Electromagnetic Circuit Breaker Tripping for Power Failure Release
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Solution Overview
Problem
Existing circuit breakers, including intelligent ones, face challenges in automatically tripping during power failures due to insufficient energy for the tripping mechanism, leading to false triggering from mechanical vibrations and complex structures.
Innovation Solution
An intelligent circuit breaker design incorporating an electromagnetic force that reverses current direction between a mechanical spring and a permanent magnetic field, using an electromagnetic coil and control circuit to generate a repulsive force for tripping, replacing the mechanical energy storage mode with an electromagnetic energy storage mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a very sensitive intermediate mechanical tripping device is triggered by a small electromagnetic force, then the circuit breaker can trip during power failure, but the circuit breaker becomes bulky and the structure becomes too complicated
Solution Approach 1:
The patent replaces the traditional mechanical energy storage and release system with an electromagnetic system. The electromagnetic coil generates magnetic field force to directly drive the tripping mechanism, eliminating the need for complex mechanical springs and energy storage devices. This substitution achieves reliable tripping during power failure while significantly simplifying the overall structure.
Solution Approach 2:
The patent extracts and removes the unnecessary mechanical energy storage components from the tripping mechanism. By using only the essential electromagnetic coil and permanent magnet interaction, the design eliminates bulky mechanical parts while maintaining the tripping function, achieving a more compact and simple structure.
2Reliability
If a very sensitive intermediate mechanical tripping device is used, then the circuit breaker can trip during power failure, but small mechanical vibrations cause false tripping
Solution Approach 1:
The patent replaces the mechanical tripping mechanism with an electromagnetic one. The electromagnetic coil and permanent magnet interaction creates a controlled magnetic field force that is not susceptible to external mechanical vibrations. This substitution eliminates false tripping caused by vibration while maintaining reliable tripping capability during power failure.
Solution Approach 2:
The patent introduces the electromagnetic field as an intermediary between the control circuit and the tripping mechanism. The magnetic field force serves as a stable, controllable intermediary that translates electrical control signals into mechanical tripping action without being affected by external mechanical disturbances, thus preventing false tripping.
3Force
If residual power is limited during automatic tripping, then enough force cannot be provided to directly impact the tripping mechanism, but adding mechanical energy storage makes the structure complex
Solution Approach 1:
The patent substitutes the mechanical energy storage system with an electromagnetic energy storage and release system. The electromagnetic coil, powered by limited residual power, generates sufficient magnetic field force to directly actuate the tripping mechanism. This electromagnetic approach provides adequate tripping force without requiring complex mechanical energy storage devices.
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 design enhances the circuit breaker's ability to reliably trip during power failures while reducing sensitivity to mechanical vibrations, addressing the contradiction between tripping sensitivity and vibration tolerance.
Implementation Method 1
an electromagnetic coil framework (4) and a support (5) are arranged in the circuit breaker housing, the permanent magnet static iron core (1), the electromagnetic moving iron core (2) and the electromagnetic coil (3) are respectively fixed on the electromagnetic coil framework (4) through a first shaft hole (14), a second shaft hole (15) and a wire slot (16)
Implementation Method 2
a permanent magnet attraction reset shifting fork (6) is arranged in a shifting groove of the tripping transmission rod (8)
Data Source
AI summary
The present invention discloses an intelligent circuit breaker capable of automatically releasing and tripping in power failure, with an electromagnetic force capable of controllably changing a current direction arranged between a permanent magnetic field force and a mechanical spring force, and three forces are designed on a straight line, the permanent magnet static iron core, the electromagnetic moving iron core and the electromagnetic coil are respectively fixed on the electromagnetic coil framework through a first shaft hole, a second shaft hole and a wire slot, a tripping energy storage spring is sleeved on the tripping transmission rod, a permanent magnet attraction reset shifting fork is arranged in a shifting groove of the tripping transmission rod, and one end of the tripping transmission rod is provided with a tripping connecting rod.