An Analytical Solution to the Electromagnetic Performance of an Ultra-High-Speed PM Motor

Figure 6

Results of the no-load back-emf. (a) No-load back-emf of FEM at 120,000 rpm. (b) Comparison of no-load back-emf at 120,000 rpm. (c) Prototype of the ultra-high-speed PMSM. (d) Experimental curves of the phase voltage and frequency.

(a)

(b)

(c)

(d)