Segmented Brake Coil for Rapid Release and Contamination Prevention
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Solution Overview
Problem
Existing electromagnetically actuable brakes face challenges in extending service life due to magnetic field-induced ferromagnetic particle adhesion on rotor shafts, leading to contamination and reduced performance.
Innovation Solution
The brake coil is designed with multiple partial windings, where the first set is energized with a stronger current for rapid release and the second set with a weaker current for energy-efficient holding, minimizing magnetic field exposure to surrounding steel parts and guiding flux within the coil body to prevent contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional brake coil with uniform winding is used, then the brake can be held reliably, but the magnetic field causes ferromagnetic particles to adhere to the shaft and reduces service life
Solution Approach 1:
The brake coil is divided into multiple partial windings (first partial winding and second partial winding) with different current characteristics. The first partial winding uses higher current for rapid release, while the second partial winding uses lower current for holding, thereby reducing magnetic field exposure to the shaft and preventing ferromagnetic particle adhesion during the holding phase
Solution Approach 2:
Different regions of the coil body have different current densities and magnetic field strengths. The first partial winding is designed to generate strong magnetic fields for release, while the second partial winding generates weaker magnetic fields for holding, creating local quality variations that reduce overall magnetic field exposure to surrounding steel parts
2Speed
If a strong current is applied to the brake coil for rapid release, then the release speed is improved, but energy consumption increases and magnetic field exposure to steel parts increases
Solution Approach 1:
The brake coil operates in two distinct phases: a first period with high current for rapid release, and a second period with low current for holding. This periodic action pattern allows the system to achieve fast release when needed while minimizing energy consumption during the extended holding period
Solution Approach 2:
The first partial winding is designed to provide excessive current for rapid release, while the second partial winding provides just sufficient current for holding. This partial action approach ensures fast release performance without maintaining high energy consumption during normal operation
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 enables rapid release and energy-efficient holding while preventing ferromagnetic particle adhesion, reducing contamination and extending the service life of the brake by ensuring minimal magnetic field exposure to steel parts.
Implementation Method 1
the brake coil (8) comprises a winding which is formed from a first number and a second number of partial windings
Implementation Method 2
Fields emanating from the brake sometimes also magnetize rotatably mounted steel parts, such as the rotor shaft
Implementation Method 3
so that ferromagnetic particles can adhere
Implementation Method 4
the first number of partial windings is used to release the brake is acted upon within a first period of time with an electric current
Data Source
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AI summary
The invention relates to an electromagnetically actuable brake and a method for operating a brake, wherein a brake coil is provided which comprises a winding, wherein the winding is composed of partial windings.