Analysis of electromagnetic interference from power system processing and transmission components for Space Station Freedom

The goal is to analyze the potential effects of electromagnetic interference (EMI) originating from power system processing and transmission components for Space Station Freedom.The approach consists of four steps: (1) develop analytical tools (models and computer programs); (2) conduct parameterization studies; (3) predict the global space station EMI environment; and (4) provide a basis for modification of EMI standards

Pengendalian Electromagnetic Interference (EMI) Printed Circuit Board (PCB) Dalam Perkembangan Peralatan Elektronik

Electromagnetic Interference (EMI) merupakan persoalan dalam sistem maupun subsistem. Perkembangan produk elektronik dengan menggunakan sistem desain elektronik digital dan dengan menerapkan komponen microprocessor bertambah pesat, maka desain produk elektronik terutama yang menggunakan sistem rangkaian digital merupakan sumber Electromagnetic Interference (EMI), yang dapat mengganggu pengoperasian produk elektronik yang berada disekitarnya. Komponen –komponen elektronik yang terpasang pada Printed Circuit Board (PCB) akan saling berinteraksi satu dengan yang lain yang juga merupakan sumber EMI dan dapat mempengaruhi kinerja (performance) dari sistem produk elektroniknya sendiri. Persoalan EMI diatas dapat dikendalikan dengan mengurangi pancaran radiasi elektromagnetik dari komponen –komponen yang ada dalam sistem suatu produk. Dalam paper ini , dibahas mengenai sumber noise yang timbul dari PCB dan sistem pengendalian EMI yang dilakukan melalui PCB.Kata kunci EMI, PCB, Radiasi Electromagnetic

Analysis of electromagnetic interference from power system processing and transmission components for Space Station Freedom

The goal of this research project was to analyze the potential effects of electromagnetic interference (EMI) originating from power system processing and transmission components for Space Station Freedom. The approach consists of four steps: (1) developing analytical tools (models and computer programs); (2) conducting parameterization (what if?) studies; (3) predicting the global space station EMI environment; and (4) providing a basis for modification of EMI standards

Pengendalian Electromagnetic Interference (EMI) Printed Circuit Board (PCB) dalam Perkembangan Peralatan Elektronik

Electromagnetic Interference (EMI) merupakan persoalan dalam sistem maupun subsistem. Perkembangan produk elektronik dengan menggunakan sistem  desain elektronik digital dan dengan menerapkan komponen  microprocessor bertambah pesat, maka desain produk elektronik terutama  yang menggunakan sistem  rangkaian digital merupakan sumber Electromagnetic Interference (EMI), yang dapat mengganggu pengoperasian produk elektronik yang berada disekitarnya. Komponen –komponen elektronik yang terpasang pada Printed Circuit Board (PCB) akan saling berinteraksi satu dengan yang lain yang juga merupakan sumber EMI dan dapat mempengaruhi kinerja (performance) dari sistem produk elektroniknya sendiri. Persoalan EMI diatas dapat dikendalikan dengan mengurangi pancaran radiasi elektromagnetik dari komponen –komponen yang ada dalam sistem suatu produk. Dalam paper ini , dibahas mengenai sumber noise yang timbul dari PCB dan sistem pengendalian EMI yang dilakukan melalui PCB.Kata kunci EMI, PCB, Radiasi Electromagnetic

A three-switch high-voltage converter

A novel single active switch two-diodes high-voltage converter is presented. This converter can operate into a capacitor-diode voltage multiplier, which offers simpler structure and control, higher efficiency, reduced electromagnetic interference (EMI), and size and weight savings compared with traditional switched-mode regulated voltage multipliers. Two significant advantages are the continuous input current and easy isolation extension. The new converter is experimentally verified. Both the steady-state and dynamic theoretical models are correlated well with the experimental dat

Accurate Extraction of Noise Source Impedance of an SMPS Under Operating Conditions

An accurate measurement method to extract the common mode (CM) and the differential mode (DM) noise source impedances of a switched mode power supply (SMPS) under its operating condition is developed and validated. With a proper pre-measurement calibration process, the proposed method allows extraction of both the CM and the DM noise source impedances with very good accuracy. These noise source impedances come in handy to design an electromagnetic interference (EMI) filter for a SMPS systematically with minimum hassl

Stop That Noise

The authors discuss electromagnetic compatibility (EMC) and electromagnetic interference (EMI). After a brief look at the causes of EMI, they describe conductive coupling and electromagnetic radiative coupling. Career opportunities in EMC problem solving are looked at

EMI suppression in heat sinks

Heat sinks are designed to dissipate heat; however, their shapes often lend themselves to radiating electromagnetic energy, which leads to unwanted electromagnetic interference (EMI). This disclosure describes heat sinks that minimize electromagnetic interference at particular design frequencies

Common approach to solving SGEMP, DEMP, and ESD survivability

System Generated Electromagnetic Pulse (SGEMP) and Dispersed Electromagnetic Pulse DEMP) are nuclear generated spacecraft environments. Electrostatic discharge (ESD) is a natural spacecraft environment resulting from differential charging in magnetic substorms. All three phenomena, though differing in origin, result in the same problem to the spacecraft and that is Electromagnetic Interference (EMI). A common design approach utilizing a spacecraft structural Faraday Cage is presented which helps solve the EMI problem. Also, other system design techniques are discussed which minimize the magnitude of these environments through control of materials and electrical grounding configuration

A New High-Current Large-Bandwidth DC Active Current Probe for Power Electronics Measurements

International audienceThis paper is focused on the design and the realization of two high-current probes (up to 100 A) whose bandwidths range from dc to 50 MHz. The performance has been met by the association of an active Hall sensor and a passive current transformer. This association will be named an "active current transformer." It will be shown that it has better frequency performance than the classical closed-loop current transducer, usually used for high-current measurements but frequency limited. The electromagnetic interference (EMI) issues, due to the sensor electrical environment are respected thanks to the shielded structure and special inner arrangements of the Hall sensors. Because of its large bandwidth, its large current range, and its EMI ruggedness, this current probe is well matched to power electronics measurements. Index Terms-Current probe, current transformer, electromagnetic interference (EMI), Hall sensor, power electronics