Exxelia célèbre le 10eme anniversaire de sa marque

Exxelia célèbre les 10 ans de sa marque en confirmant une forte croissance.


Exxelia célèbre le 10ème anniversaire de sa marque

@Exxelia #poweringperformance #Exxelia10ans

Le 29 Aout 2019 – Paris, France – Exxelia, leader dans la conception et la fabrication de composants passifs complexes et solutions électromécaniques pour des marchés industriels de pointe, célèbre les 10 ans de sa marque en confirmant une forte croissance.

Le groupe Exxelia est né de la fusion de cinq sociétés bien établies aux activités et savoir-faire complémentaires (Eurofarad, Firadec, Sic Safco, Microspire et Astema). Aujourd'hui, Exxelia compte 13 sites de production situés en France, aux États-Unis, au Vietnam et au Maroc.

Intégrés dans les avions civils et militaires de dernière génération, à bord des missions d'exploration spatiale les plus prestigieuses telles que ChangE4 et Insight, les composants Exxelia ont toujours été la solution de référence lorsque l'environnement est sévère et la fiabilité indispensable.

Paul Maisonnier, PDG d'Exxelia : «Au cours des 10 dernières années, Exxelia a doublé son chiffre d'affaires grâce à une croissance organique soutenue et des acquisitions stratégiques. Nous sommes fiers d'être reconnus  comme concepteur et fabricant de premier plan de solutions standards et spécifiques jouissant d'une réputation de performance et de qualité.

A l'avenir, Exxelia souhaite continuer sur sa lancée et devenir le leader mondial des composants passifs complexes destinés aux applications à haute fiabilité.

Pour consulter les dernières actualités d’Exxelia -> 

Published on 29 Aug 2019 by Rebecca Charles

Exxelia Micropen Expands Manufacturing in Honeoye Falls

To accommodate current and future demand for its technologies, Exxelia Micropen has completed construction to expand its Honeoye Falls facility by more than 20 percent. The 9,000-square-foot addition includes 5,000 square feet of new cleanroom space, enabling the company to double the capacity of its manufacturing operations.   Exxelia Micropen utilizes its proprietary technology to “print” ultra-precise lines of conductive inks on three-dimensional and flexible surfaces, including advanced medical devices. The technology is also used to make high-performance resistors for a wide range of demanding applications in aerospace, imaging, and electronics. Since 2017, the company has experienced double-digit growth every year as demand for its innovative engineering, design, and manufacturing services has escalated.   “As we continue to develop new partnerships to meet the unique needs of customers across the globe, we outgrew our space,” “The expansion allows us to boost our production volumes while we continue to provide the innovative technologies and exceptional service and delivery times that our customers have come to rely on.” said Ed Petrazzolo, CEO, Exxelia Micropen.   Exxelia Micropen partnered with Hamilton Stern Construction and Hanlon Architects for the expansion, which began in the spring. In addition to the manufacturing space, the project includes a new lobby, employee breakroom, and more office space. Parking also grew to a total of 140 spaces.   “The expansion of Exxelia Micropen’s facility is a prime example of the success of our Design-Build service, which provides clients with a cohesive, one-stop-shop experience to save time and reduce costs,” said Justin Hamilton, Principal, Hamilton Stern. “Our close partnership with Hanlon Architects, Marathon Engineering, and Exxelia Micropen enabled this project to be completed in roughly 13 months all while fully maintaining the facility’s production volumes. We are grateful for Exxelia Micropen’s trust in our firm to be part of their continued growth.”   “We are proud of what we have built in Honeoye Falls,” said Petrazzolo. “The talented employees we’re able to recruit from the Rochester area are critical to our success, and the expansion only reinforces our commitment to further develop our presence here. We look forward to a long, prosperous future as part of this community.”

High Voltage Resistor Selection Checklist

Introduction to High Voltage Resistor Selection Checklist The resistor is the most common and well-known passive electrical component. A resistor is a device connected into an electrical circuit to introduce a specified resistance. The resistance is measured in Ohms. As stated by Ohms Law (E=IR), the current through the resistor will be directly proportional to the voltage across it and inversely proportional to the resistance. Resistors have numerous characteristics that determine their accuracy during use. The performance indices affect the accuracy to a greater or lesser extent depending on the application. Some of these indices are: Tolerance at DC, Temperature Coefficient of Resistance (TCR), Voltage Coefficient of Resistance (VCR), Noise, Stability with respect to Time and Load, Power Rating, Physical Size, and Mounting Characteristics. Resistor networks typically require temperature and voltage tracking performance. Please refer to the application note: Glossary of Resistor Terminology for an expanded explanation of resistor terminology. Selection Requirements 1. Determine the resistance in ohms and watts. 2. Determine the proper physical case size as controlled by voltage, watts, mounting conditions, and circuit design requirements. 3. Select the resistor that meets your needs for type, termination and mounting. Step 1 : Determine the resistance in ohms and watts. Ohm’s Law: E=IR or I=E/R or R=E/I Ohm’s Law, as shown in the above formula, enables one to define the voltage (E), current (I), or resistance (R) when two of the three terms are known. When current and voltage are unknown they must be measured in the model circuit.   Power Law: W=I2R or W=EI or W=E2 /R Watts (power) can be determined from the above formulas that are derived from Ohm’s Law. R is measured in Ohms, E in volts, I in amperes, and W in watts. Watts must be accurately determined before resistor selection. Simply stated any change in voltage or current produces a much larger change in wattage (heat dissipated by the resistor). The effects of relatively small increases in voltage or current must be determined because the increase in wattage may be significant enough to influence resistor selection. As stated in the above formulas the wattage varies as the square of the current or voltage. Allowances should be made for maximum possible voltage. Step 2 : Determine the proper physical case size as controlled by voltage, watts, mounting conditions, and circuit design requirements. Power Rating and Physical Size: A resistor operated at a constant wattage will reach a steady temperature that is determined largely upon the ratio between the substrate size (surface area) and the wattage dissipated. Temperature stabilizes when the sum of the heat loss rates (by radiation, convection, and conduction) equals heat input rate (wattage). The larger the resistor surface area per watt to be dissipated, the greater the heat loss rate and therefore the lower the temperature rise. Free Air Wattage Rating (Maximum Power Rating) is defined as the wattage rating of resistors as established under specified standard conditions. The absolute temperature rise for a specific resistor is roughly related to the area of its radiating surface. It is also dependent upon a number of other factors such as thermal conductivity, ratio of length to width, heat-sink effects of mounting, and other minor factors. The precise temperature limits corresponding to 100% rated wattage are somewhat arbitrary and serve primarily as design targets. Once a wattage rating has been assigned on the basis of an empirical hot spot limit, the verification of its correctness must be established through long term load life test (see Application Note: Life Test Data – High Voltage Chip Resistors) based on performance and stability standards rather than the measurement of hot spot temperature. Step 3 : Select the resistor that meets your needs for type, termination and mounting. ✔ Resistor Selection: Select the most suitable resistor that meets the requirements of the application. OhmCraft resistors are made to your specification. Refer to the appropriate data sheet to determine part number or call OhmCraft for assistance. ✔ Wattage Rating: To allow for the differences between actual operating conditions and the Free Air Wattage Rating it is a general engineering practice to operate resistors at less than the nominal rating. ✔ Voltage Rating: Determine maximum applied (working) voltage that the resistor will be exposed to and select the appropriate package size. ✔ Pulse Operation: When a resistor is operated in a pulse application, the total power dissipated by the resistor is a function of the pulse’s duty cycle. Typically, one will define the number of joules of energy the resistor must dissipate and choose a resistor accordingly. For additional information refer to our Pulse Resistor white paper or contact OhmCraft. ✔ High Frequency: OhmCraft resistors, due to their design and construction, have very low capacitance and are inherently a non-inductive design. For additional information refer to our High Frequency Attributes Application Note. ✔ Military and Other Specification: The special physical operating and test requirements of the applicable industrial or military specification must be considered. Contact OhmCraft for additional information. Effect of the power ratings on components All the components of an electrical apparatus including resistors, capacitors, rectifiers, and semiconductors have their own limitations as to the maximum temperature at which they can reliably operate. The attained temperature in operation is the sum of the ambient temperature plus the temperature rise due to the heat dissipation in the equipment. Ambient Temperature Derating, below defines the percent of full load that power resistors can dissipate as a function of ambient temperature. Temperature Coefficient of Resistance Temperature Coefficient of Resistance (TCR) is expressed as the change in resistance in ppm (0.0001%) with each degree of change in temperature Celsius (C). MIL STD 202 Method 304 is often referenced as a standard for measuring TCR. This change is not linear with temperature. TCR is typically referenced at +25C and changes as the temperature increases or decreases. It can be either a bell or S shaped curve. It is treated as being linear unless very accurate measurements are required, then a temperature correction chart is used. A resistor with a TCR of 100 ppm will change 0.1% over a 10-degree change and 1% over a 100-degree change. An example of a TCR curve can be found in the application note: Glossary of Resistor Terminology. The following formula expresses the rate of change in resistance value per 1 C in a prescribed temperature range. TCR (ppm/°C) = (R-R0)/R0 X 1/(T-T0) X 106 - R: Measured resistance (Ω) at T °C - R0: Measured resistance (Ω) at T0 °C - T: Measured test temperature °C - T0: Measured test temperature °C In the context of a resistor network, this TCR value is called absolute TCR in that it defines the TCR of a specific resistor element. The term TCR tracking refers to the difference in TCR between each specific resistor in the network. Voltage Coefficient of Resistance The Voltage Coefficient of Resistance is the change in resistance with applied voltage. This is entirely different and in addition to the effects of self-heating when power is applied. A resistor with a VCR of 100 ppm/V will change 0.1% over a 10 Volt change and 1% over a 100 Volt change. VCR becomes very important in high Ohmic value resistor (100M Ω and above) where typical VCRs can be greater than 1000 ppm/V to specify the voltage that will be applied. Failing to do this may result in a resistor that will not meet your specification. The rate of change in resistance value per 1 volt in the prescribed voltage range is expressed by the following formula: VCR (ppm/V) = (R0-R)/ R0 X 1/(V0-V) X 106 - R: Measured resistance (Ω) at base voltage - R0: Measured resistance (Ω) at upper voltage - V: Base voltage - V0: Upper voltage In the context of a resistor network, this VCR value is called the absolute VCR in that it defines the VCR of a specific resistor element. The term VCR tracking refers to the difference in VCR between each specific resistor network. Please refer to the application note: Voltage Ratio Tracking and Voltage Coefficient of Resistance. Summary When specifying a resistor, the following parameters MAY be of interest. Please use this chart to help you define the operating characteristics for your specific application. All of them may not important for your specific application. Also, please do not hesitate to contact Ohmcraft for application help. At Exxelia Ohmcraft, our commitment transcends the creation of resistors. We are dedicated to empowering the visionary innovations that define the future of military technology. Our team is poised to collaborate and customize solutions that perfectly align with the evolving needs of military applications. In a landscape where reliability is non-negotiable and precision is imperative, Exxelia Ohmcraft stands as the beacon of unwavering support, fortifying military operations with resilient, high-performance resistors. Download our White Paper   Exxelia Ohmcraft’s sister division, Exxelia Micropen Medical is at the forefront of medical device product development, providing design engineers with unique insights on conceiving and implementing new designs and features.