rotor bars

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  • Condition Monitoring

Electrical Frequencies Calculation and AC Motor Faults Patterns. Part 2

In the Part 2 the practical example will be analyzed.

Let’s look the background and calculate the most common frequencies produced by motor that potentially will be required for further analysis.

  • Pawel Lecinski
  • CMRP
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  • Condition Monitoring

Rotor Bar Analysis Using Electrical Signature Analysis

Broken or fractured rotor bars are found as elevated Pole Pass Frequency (PPF) sidebands of line fre- quency (LF). PPF is calculated using the synchronous speed minus the running speed times the number of poles..

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