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Harmonics in the context of electrical systems refer to sinusoidal components of the electrical waveforms that have frequencies that are integer multiples of the fundamental frequency.
The effect of harmonics at the performance of 3-pahse induction motors may be huge and can appear in numerous approaches:
Increased Heating:
Harmonics can result in accelerated heating in the motor windings and core.
The extra harmonic currents contribute to extended losses in the shape of resistive heating, potentially main to overheating issues.
Reduced Efficiency:
Higher harmonic currents can purpose additional losses inside the motor, reducing its basic efficiency.
The performance of the motor may additionally lower because of increased heating and extra losses associated with harmonics.
Torque Pulsations:
Harmonics within the contemporary waveforms can lead to torque pulsations within the motor.
Torque pulsations can bring about mechanical vibrations, noise, and potential damage to the mechanical components of the motor and related equipment.
Increased Stray Losses:
Stray losses, such as eddy contemporary and hysteresis losses, can increase because of the presence of harmonics inside the magnetic middle.
This can make contributions to extra heating and decrease the overall efficiency of the motor.
Voltage Distortion:
Harmonics in the voltage waveform can cause distorted voltage stages throughout the motor terminals.
Voltage distortion can affect the motor's potential to supply a smooth and constant torque, impacting its performance and doubtlessly inflicting instability.
Resonance Issues:
The presence of harmonics can cause resonance problems inside the motor and the linked strength device.
Resonance can make bigger harmonic currents and voltages, leading to greater intense problems in the motor and different related gadget.
Increased Stress on Insulation:
Harmonics can purpose stress on the insulation of motor windings.
The improved strain can boost up insulation getting old and breakdown, leading to ability motor failures.
