Ziehl-Abegg external rotor motors combine the advantages of compact construction with the proven drive concept of a squirrel-cage motor (offered in two material types aluminium for eff2, copper for eff1), or a high efficiency EC motor. Drives from Ziehl-Abegg feature excellent constant speed characteristics. Tailor-made drive solutions for the most varied applications can be realised by operating Ziehl-Abegg motors with matched frequency inverters and EC controllers. These solutions include amongst others: auxiliary drives for printing units, drives for automotive engineering, auxiliary drives for the paper industry, bowling-alley drives and compressor drives.