Improvement of Energy Density in Single Stator Interior Permanent Magnet Using Double Stator Topology

Table 5

Values of 𝑇_𝑚, 𝑇_𝑐, 𝑇_𝑓, and THD based on evaluation types.

Evaluation type	SSIPM				DSIPM				DSIPM with thin pole shoe				DSIPM with thick pole shoe
	𝑇𝑚 [Nm]	𝑇𝑐 [Nm]	𝑇𝑓 [Nm]	THD %	𝑇𝑚 [Nm]	𝑇𝑐 [Nm]	𝑇𝑓 [Nm]	THD %	𝑇𝑚 [Nm]	𝑇𝑐 [Nm]	𝑇𝑓 [Nm]	THD %	𝑇𝑚 [Nm]	𝑇𝑐 [Nm]	𝑇𝑓 [Nm]	THD %
Min THD	0.97	0.008	0.566	57.88	1.308	0.0120	0.648	91.77	1.045	0.041	0.852	30.71	2.01	0.2325	1.60	42.56
Max 𝑇𝑓	1.13	0.016	0.699	70.09	1.306	0.0195	0.809	101.12	1.583	0.072	1.169	39.99	2.08	0.2303	1.65	43.37
Max 𝑇𝑚	1.58	0.016	0.671	92.74	2.322	0.0335	0.661	148.14	2.352	0.064	1.1563	67.54	2.94	0.3512	1.58	61.19
Min 𝑇𝑐	0.909	0.002	0.413	86.46	1.397	0.0084	0.711	107.72	1.224	0.004	0.8086	51.06	1.36	0.0731	1.07	48.53