EAK RESISTOR

  As electric vehicles (EVs) continue to dominate the automotive landscape, pulse resistors—critical for managing high-energy transients in pre-charge, discharge, and braking systems—play a pivotal role in ensuring safety, efficiency, and longevity. These components absorb surges, limit inrush currents, and dissipate excess energy, preventing damage to capacitors, contactors, and batteries. Drawing from industry reports and engineering analyses, this article explores three compelling case studies showcasing pulse resistors in action. From high-voltage pre-charging in production EVs to custom solutions for performance vehicles and regenerative braking enhancements, these examples highlight tangible benefits like reduced component wear, improved energy recovery, and up to 12% efficiency gains. Case Study 1: Optimizing Pre-Charge Circuits for 400V EV Systems In a typical EV powertrain, closing the main contactors onto the inverter can cause massive inrush currents into downstream capa...

  When it comes to high-power electronics — from EV fast chargers and industrial inverters to laser systems and rail traction — traditional air-cooled resistors hit thermal limits fast. Enter the next evolution: water-cooled thick film resistors built on Aluminum Nitride (AlN) or even synthetic diamond substrates . These aren’t just components — they’re thermal engineering breakthroughs. Why Thick Film? Why Water-Cooled? Thick film resistor technology — known for its cost-efficiency, design flexibility, and reliability — is now scaling into ultra-high power applications. By screen-printing resistive pastes (typically ruthenium oxide-based) onto ceramic substrates and firing at high temperatures, manufacturers achieve precise resistance values with excellent pulse-handling and high-frequency (low-inductance) performance. But when power demands exceed 500W — or even 5,000W — passive cooling fails. That’s where integrated liquid cooling changes the game. Liquid channels machined into...