Flyback Discharge Control via Primary Current Calculation
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Solution Overview
Problem
Existing discharge control apparatuses for plasma reactors require insulation for high-voltage current detection, increasing production costs and complexity due to the need for secondary current and voltage handling components.
Innovation Solution
A discharge control apparatus that calculates supply energy and regeneration energy based on primary current and voltage, eliminating the need for secondary current and voltage handling, thereby simplifying the apparatus configuration and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If secondary current detection is performed using non-contact-type current sensor for high voltage insulation, then measurement precision is maintained, but device complexity and production cost increase due to insulation components
Solution Approach 1:
The patent extracts the current detection function from the high-voltage secondary side and relocates it to the low-voltage primary side. By detecting primary current instead of secondary current, the system eliminates the need for non-contact current sensors and their associated insulation components, directly resolving the contradiction between measurement precision and device complexity
Solution Approach 2:
The patent uses primary current as an intermediary parameter to indirectly obtain information about secondary current and power supply status. Instead of directly measuring secondary current with complex insulation requirements, the system measures primary current which correlates with secondary current through transformer ratios, thereby achieving the same control objective with simpler hardware
2Reliability
If non-contact-type current sensor with insulation is used for secondary current detection, then reliability is improved through proper insulation, but production cost increases due to additional components
Solution Approach 1:
The patent removes the high-voltage insulation requirement entirely by extracting the current detection function from the secondary side to the primary side. Standard current sensors can be used on the primary side without special insulation, dramatically reducing component costs while maintaining system reliability
Solution Approach 2:
By using standard current sensors on the primary side instead of expensive non-contact current sensors with insulation assemblies on the secondary side, the patent replaces costly specialized components with cheaper, readily available alternatives that achieve the same functional outcome
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 effective control of the power supply circuit without secondary current and voltage components, reducing production costs and simplifying the apparatus structure while maintaining control precision.
Implementation Method 1
a transformer 4 having a primary coil 21 and a secondary coil 22 and which performs voltage conversion
Implementation Method 2
a plasma reactor 3 which generates plasma by discharge
Data Source
AI summary
A discharge control apparatus for controlling a flyback power supply circuit which includes a transformer having a primary coil and a secondary coil and performing voltage conversion, and a driver for controlling energization of the primary coil. The power supply circuit supplies electric energy to a plasma reactor. The discharge control apparatus calculates, based on primary current flowing through the primary coil and primary voltage generated in the primary coil, supply energy supplied to the primary coil and regeneration energy which is a portion of the supply energy not used for the discharge in the plasma reactor. The discharge control apparatus controls the power supply circuit based on the calculated supply energy and the calculated regeneration energy. Also disclosed is a method for controlling the flyback power supply circuit.