A Diagnostic System for Speed-Varying Motor Rotary Faults

Table 1

Statistics of the estimated motor rotational speeds.

Specified rotational speed (rpm)	Average measured speed; (𝑓𝑟, rpm)	Average estimated speed; (𝑓𝑟𝑒, rpm)	Standard deviation of 𝑓𝑟𝑒	Average estimation error; 𝑓𝑟𝑒−𝑓𝑟
900	899.55	899.90	3.41	0.45
1000	1000.30	1001.90	3.52	1.60
1200	1199.56	1200.10	2.94	0.54
1350	1348.44	1348.80	2.87	0.36
1400	1398.20	1398.30	2.83	0.10
1600	1599.31	1600.40	3.55	1.09
1800	1799.52	1800.00	2.82	0.48