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

Table 6

Comparative evaluation of various structures of the IPM.

Parameters	SSIPM		DSIPM	DSIPM with thin pole shoe	DSIPM with thick pole shoe		Reference [19, 20]
	Numerical	Measurement	Numerical	Numerical	Numerical	Measurement	Numerical
𝐼[A]	6	6	6	6	6	6	4
𝑅𝑡 [Ω]	3.0	3.0	3.0	3.0	3.0	3.0	6.25
𝑉 [m^3] ×10^−5	4.75	4.75	4.75	4.75	4.75	4.75	4.75
𝑇𝑓 [Nm]	0.65	0.6	0.64	0.852	1.60	1.68	0.8
𝐾𝑡 [Nm/A]	0.108	0.1	0.106	0.142	0.267	0.28	0.2
𝑇𝑑 [Nm/A/m^3] ×10^3	2.28	2.1	2.23	2.98	5.62	5.89	16.84
𝐾𝑚 [Nm/A/W^(1/2)] ×10^3	10.8	10	10.6	14.2	26.7	28	0.02
𝐺 [Nm^2A^2/W/m^3]	2.45	2.1	2.36	4.24	15	16.5	8.42