Practical Aspects of Broken Rotor Bars Detection in PWM Voltage-Source-Inverter-Fed Squirrel-Cage Induction Motors

Figure 9

Power spectrum of the stator current around different excitation frequency of (a) 45 Hz, (b) 40 Hz, (c) 32 Hz, and (d) 20 Hz.

(a)

(b)

(c)

(d)