Suppression of Thrust Fluctuation of a New Ironless Tubular Permanent Magnet Synchronous Linear Motor Based on the Halbach Array

Table 1

Relationship between h₁/h₂ and fundamental wave and harmonic of radial AGMF.

h1/h2	Fundamental wave (T)	Harmonic (T)				THD (%)
		3	5	7	9
1.0 (RPMS)	0.4304	0.0011	0.0091	0	0.0004	2.46
0.9	0.4231	0.0009	0.0064	0	0	1.73
0.8	0.4020	0.0007	0.0002	0	0.0004	0.32
0.7	0.3673	0.0004	0.0066	0	0.0002	1.96
0.6	0.3202	0.0001	0.0092	0	0.0003	3.00
0.5	0.2622	0	0.0064	0	0.0003	2.56