An Improved Electronic Line Shafting Control for Multimotor Drive System Based on Sliding Mode Observer

Figure 11

Speed synchronization errors of three PMSMs: (a) PMSM1 increases load and PMSM3 decreases load of the conventional ELS; (b) PMSM1 increases load and PMSM3 decreases load of the improved ELS; (c) PMSM1 decreases load and PMSM3 increases load of the conventional ELS; (d) PMSM1 decreases load and PMSM3 increases load of the improved ELS.

(a)

(b)

(c)

(d)