Research Article

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

Table 1

Range of sideband frequencies in terms of faulty types.

Fault typesTheoretical formula Range Frequencies

Air-gap eccentricity Low, high0~900 Hz
Broken rotor bars Low0~400 Hz
Bearing failure High0~2000 Hz
Interturn short circuit ,  Low, high0~1000 Hz