Multiparameter Analysis for Efficiency Improvement of Single-Phase Capacitor Motor

Table 4

Rated load operation.

Motor characteristic	BM	M1	M2
Rated speed (rpm)	2846.48	2831.72	2831.72
Line current (A)	1.35	1.1788	1.159
Main winding current density (A/mm^2)	4.422	3.6562	3.608
Auxiliary winding current density (A/mm^2)	3.6	3.38	3.284
Main winding current (A)	1.0166	0.84	0.829
Auxiliary winding current (A)	0.3693	0.346	0.336
Capacitor losses (W)	72.378	63.54	59.98
Iron core losses (W)	4.487	3.93	3.13
Stator ohmic losses (Ω)	43.345	33.083	31.9
Rotor ohmic losses (Ω)	15.91	16.603	16.34
Mechanical losses (W)	13.424	13.28	13.28
Total losses (W)	149.545	130.454	124.67
Input power P1 (W)	273.552	254.352	248.7
Output power P2(W)	124	123.89	124.04
Efficiency factor (eta) η(%)	45.332	48.7	49.87
Output torque T (Nm)	0.416	0.4178	0.418
Maximum torque (Nm)	0.83	0.775	0.754
Power factor (/)	0.919	0.98	0.975
Rated slip (/)	0.051	0.056	0.056