Detecting bearing failures through stator current measurements (MCSA) seems quite tricky. However, using electrical signals, we are able to construct a crystal clear view of the rotor position relative to the stator housing during operation. In the following case, we detected a cocked bearing just after an overhaul of a 200 kW compressor (small cage frequency sidebands around the rotor bar passing frequency). The machine was revised again before abrupt failure and collateral damage could arise.
Using safely captured voltage and current signals of an electric machine, the instantaneous electromechanical torque can reveal interesting information regarding the condition of the entire drivetrain. In a recent case, we avoided an unexpected failure by detecting a worn-out gear on the low-speed output shaft (378 RPM) of a gearbox driven by a 250 kW VFD-fed induction machine.
BEMAS – MCSA TRAINING DAY – 23/09/2020
Want to know more about diagnostics using stator currents and how to implement it? Join us at our MCSA training day on the 23th of September 2020!
Machine optimization by performing vibration and stator current analysis (MCSA)
ORBITS is passionate about electromechanical engineering and rotating machinery. Backed up by thorough electrical and mechanical expertise, we are specialists in monitoring and analyzing your rotating equipment with the latest technology. We are world-class experienced in troubleshooting and machinery fault diagnosis by both Motor Current Signature Analysis (MCSA) and vibration analysis. By combining state-of-the-art technologies, common sense and a knowledge driven professional mindset, we identify and characterize any root cause problems or threats that can affect the uptime of your critical machinery.
Quality service is our goal
ORBITS provides three main services: training, consulting and measuring. As ORBITS is a fully independent company, all advises and training are provided with ensured neutrality and objective approach. Furthermore, our high-level academic backgrounds and critical mindset guarantees validity of any analysis and modelling assignment. Our professional approach in conducting experiments and industrial measurements will optimally scope a broad range of possible phenomena complemented with an academic analysis shaped in an accessible and high-quality report.
ORBITS ensures a thorough transition of knowledge on a very broad range of topics related to both electrical and mechanical engineering with a special focus on digital signal processing, condition monitoring, root cause failure analysis, MCSA and vibration analysis. This on the appropriate levels with an industrial and academic approach.
ORBITS can provide advanced advice in both the development of your machine and the exploitation of these electrical and mechanical systems. This high-level and fundamental expertise easily results in the ultimate maintenance strategy: avoiding and anticipating the failure modes and effects of your critical rotating machinery.
With lots of industrial experience, ORBITS is very skilled in setting up high-end diagnostic measurements on a very broad range of machinery (from Watts till Mega Watts). Combining the electrical ánd mechanical measurements ensures us to find the root cause of any (re)occurring problem. All of this to increase the uptime of your plant.