Exxelia Ohmcraft High voltage resistors in 3D dental imaging

To ensure the reliability of 3D imaging used by dentists, CBCT system manufacturers have relied on Exxelia Ohmcraft's custom high voltage resistors.


To capture adequate images of a patient’s teeth and jaw, dentists rely on advanced 3D imaging from cone-beam computed tomography (CBCT) systems. The CBCT system’s outputs are critical for the accurate diagnosis of oral health concerns and subsequent plans for treatment. To ensure the reliability of these images, manufacturers of CBCT systems have leveraged Exxelia Ohmcraft’s custom, high voltage resistors.

“In general, X-Rays require very high voltages to operate and generate clear, precise 3D images,” said Eric Van Wormer, Vice President of Exxelia Ohmcraft. “Because of the unmatched precision and control in surface-mount and leaded resistors from Exxelia Ohmcraft, manufacturers of this type of technology have turned to us to help ensure the reliability of their systems and the quality of the images they produce.”

CBCT systems are used to assist dentists in a variety of procedures, including dental implant placement, root canal therapy, the treatment of temporomandibular joint (TMJ) dysfunction, and oral surgery.

Exxelia Ohmcraft’s technology utilizes the proprietary Micropen electronic printing system to “print” precise, narrow, serpentine lines with resistive ink on a ceramic substrate, producing higher performance resistors over a wider range of values on a smaller surface area than is possible with conventional film resistor technology.

Publié le 17 Mar 2021 par Valentine Taffineau

Exxelia à Railtex 2017

Felsic HV, long lifetime and high voltage screw terminal aluminum electrolytic capacitor The Felsic HV family of aluminum electrolytic screw terminal capacitors provides great performances in energy density and ultra-long lifetime. For instance, 6 800µF @450V fit into a  volume of Ø77 x 220mm  and can withstand 200,000h between 0 to 70° under 37Amps, which makes them the perfect choice for use in rolling stock traction systems or the CVS. The family also has one of the lowest ESR for aluminum capacitors with less than 10m0hms in most cases. Products are available for voltages from 160 to 450 Vdc, and offer capacitance values from 1500μF up to 47 000μF offering the best compromise between reliability and compacity.     Snapsic HV, high voltage snap aluminum electrolytic capacitor Because it covers voltages from 16 to 500Vdc and temperatures up to +105°C, and because it is customizable, the Snapsic HV series is very versatile and can cover all needs of energy storage in medium voltage both in rolling stock equipment or signaling systems. Thanks to its high ripple current, it is often used in SMPS and HVAC rolling stocks units with a typical variation of 470µF @450V in Ø35 x 50mm, as well as in various signaling control units, where a smaller package can be used with for example 1 000µF @250V in Ø35 x 40mm.   Prorelsic, the long lifetime axial aluminum electrolytic capacitors for signaling equipment Exxelia’s range of aluminum electrolytic solutions would not be complete without the axial leaded Prorelsic series. These capacitors show high ripple current and extra-long life-time with 20 000h @105°C. The most common sizes are Ø8.5 x 19mm, Ø10 x 19mm and Ø12 x 30mm, with typical values of 47µF @40V, 100µF @25V and 47µF @100V respectively. Prorelsic capacitors are perfectly suited for smoothing, coupling/decoupling and energy storage functions in railway signaling equipment.

Retour sur notre présence au salon Electronica 2022

Pôle « Produits embarqués » Rassemblant les composants pouvant être montés sur un satellite, un radar ou un avion, nous avons pu présenter deux innovations particulièrement adaptées aux défis de l’aviation du futur et des objectifs de décarbonation de l’aérien avec notre dernière innovation de condensateur film : MML™. Aux côtés des composants MML™, nous avons exposé les dernières innovations en matière de composants magnétiques, permettant de gagner jusqu'à 40% de poids et 20% de volume tout en dissipant plus de puissance, et dont certains ont été conçus pour des applications eVTOL, ainsi que les transformateurs multi-sorties CCM & Dual Active Bridge. Pôle « Ferroviaire & Energie » Nous avons exposé pour la première fois les condensateurs Alcon. Alcon est l'un des principaux concepteurs et fabricants indiens de condensateurs aluminium électrolytique et film, standards et sur-mesure, pour marchés de niche. Alcon fournit notamment de nombreux composants présents à bord des trains, des bornes de recharge électrique ou de systèmes de génération de puissance. Les condensateurs film et céramique d’Exxelia pour les systèmes de signalisation, ainsi que des transformateurs de courant et de mesure, et des résistances ont été aussi en démonstration. Pôle médical Les composants Exxelia Micropen & Exxelia Ohmcraft  ont été aussi présentés à Electronica pour la toute première fois avec une offre exceptionnelle pour le secteur médical. En effet, la technologie d'impression additive unique Exxelia Micropen est largement utilisée pour le matériel médical jetable tel que les tubes endotrachéaux ou les outils d'ablation chirurgicale, et les résistances haute tension  sont utilisées dans les équipements de laboratoire tels que les spectromètres de masse ou les thermocycleurs.