Solid-State Circuit Breaker Energy Absorption for Switch Protection
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Solution Overview
Problem
Solid-state circuit breakers face issues with overvoltage and overcurrent phenomena due to rapid changes in load, leading to potential damage of electronic switches from induced electromotive forces.
Innovation Solution
Incorporation of an energy-absorbing apparatus with diode branches and transient diodes to absorb or consume excess energy during overvoltage and overcurrent events, protecting the electronic switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If electronic switches are used in solid-state circuit breakers for dynamic load switching, then switching speed and control precision are improved, but overvoltage and overcurrent phenomena occur due to large rate of change of current, leading to potential breakdown of electronic switches
Solution Approach 1:
The patent applies beforehand cushioning by introducing an energy-absorbing apparatus consisting of diode branches and transient diode units that are pre-configured to absorb induced electromotive force and suppress overvoltage and overcurrent phenomena before they can damage the electronic switches, thus protecting the switches while maintaining fast switching capability
Solution Approach 2:
The patent uses an intermediary approach by inserting an energy-absorbing apparatus between the electronic switch module and the power source/load, which acts as a mediator to absorb excess energy and protect the electronic switches from harmful overvoltage and overcurrent effects during dynamic switching operations
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
Effectively mitigates overvoltage and overcurrent risks by absorbing excess energy, preventing damage to electronic switches and ensuring reliable operation.
Implementation Method 1
the rate of change of the current in the line can be large, so that the induced electromotive force caused by the inductance of the load or the supply line can lead to overvoltage and overcurrent phenomena
Data Source
AI summary
A solid-state circuit breaker is disclosed. The solid-state circuit breaker includes: an electronic switch module, wherein an input of the electronic switch module is connected to a phase of a power source and an output of the electronic switch module is connected to a phase of a load; and an energy-absorbing apparatus which includes: a first diode branch including two diodes whose anodes are connected forming a first diode branch midpoint; a second diode branch including two diodes whose cathodes are connected to each other forming the second diode branch midpoint; a transient diode unit connected between the first diode branch midpoint and the second diode branch midpoint; wherein the first diode branch and the second diode branch are connected between two phase lines or between a phase line and a neutral line. A power source line including the solid-state circuit breaker is also disclosed.