## 5 Experimental Setup  
To validate this proposed study, the target experiment with a suitable approach was carried out. The measurement results were compared with the CFD results to verify the previous calculations. The water jacket with 17 channels of SRM prototype was manufactured, to confirm the CFD  
Figure 19: The directional deformation and acceleration for the SRM with solid shaft. (**a**) The directional deformation of mode-2; (**b**) the directional deformation of mode-5; (**c**) the directional acceleration of mode-2; (**d**) The directional acceleration of mode-5. Figure 18: The directional deformation and acceleration for the SRM with solid shaft. (**a**) Frequency response of the directional deformation; (**b**) frequency response of the directional acceleration. computation methods. Thermal testing involved inserting platinum resistance thermometer sensors (PT100) into the selected parts of the machine. The temperature rise of the stator and three ends winding were measured using five temperature sensors PT100. A PT100 sensor with an accuracy of type A \(\pm\) (\(0.15+0.002T\)) was used. Figure 20 shows the positions of PT100 in the prototype SRM. The location of each PT100 sensor is described in Table 10. The five measuring points were connected to the temperature monitor for temperature recordings. An electric pump pushed the coolant through the water jacket. The flow meter was used to monitor the coolant flow rate of the inlet port, and the flow rate of water was adjusted to 0.6 L/s at all times. The temperature rise of the outlet port was measured using an infrared radiation thermometer. The SRM was operated under a loaded condition at the rated speed of 105 rpm. Furthermore, the continuous output phase (DC) current rating of the power converter was 174 A, and a DC bus voltage of 510 V was used to energize the SRM. The experimental platform for 72/48 SRM is developed and shown in Figure 21[1]. The experimental platform of the Figure 21b consists of:  
1. Three-Phase Power Quality Analyzer Fluke 434. 2. Digital Oscilloscope (Measured Current). 3. Digital Oscilloscope (Measured Voltage). 4. Power Supply and Control System. 5. 72/48 Prototype SRM. 6. The Load Disc is Connected Directly to SRM. 7. Intelligent multi-channel Temperature inspection instrument (Temperature Monitor). The load was carried by the disc, which was coupled to the SRM shaft and adjusted by dual brake calipers. Furthermore, by using a three-phase power quality analyzer (Fluke 434), a force sensor, an optical digital tachometer, and an oscilloscope with a Hall sensor, it was possible to monitor the SRM parameters, such as output power, load, current and speed, as shown in Figure 21b. The ambient temperature was 26 \({}^{\circ}\)C during the experiment. The temperatures of five measuring points were recorded every 5 min using a temperature monitor until it reached a steady state. The temperature curves for various motor parts, underrated operating, are shown in Figure 22. The temperature of the components inside the motor was stable after 55 min. The temperature of the sensor measured points is listed in Table 11, and CFD values were compared. From the data in Table 11, it is clear that the simulation temperatures results are in close agreement with the experimental results and the accuracy of the simulation results is proven. Measurement records show that the highest temperature of the SRM winding ends was 78 \({}^{\circ}\)C. Compared with the simulation results of 77.5 \({}^{\circ}\)C, the temperature difference was 0.5 \({}^{\circ}\)C, so the simulation results were credible. The measurement of the natural frequencies was done by a hammer impact test. Figure 23 shows the diagram of the 72/48 SRM test bench for the impulse hammer excitation. The experiments used an  
Figure 21: The experimental platform for the SRM system. (**a**) the diagram of the 72/48 SRM test bench; (**b**) the picture of the SRM test bench.