For serial wound motors, exactly the opposite applies. There is no defined idling speed and their speed under loading reduces more than in shunt wound motors. These motors do, however, offer a high starting torque. They therefore withstand high loads during short periods of operation and are thus also used in starter motors of, for instance, electric locomotives.
The compound motor combines the advantages of the shunt and serial wound motor. With a balanced rapport between speed and torque it is, for instance, used for drives of presses and punching machines.
Permanent magnet excited motors offer the advantage of not requiring any energy for generating a magnetic field. This improves the efficiency in particular in case of a low overall output. At the same time, these motors require little space. Also there are no losses from the excitation windings, as these are replaced by magnets
CEDS Duradrive offers you numerous solutions. From spur to cycloidal gears. And where a special solution is needed for a special requirement, we will provide exactly that. For instance by combining the advantages of different types of gears.
Servo converters, on the other hand operate dynamically. This ensures a high speed accuracy. As usual for servo motors, the specified speed is attained and maintained. The speed can also be quickly changed. To allow other different applications, servo motors have a modular design. A second transducer system can, for instance be integrated.
Universal converters combine the characteristics of frequency and servo converters. They can be operated with a simple speed control or speed feedback. Universal converters operate with a current recuperation, making them particularly energy efficient. In this way an asynchronous motor can be operated as a generator. The energy generated, for instance, during braking of an electrical locomotive is fed back into the grid and is thus not lost. The same also applies to motors of centrifuges or elevator drives.