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

Figure 8

Experimental results of the proposed system in steady state: (a) q-axis current command 𝑖^𝑟∗_𝑞𝑠; (b) q-axis current 𝑖^𝑟_𝑞𝑠; (c) d-axis current 𝑖^𝑟_𝑑𝑠; (d) motor speed 𝜔_𝑟𝑚; (e) q-axis voltage command 𝑣^𝑟∗_𝑞𝑠; (f) d-axis voltage command 𝑣^𝑟∗_𝑑𝑠; (g) output current 𝑖_𝑎𝑠; (h) total harmonic distortion of output current 𝑖_𝑎𝑠.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)