Filtering Using Electrolytic Capacitors in Automotive Applications

摘要

The replacement of mechanical systems, such as steering, braking and engine valve timing, by electro-mechanically driven actuators has led to a rapid increase in the use of high current switchmode converters in automotive environments. To develop the necessary Electro Magnetic Interference filter components, BCcomponents has worked together with specific automotive customers to develop several 'non-catalogue' products, resulting in new series of long-lifetime high-temperature electrolytic capacitors specially designed to withstand automotive conditions. In addition to meeting the required electrical parameters, the development of these new capacitors has required a closer look at mechanical construction and thermal behaviour. Both packaging and thermal management are major concerns in automotive design, and the solutions that have been developed have required close cooperation with customers to ensure functionality and reliability. By combining BCcomponents' knowledge of components with its customers' systems knowledge, systems have been developed that also meet the cost requirements of the automotive industry.