EXXELIA at PCIM 2019

Exxelia will exhibit custom design power transformers and inductors as well as capacitors at PCIM in Nuremberg, Germany, from May 7th to 9th 2019 in booth #136.


Notable at Exxelia’s booth #136 will be custom design power transformers & inductors such as: 

FERRITE TRANSFORMER 100kVA-20kHz

This transformer combines high power up to 100kVA, at very high frequency 20kHz, while still providing a weak leakage inductance. Used in an isolated DC/DC converter, its unique morphology made of U and I 126 magnetic circuit improves considerably thermal dissipation while the litz wire winding reduces high frequency losses. Characterized by a primary circuit at 540V / 350Arms and a secondary winding at 270A, this transformer ensures high performance and maximum leakage current reduction.

3 PHASE INDUCTOR 3x5,5mH-9kHz 

Used in a high performance converter, this three-phase common mode choke withstands the highest current up to 580A thanks to the use of copper bar for winding while ensuring a minimal inductance of 1,4mH and filtering the far-reaching noise. This deisgn is characterized by its extreme reliability thanks to its magnetic circuit made of 24 nanocrystalline tores, chosen to guarantee a stable inductance value across the temperature range -30°C to +140°C.

Published on 18 Apr 2019 by Rebecca Charles

What is a capacitor ?

▲ WHAT IS A CAPACITOR ?   Definition from the dictionnary: « Capacitor »: Device able to accumulate charges and to relaunch them in a very short time.    > See our capacitors in catalog    What it really is: It's an electrical component made of 2 conductive armatures (called electrodes) separated by an isolating layer. Its main property is to store electrical charges on its armatures. There is a direct link between the voltage put on the capacitor and the value of the charge at the armatures This coefficient C, the capacitance, is the value caracterizing mathematically the capacitors. As we can identifie a direct link between U and I in the capacitor we can caracterize it as a dipole this way: 3 main dipoles : In the physical reality:   Contacts with the PCB (terminations) + Other internal contact suh as the metallic contacts, or the physical internal resistivity of the used materials. → Resistance in the circuit   Other losses due mainly to the leads → inductive effect in the circuit. Example of possible caracterization: That’s why the Esr is always written « at a certain frequency »  which should be the resonnance frequency. This is also why the capacitors have frequency optimal ranges. The higher the resonance frequency is, the higher the frequencies are withstanded by the capacitor.   In terms of energy Efficient energy is Ec.   In reality E= Ec+Er+Ei with: Ec = Energy due to the ideal capacitor Er = Energy to the ESR Ei = Energy due to the leakage.   So Er and Ei are caracterized by heating (Joule effect). So even if that’s not always a key paramter, the lower the esr the better it is for the circuit.                                                                                                                                                                               If the capacitor is polarized : If the capacitor is not polarized : > See our capacitors in catalog   ▲ MAIN CARACTERISTICS 1) Voltages (V) 2) Capacitance of Capacitor   3) Capacitance / volume 4) Tan Delta / ESR   5) Price of the function Whatever the function, the price of capacitors is important ! A cheap function does not mean a cheap product: 10 caps at 10€ is less expensive than 1 cap at 50€ …    > See our capacitors in catalog   ▲ FINAL OVERVIEW   Technology                                         Benefits of capacitors                          Constrains  Aluminum The least expensive The highest energy density Polarized Difficulties in storage High ESR and tan Delta Lowest temperature range  Ceramic   Ideal for high frequencies The biggest range of values (CAPA voltage)   Highest Price of the functions Low energy density Low values of capacitance  Film Highest ripple curents Highest voltages Lowest ESR and tan Delta Most expensive Lowest energy density High price of the function  Tantalum Lower ESR than aluminum, Good energy density and price of the function Polarized Solid can burn High ESR and tan Delta       > See our capacitors in catalog