Machine Diagnostics Electrical and mechanical analysis
Analysing your technical equipment and plant gives you information that you can use to increase service lifetimes and avoid expensive downtime and repair costs. We provide support in the following types of analysis:
- Winding resistance, insulation resistance, polarisation index (PI)
- Shock pulse measurement
- PD measurement
- System analysis
- Bearing diagnosis
- Frequency analysis
- Natural frequency determination
- Modal analysis
- Acoustic analysis
- Campbell diagrams
VEM prepares and evaluates vibration analyses that include the general working environment of your equipment and plant alongside your drives and generators.
Damage to rolling bearings often causes undesired machine downtime; analysing bearing condition involves frequency analysis using FFT and envelope curve methods. As an example, we prepare a bearing "fingerprint" upon commissioning on site and compare the results with the results taken before delivery to identify transport damage.
Frequency analysis refers to electrical, mechanical and acoustic parameters, providing a universal way of gaining insights into interference composition for root-cause analysis. We provide frequency analyses (FFT and CPB) in stationary operation as well as non-stationary processes, such as rolling mill drives powered by converters.
Natural frequency determination
Excessive vibration often causes damage to plant and equipment, and is mostly caused by combining excitation and natural frequencies in what is referred to as resonance. We determine natural frequencies in machine components by simple experiments involving striking the component and interpreting the response.