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  • Author or Editor: Róbert Istók x
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The paper present three measurement systems for compact fluorescent lamps high frequency noise emission and the correspondence between length of power supply cable and the frequency band of radiated noise. First measurement system is the Coupling Decoupling Network system, which measures the common mode current. The second measurement system is the Gigahertz Transverse Electro-Magnetic cell, which measures the near electromagnetic field. The third measurement system is the Antenna system, which measure the far electromagnetic field.

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The electronic devices, which contain single phase rectifiers, have significant harmonics emissions. Modern lamps are driving by electronic ballast, which contains single phase rectifiers. The modern lamps are nonlinear loads and introduce harmonic distortions in power supply lines. In conformity with standard requirements the emission measurements are done for a single lamp during the validation process. In real life more than one lamp is used at the same time in a system. Measurement of more modern lamps in a circuit shows that the harmonics emission in their case is lower than in the case of one lamp.

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The role of light-emitting diode lamps and radio frequency lighting controls is to reduce the energy consumption. The increase of lighting network complexity determines the increase of EMC noise emission. Being familiar with measurement systems is important for making correct measurement and for understanding the results of the measurement. Correct interpretation of measurement results is the first step in choosing the best suppression method. The suppression method depends on the common mode and the differential mode of noise type and on the frequency of signal noise.

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