CAN總線：以電動汽車和PHEVs發揮更大的作用

　　CAN總線技術在協調在今天的化石智能子系統的幾十個已經發揮了關鍵的作用為燃料的汽車和卡車，但他們將更為重要，明天的電動汽車（EV）成功，插入式混合動力電動汽車（PHEV），和其他節能的運輸系統。功能要求的汽車電池，充電系統和電動傳動系統的實施，提出了新的挑戰，對CAN總線技術（圖1）和設計師誰使用它。本文將研究這些挑戰，并看看下一代的CAN總線產品的出現，以滿足他們。

　　圖1：大多數混合動力和電動汽車將依靠CAN總線連接電池，能量管理和動力元件為敏感，集成系統。（三菱工業提供）

　　New applications for a mature technology

　　Introduced by Bosch in the mid-1980s for in-vehicle communications， the Controller Area Network bus （CAN bus） is a standard that allows microcontrollers and other devices to communicate with each other within a vehicle （or other network） without a host processor. Its robust differential signals are carried on small-gauge twisted-pair cabling that is much lighter and less costly than the bulky wiring harnesses it usually replaces. CAN bus’s low cost and high reliability helped make it the de facto control interface for the growing number of digitally-controlled powertrain， body electronics， safety and “infotainment” subsystems in conventional vehicles. Now， it will take on new roles in the battery management systems （BMS）， battery charging （regenerative and plug-in modes）， motor drive controllers， inverters， and the multiple DC/DC converters used in both EVs and PHEVs.