Reduction of Cogging Torque in Dual Rotor Permanent Magnet Generator for Direct Coupled Wind Energy Systems

Table 3

Percentage reduction in cogging torque and induced emf.

S. number	Cogging torque reduction method	Cogging torque reduction (%)	Induced emf reduction (%)
1	Changing slot opening width	51.10	1.48
2	Changing magnet pole arc width	33.99	2.36
3	Shifting of slot openings	64.30	1.08
4	Combined effect	89.33	2.88