Development of Digital Control for High Power Permanent-Magnet Synchronous Motor Drives

Figure 9

Experimental results of the proposed system under 0~2200 rpm speed variations: (a) motor speed command 𝜔^∗_𝑟𝑚; (b) motor speed 𝜔_𝑟𝑚; (c) electromagnetic torque 𝑇_𝑒; (d) phase current 𝑖_𝑎𝑠; (e) q-axis current command 𝑖^𝑟∗_𝑞𝑠; (f) q-axis current 𝑖^𝑟_𝑞𝑠; (g) d-axis current command 𝑖^𝑟∗_𝑑𝑠; (h) d-axis current 𝑖^𝑟_𝑑𝑠.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)