Feature: System Design
Overcoming common dynamic
braking resistor challenges Ensuring smooth operation for electric drive systems
I
carefully managed to prevent damage. T is is where dynamic braking resistors (DBRs) come into play. Here, Mike Torbitt, managing director of resistor manufacturer Cressall, off ers advice on overcoming some of the most common DBR challenges to ensure reliable performance, even for heavy-duty applications. An integral component within electric
By Mike Torbitt, managing director of resistor manufacturer, Cressall Material quality is key Since DBRs repeatedly process large amounts of kinetic energy, there is a risk that they could overheat. T is could degrade materials over time or even create a fi re hazard. To avoid this, it is essential that resistors are built to withstand high thermal stress and eff ectively dissipate energy at the
n the modern age of manufacturing, the operational effi ciency and precise control of electric drives, help to keep systems running smoothly. However, when an electric drive brakes, the excess energy generated must be
required rate for the application. T e resistive elements of DBRs are oſt en made with stainless steel, as it is highly resistant to heat, corrosion and oxidation. With high chromium and nickel content, 304 and 316 grade stainless steel both have excellent resistive properties but the optimal stainless-steel alloy varies depending on the
drive systems, a DBR converts excess energy generated during braking into heat, which it then safely dissipates to prevent the drive from overloading. For high-power applications such as hoists, cranes, industrial machinery and railway systems, it is critical that DBRs can consistently and rapidly dissipate large amounts of energy. So, how can manufacturers ensure they select a suitable DBR for such demanding applications?
26 November 2024
www.electronicsworld.co.uk
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