ZF Friedrichshafen AG — Electric Motors for Buses ZF Friedrichshafen AG (often referred to as simply ZF) is a global automotive tier-1 supplier. It supplies electric drivetrains and components for electric buses, and IDTechEx spoke to ZF at BUS2BUS to find out more about its upcoming second generation of motors for the bus and commercial electric vehicle (EV) market. ZF Friedrichshafen AG — Electric Motors for Buses