of the electric current from the first pulse, preventing local discharge by managing the electric current integration and reducing voltage when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the voltage or pulse repetition frequency is increased to increase electric power input, then the electric discharge power density increases and treatment efficiency improves, but the discharge transitions from uniform streamer/corona discharge to local arc/spark discharge, reducing homogeneous treatment and overall efficiency
Solution Approach 1:
The patent implements a feedback control mechanism where the current waveform from the discharge load is detected and fed back to the pulse generation unit. The integration value of the current waveform is calculated, and based on this feedback, the voltage pulse output is dynamically adjusted to prevent transition to local discharge while maintaining high power input
Solution Approach 2:
The patent makes the pulse generation unit dynamically adjustable by changing the voltage pulse width based on the integration value of the current waveform. When local discharge is detected (integration value exceeds threshold), the pulse width is reduced to suppress arc formation, and when uniform discharge is maintained, the pulse width is increased to enhance treatment efficiency
2Productivity
If the electric power input is increased to enhance treatment efficiency, then more radicals are produced, but local discharge occurs requiring halts in electric discharge, reducing overall productivity
Solution Approach 1:
The feedback control continuously monitors the discharge state through current waveform detection and dynamically adjusts pulse parameters to maintain uniform discharge, preventing the need for halts and ensuring continuous productive operation
Solution Approach 2:
The system performs preliminary detection of discharge state through current waveform integration before local discharge fully develops, allowing preventive adjustment of pulse width to avoid arc formation and maintain continuous treatment
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 approach effectively suppresses the occurrence of local discharges, maintaining uniform discharge distribution and enhancing treatment efficiency by accurately controlling the electric discharge process.
Implementation Method 1
electric discharge is generated by applying a voltage across the electrodes using a pulse discharge power supply. In accordance with the electric discharge being generated, radicals of ozone (O3), hydroxyl radicals (OH radicals) or the like are produced
Implementation Method 2
a control circuit for controlling an output of a second voltage pulse based on an integration value of an electric current flowing into the discharge load with respect to the first voltage pulse
Data Source
AI summary
One of the purposes is to provide a pulse discharge power supply for use in generating pulse discharge. The pulse discharge power supply includes a pulse generation unit, a control circuit, an electric current detector and an electric current signal processing unit. The pulse generation unit generates a first pulse, and applies it to a discharge load for generating pulse discharge. The electric current detector detects an electric current flowing into the discharge load in accordance with the application of the pulse. The electric current signal processing unit outputs into the control circuit a signal based on an integration result of the electric current having been detected. The control circuit controls the generation of a second pulse in the pulse generation unit based on the signal being received.