Conducted emission measurements for a laptop

Nicolae, Petre-Marian; Stoica, C.I.; Mihai, George

doi:10.1109/icate.2014.6972659

Cited by 9 publications

(5 citation statements)

References 2 publications

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“…According to Figures 10 and 11, the EUT passed the tests concerning radiated emissions for both types of polarization: horizontal and vertical. All the tests accomplished for other types of portable equipment in order to test the compliance with the standards in force for the conducted and radiated emissions proved that the limits imposed by the EMC standards were not exceeded [21,40,41].…”

Section: Discussionmentioning

confidence: 99%

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Power Quality and Electromagnetic Compatibility Aspects at Personal Computers

Nicolae

2022

Energies

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In this article, issues related to electromagnetic compatibility and energy/power quality for a laptop are addressed. Power quality problems are outlined. Testing frameworks (developed by authors) are presented and discussed for a laptop when two different sampling frequencies are used: 80 kHz and 19.2 kHz. Waveforms corresponding to the voltage across the laptop’s terminals and current absorbed by it were acquired. Recordings and numerical processing, based on original software using Fast Fourier Transform, are discussed, and the analysis of waveforms in both cases is performed. Various power quality indices were calculated. Theoretical and practical aspects related to the determination of power quantities, power flows, and power factor are presented. Some conclusions concerning different ranges of frequencies are presented, along with some considerations for power quality problems. Tests for conducted emissions (single phase and neutral wire respectively) and for the radiated emissions (for horizontal and vertical polarizations) are presented. Comparisons to the emission standards were made. The immunity behavior for a laptop is discussed according to immunity standards. It is shown that new measures (e.g., active filters) are necessary for network protection when connecting a laptop to the network. Some considerations, based on the authors’ observations concerning new standards for power quality and electromagnetic compatibility, are outlined.

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Section: Discussionmentioning

confidence: 99%

“…The influence of this equipment over people is not properly quantified, and the limits of CISPR 22 are not correct for this type of equipment. A reconsideration of this standard must be done considering this point of view [40,41].…”

Section: Discussionmentioning

confidence: 99%

Power Quality and Electromagnetic Compatibility Aspects at Personal Computers

Nicolae

2022

Energies

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“…Electromagnetic Compability (EMC) adalah kemampuan perangkat atau produk elektronika dalam melindungi diri dari lingkungan elektromagnetik dan kemampuan perangkat tersebut agar tidak menghasilkan emisi elektromagnetik yang dapat mengganggu perangkat lainnya [22]. Electromagnetic Interference (EMI) merupakan emisi elektromagnetik yang diakibatkan oleh sumbersumber noise melalui gelombang radiasi maupun konduksi elektromagnetik [23].…”

Section: Pendahuluanunclassified

Shielding Elektromagnetik Tembaga dari Proses Elektrolisis Air Limbah Industri Printed Circuit Board

Wirapraja¹,

Cahyono²,

Ali³

2020

JTBBT

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Some electronic products have high electromagnetic interference so that it gives a negative impact on the electronic devices around it. The use of electromagnetic shielding is a solution to reduce the value of electromagnetic radiation interference from electronic products. The research conducted includes the manufacture of electromagnetic shielding from copper material resulting from the electrolysis process of PCB (Printed Circuit Board) industrial wastewater and analyzing the effect of electromagnetic shielding from copper waste on the value of radiation emission. Electromagnetic shielding is made of vinyl which is coated with copper as a result of the electrolysis of PCB industrial wastewater. The measurement results show that electromagnetic shielding from copper waste can reduce radiation emissions. The use of electromagnetic shielding from copper waste is effective at frequencies from 250 to 350 MHz with a decrease in the quasi-peak value of 38.02 dB. The measurements with horizontal antenna polarization show that the margin of radiation emission value is higher comparated to vertical antenna polarization.Sebagian produk elektronika memiliki gangguan interferensi elektromagnetik yang tinggi, sehingga berdampak kurang baik terhadap perangkat elektronika di sekitarnya. Pemanfaatan shielding elektromagnetik menjadi solusi untuk mengurangi nilai gangguan radiasi elektromagnetik yang dimiliki oleh produk elektronika. Penelitian yang dilakukan meliputi pembuatan shielding elektromagnetik dari bahan tembaga hasil dari proses elektrolisis limbah industri PCB (Printed Circuit Board) dan melakukan analisa pengaruh shielding elektromagnetik dari limbah tembaga terhadap nilai emisi radiasi. Shielding elektromagnetik terbuat dari bahan vinyl yang dilapisi dengan tembaga hasil elektrolisis limbah cair industri PCB. Hasil pengukuran menunjukkan bahwa shielding elektromagnetik dari limbah tembaga dapat menurunkan emisi radiasi. Penggunaan shielding elektromagnetik dari limbah tembaga efektif di frekuensi 250 – 350 MHz dengan penurunan nilai quasi-peak sebesar 38,02 dB. Pada pengukuran dengan polarisasi antena horisontal, margin nilai emisi radiasi lebih tinggi jika dibandingkan dengan polarisasi antena vertikal. Kata Kunci: Shielding elektromagnetik, Emisi radiasi, Tembaga, PCB

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“…EMC (Electromagnetic Compability) adalah kemampuan perangkat dalam melindungi diri dari lingkungan elektromagnetik serta kemampuan perangkat itu sendiri agar tidak menghasilkan emisi elektromagnetik [16]. EMI (Electromagnetic Inference) merupakan emisi yang diakibatkan oleh sumber-sumber noise melalui radiasi maupun konduksi elektromagnetik.…”

Section: Pendahuluanunclassified

Emisi Radiasi Stabilizer Gimbal Genggam Pada Frekuensi 30 MHz – 1 GHz Dan 1 – 6 GHz

Wirapraja¹

2020

Jur. Tek. Pros. & Inov. Ind.

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Conducted emission measurements for a laptop

Cited by 9 publications

References 2 publications

Power Quality and Electromagnetic Compatibility Aspects at Personal Computers

Power Quality and Electromagnetic Compatibility Aspects at Personal Computers

Shielding Elektromagnetik Tembaga dari Proses Elektrolisis Air Limbah Industri Printed Circuit Board

Emisi Radiasi Stabilizer Gimbal Genggam Pada Frekuensi 30 MHz – 1 GHz Dan 1 – 6 GHz

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