Flyback Protection Unit for Transformer Reset in Pulse Modules
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Solution Overview
Problem
Existing electrical pulse generating systems face challenges in delivering high-frequency electrical pulses due to flyback issues and transformer core resetting, which can lead to damage and reduced operational range.
Innovation Solution
An electrical pulse generating module with a flyback protection unit and a transformer reset power supply, where the charging current is directed through the transformer to contribute to core resetting, allowing for high-frequency pulse generation while protecting the switch unit from flyback and optimizing transformer operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a switch unit is used to control charging and discharging of the electrical energy storage module, then the electrical pulse generating module can generate electrical pulses, but flyback may occur and damage the switch unit when the switch is opened after pulse termination
Solution Approach 1:
The patent converts the harmful flyback effect into a beneficial resetting function. The flyback voltage generated when the switch unit is opened is directed through the transformer to reset the transformer core magnetic state, rather than being dissipated as a harmful spike. This is achieved by configuring the flyback protection unit and utilizing the transformer's inductance to channel the flyback energy into core resetting, thereby protecting the switch unit while maintaining pulse generation capability.
Solution Approach 2:
The transformer serves as an intermediary element between the switch unit and the electrical energy storage module. During the switching transition, the transformer's magnetic core acts as a mediator to manage the energy transfer and flyback effects, allowing the system to handle high power pulses while protecting the switch unit through controlled flyback routing.
2Productivity
If the transformer core is reset after each electrical pulse, then the full operating range of the transformer is available for the next pulse, but a separate transformer reset power supply is required which increases device complexity
Solution Approach 1:
The charging power supply is designed to perform dual functions: charging the electrical energy storage module and resetting the transformer core. By configuring the flyback protection unit and utilizing the transformer's inductance, the same power supply circuit that charges the capacitor bank also provides the necessary reset current to the transformer core during the charging phase, eliminating the need for a separate reset power supply and reducing overall system complexity.
Solution Approach 2:
The patent merges the transformer reset function with the charging function into a single integrated power supply system. The charging current path is configured to also flow through the transformer for core resetting, combining two previously separate functions (charging and resetting) into one unified operation, thereby simplifying the power supply architecture.
3Productivity
If electrical pulses with high frequency are delivered to the transformer, then the productivity of the system increases, but flyback issues and transformer core saturation become more severe
Solution Approach 1:
The patent converts the harmful high-frequency flyback voltage into a beneficial core resetting mechanism. By routing the flyback voltage through the transformer during high-frequency operation, the system utilizes the flyback energy to maintain proper magnetic core state, preventing saturation and enabling sustained high-frequency pulse generation without exacerbating the harmful effects.
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 generation of electrical pulses with high frequency by effectively resetting the transformer core and protecting the switch unit, potentially reducing the need for a large transformer reset power supply and extending the transformer's operational range.
Implementation Method 1
the transformer core should preferably be reset to its proper magnetic operating point, for example by removing all, or substantially all, energy from the transformer core
Implementation Method 2
the transformer core may be reset (or 'biased') prior to the next electrical pulse begins so that it has a magnetic field strength -B1
Implementation Method 3
Due to the sudden disappearance of current when an electrical pulse is terminated, flyback may possibly occur in the electrical pulse generating module
Implementation Method 4
a charging current (which, e.g., may be provided by a power supply included in the electrical pulse generating module) present in the electrical pulse generating module during the charging of the electrical energy storage module may be directed, or conveyed, via the transformer, and may in so doing contribute to the resetting of the transformer core
Data Source
Figure 1
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Figure 4
AI summary
An arrangement (100) is disclosed, comprising an electrical pulse generating module (10) configured to generate at least one electrical pulse, and a transformer (20) electrically connected to the electrical pulse generating module (10). The electrical pulse generating module (10) comprises an electrical energy storage module (40) that can be charged or discharged, and a switch unit (50) controllably switchable between at least a conducting state and a non-conducting state. When the switch unit (50) is switched into the non-conducting state, a power supply (30) charges the electrical energy storage module (40) by way of a charging current. When the switch unit (50) is switched into the conducting state, the electrical energy storage module (40) is discharged to create an electrical pulse to be received by the transformer (20). The electrical pulse generating module (10) comprises a flyback protection unit (60) configured to protect the switch unit (50) against flyback upon the switch unit (50) being switched into the non-conducting state. The flyback protection unit (60) forms a current path (65) that bypasses the transformer (20), and is configured such that a relation between the voltage drop across the flyback protection unit (60) for the charging current and the voltage drop across the transformer (20) for the charging current is such so as to cause the charging current to be directed via the transformer (20) at least to some extent.