Austrian manufacturer of power resistors, EBG have developed new material combinations and processing methods to achieve a thermal coefficient of resistance (TCR) of +/- 5 ppm while maintaining the minimal voltage coefficient of resistance (VCR).
Leading-edge capability with resistive inks and sintering
The SHP series is a new generation of high-precision and high-stability resistors have already been implemented in applications such as in medical power supply units. “To produce such ultra-high precision HV resistors requires leading-edge capability in the use of resistive inks in combination with the sintering process.” Says Louis Klein of EBG.
From 100 MΩ to 250 MΩ
The Non-Inductive SHP series of power resistors currently includes SHP39, SHP52 and SHP78. The series offers a 10 kV operating voltage with a tolerance range ± 1 % to ± 0.1 %. The ohmic range is from 100 MΩ to 250 MΩ though other ranges are possible on request. The overall stability is ± 5ppm/°C from +25 to 65°C (including TCR and VCR)
“Achieving a stability of 5ppm over temperature including the TCR and VCR is a big deal at 10kV”, says Phil Surman – sales director at PPM Power. “and every resistor comes with stability data collected in 10degree steps.”
Typical applications for the SHP series include medical power supplies, motor drives and controls, X-ray, converters and energy regeneration.
The next generation currently in development promises broader thermal application areas and even higher thermal stability are currently in development.
EBG are based in Kirchbach-Zerlach