# Fault Diagnosis of Rotating Electrical Machines Using Multi-Label Classification
## 3 System Description and Experiment  
### System Description  
The outlined method requires precise measurements and an appropriate dataset. The theoretical considerations and their usability are validated by simulation investigations by using the collected data on the test bench. The Laboratory of Electrical Machines of the Institute of Automation provides equipment for motor diagnostics and expert system development that allows the integration of measurement, computing, and communication. The laboratory has a wind power simulation system, where the wind power is simulated by an inverter-driven cage induction machine (Leroy Somer 3 fFLSE225M-TC; No28221L12001/2012; IP55 IK08; P = 30 kW; \(n\) = 985 1/min; U = 230/400 V; f = 50 Hz; cos \(\varphi\) = 0.82). Three different types of motors are available on the test bench: one brushless synchronous machine of 40 kW, one double-fed asynchronous machine, and one permanent magnet  
\begin{table}
\begin{tabular}{c|c|c|c|c} \hline \hline
**Vibration Velocity** & **Class I. Small** & **Class II. Medium** & **Class III. Large** & **Class IV. Large** \\
**[mm/s]** & **Machines** & **Machines** & **Rigid Foundation** & **Soft Foundation** \\ \hline
0.28 & & & & \\
0.45 & & & & \\
0.71 & & & & \\
1.12 & & & & \\
1.80 & & & & \\
2.80 & & & & \\
4.50 & & & & \\
7.71 & & & & \\
11.20 & & & & \\
18.00 & & & & \\
28.00 & & & & \\
45.90 & & & & \\ \hline \hline \end{tabular}
\end{table}
Table 1: Vibration severity per ISO (International Organization for Standardization) 10816.  
Figure 1: Flowchart of the proposed multi-label fault diagnosis system.  
synchronous machine (PMSM) (Leroy Somer 3 fLSRPM200L-T; No728333K12001/2012; IP55 IK08; P = 40 kW; \(n\) = 1500 1/min; U = 400 V; f = 100 Hz; I = 83 A; 95.2%; Imax/In = 145%) on which the measurements and tests are carried out (see, Figure 2).  
The system is capable of simulating fault events. Misalignment and unbalance are introduced in the system, and a simple NI data acquisition system for data collection purposes is installed. The laboratory has the latest NI LabVIEW Software. The data acquisition system consists of the National Instruments PCI 6013 B-Series 16-Analog-Input multifunction DAQ board and the SC-2345 signal conditioning connector block with various modules and sensors connected to the test bench. The representation of the data acquisition system through the visualization of block schematic illustration is available in Figure 3.  
The measuring and controlling LabVIEW software collaborates with the above-presented devices and additional hardware components and conducts the measurements. The measurement data are processed simultaneously on each channel, which takes a relatively short time. The LabVIEW software is developed in order to inspect the proper configuration of the test bench. The software displays the amplitude-time signals of the three-phase stator current and vibration signals of the motor and the generator in real-time. The second tab of the software views the Park Vector's spectrums calculated from the current signals. Frequency-amplitude diagrams can be used to predict machine errors during measurement. The third part of the program saves the measurement results in the Excel.csv format, so the measured values can be evaluated and processed later.  
Figure 2: The test bench; (1) brushless motor, (2) permanent magnet synchronous motor, (3) double fed asynchronous motor, (4) coupling; Bellows shaft coupling connects the generator and the motor, (5) inverter-driven cage induction machine.