13th Harmonic Interactive Simulation
See how the 13th harmonic can increase motor/transformer heating, vibration and losses — and how mitigation reduces the problem.
Induction Motor
Transformer
🛠 Harmonic Mitigation
What is the 13th Harmonic?
The 13th harmonic is a voltage or current component whose frequency is 13 times the fundamental frequency. For a 50 Hz electrical system, the 13th harmonic frequency is 650 Hz.
Harmonic currents can increase additional losses in motors and transformers. These losses can appear as extra winding heating, core losses, acoustic noise and mechanical vibration. The actual severity depends on the harmonic magnitude, equipment design, loading and system impedance.
In an induction motor, higher-order harmonic fields can interact with the fundamental field and produce additional torque pulsations and vibration. In transformers, harmonic current can increase winding eddy-current and stray losses, while harmonic voltage can increase core losses.
Typical engineering solutions include harmonic filters, line reactors, suitable converter/drive selection, harmonic-rated transformers, proper system design and measuring the harmonic spectrum with a power-quality analyzer.