Bearing Current Detection via Electromagnetic Wave Reception
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Solution Overview
Problem
Existing technologies struggle to reliably detect electrical current pulses in rolling or sliding bearings caused by static charging of rotating machine parts, which can lead to bearing damage and white etching cracks.
Innovation Solution
A method and device that receive electromagnetic radio waves in the frequency range above 50 MHz generated by the current pulses, process the signals through filtering and envelope formation, and analyze the temporal progression of the pulses for condition monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional detection methods are used for bearing currents, then detection can be performed in converter-fed electrical machines, but the methods are application-specific and difficult to transfer to other areas including wind power systems
Solution Approach 1:
The patent replaces conventional electrical measurement methods with electromagnetic wave reception. Instead of using electrical probes and circuits to detect bearing currents, the invention uses a receiving device to capture electromagnetic waves emitted by the current pulses, enabling universal application across different machine types including wind power systems while maintaining reliable detection
Solution Approach 2:
The patent changes the detection parameter from electrical voltage/current measurement to electromagnetic wave frequency detection. By detecting electromagnetic waves in the frequency range above 50 MHz, the method achieves reliable detection across different applications without being constrained by application-specific electrical measurement requirements
2Productivity
If electrical current pulses in bearings are not detected, then the system operates continuously, but bearing damage and white etching cracks develop over time
Solution Approach 1:
The patent implements preliminary detection of bearing current pulses using electromagnetic wave reception and envelope formation. By detecting and analyzing current pulse events before they cause significant bearing damage, the system enables preventive maintenance actions to be taken while the bearing is still functional, maintaining both continuous operation and bearing reliability
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 reliable detection and evaluation of current pulses, allowing for timely maintenance and preventing bearing damage, particularly in wind power systems where static charging is a significant issue.
Implementation Method 1
receiving electromagnetic radio waves emitted in the frequency range above 50 MHz as a result of the characteristic electrical current pulses
Implementation Method 2
processing the received signal by signal processing in order to extract the current pulse events contained therein, including filtering
Implementation Method 3
electrical current pulses occurring as a result of static charging of rotating machine or system parts
Data Source
AI summary
A method and to a device for detecting characteristic electrical current pulses flowing through a rolling bearing or sliding bearing as a result of static charging of rotating machine or system parts. The device is provided with a receiving unit with an antenna for receiving electromagnetic radio waves, which electromagnetic radio waves are emitted in the frequency range above 50 MHz as a result of the characteristic electrical current pulses, a signal processing unit for processing the received signal by signal processing in order to extract the current pulse events contained therein, and an analysis unit for analyzing the temporal progression of the current pulse events for state monitoring of the rolling bearing or sliding bearing.