How Harmonics Are Generated

Rectifier: A half-wave rectifier, which removes only one half of the AC wave, generates both odd and even harmonics. A full-wave rectifier, on the other hand, can eliminate even harmonics while also reducing the amplitude of odd harmonics.
2. Nonlinear Load: Nonlinear loads respond to input signals in a non-linear manner. This non-linear response can distort the input signal, leading to harmonic components appearing in the output signal.
3. Rotating Electric Motor: The nonlinear characteristics of the stator core in motors and generators can produce significant harmonics, particularly in high-density piercing scenarios.
4. Gas Discharge Lamps: Fluorescent lamps and silver produce small electrical arcs, which, when combined with ballasts, generate harmonics, particularly the third harmonic.
5. Arc Equipment: Such as arc and arc welding machines, which exhibit variable load characteristics, require the absorption of harmonic currents from the power system during each half-cycle period.
6. Inductive Heater: An inductive heater generates a circulating current within the metal, heating it. Simultaneously, the magnetic fields produced by the circulation interact, creating harmonics.