Electric Protection Circuit Switch Voltage Peak Absorption
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Solution Overview
Problem
In electric circuits of new energy vehicles, ships, and aircraft, the switching off of main positive and negative switches can lead to adverse effects due to equivalent capacitance and inductance, resulting in voltage increases and potential breakdowns, compromising circuit safety.
Innovation Solution
An electric protection circuit is designed with semiconductor switches connected in series and parallel to a protection module that absorbs energy across the switches' terminals when turned off, preventing voltage peaks and ensuring circuit safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the main positive switch and/or main negative switch are turned off to control the electric circuit, then the conduction of the electric circuit is controlled, but voltage peaks are generated across the switch terminals due to equivalent capacitance and inductance, leading to switch breakdown or circuit damage
Solution Approach 1:
The patent applies beforehand cushioning by connecting a protection module in parallel with the main positive and/or main negative switches. This protection module is pre-configured to absorb the equivalent capacitance and inductance effects before they can cause damage. When the switches are turned off, the protection module immediately absorbs the generated voltage peaks, preventing switch breakdown and circuit damage, thus resolving the contradiction between switch control operation and switch safety
2Productivity
If equivalent capacitance and inductance are present in the electric circuit, then the circuit can function with semiconductor switches, but when switches are turned off, adverse effects occur causing voltage increase and potential breakdown
Solution Approach 1:
The patent introduces an intermediary protection module that mediates between the semiconductor switches and the harmful voltage peaks generated by equivalent capacitance and inductance. This protection module acts as a buffer, absorbing the adverse effects and preventing them from reaching the switches. The intermediary component enables the circuit to maintain productivity through semiconductor switch conduction while simultaneously protecting against voltage peak damage
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
The solution effectively stabilizes voltages across the switches, reducing the risk of breakdowns and enhancing the overall safety and efficiency of the electric protection circuit by absorbing energy and managing switching frequencies.
Implementation Method 1
the protection module is configured to absorb electric energy across two terminals of the main positive switch and/or the main negative switch when the main positive switch and/or the main negative switch are turned off
Data Source
AI summary
The present application provides an electric protection circuit, which relates to the field of battery power. The electric protection circuit includes a battery pack, a main positive switch, a load device and a main negative switch connected in series. The main positive switch and/or the main negative switch include at least one semiconductor switch. The main positive switch and/or the main negative switch in the electric protection circuit are connected in parallel to a protection module, which absorbs electric energy across two terminals of the main positive switch and/or the main negative switch when the main positive switch and/or the main negative switch are turned off. The technical solution of the present application can improve the safety of the electric protection circuit.