Variable speed control for electronic drives is a main factor for increasing energy efficiency in machine engineering. With the newly developed EFC 3600 variable frequency drive series, Bosch Rexroth offers the economic benefits for general automation, material handling and pumps, fans and compressors, which had up to now been operated continuously and inefficiently. The frequency converter improves the process control through integrated PID controllers as well as through a sequence control system with eight steps.The settings enable an energy efficient operation of equipment and machines at their optimal operating point. Due to its high intermittent overload capacity of up to 200 percent as well as the high initial torque of up to 150 percent, the device can be used for a wide range of applications with the most varying requirements. The freely scalable V/f characteristic allows load-dependent adjustment of the voltage/frequency curve, which ensures a longer motor service life.