C380S - Bidirectional drive

The 380S drive was designed to control the speed of Rowan high slip (S series) motors, which are equipped with a tachometrical dynamo; it is a three phase voltage regulator with tachometrical feedback, which uses controlled diodes (SCR) piloted by a phase chocking system. The voltage that pilots the motor is the result of an analogic process, that maintains constant revolutions by means of differential control of the actual motor speed, obtained from the tachometrical generator, and that set by a potentiometer or by an external analogic signal.

Combined with a Rowan high slip three phase motor it creates a extremely quiet and uniform system with constant speed and coupling , from zero until maximum motor revolutions. The choice of controlled diodes for the power section (moreover already over dimensioned) guarantees reliability in case of extra voltage or extra current. The 380S driver is bidirectional, the motor speed and sense of rotation are set respectively to the value and the polarity of the reference signal with a maximum range of ±10VDC.

The operation is extended to all of the 4 quadrants; the combined motor is able to generate a motion couple and braking couple in both senses of rotation with a peak capacity of up to 3 times the nominal couple . 

The ROWAN 380S+ high speed motor system is particularly indicated therefore for fast movements (e.g.: axle control) also with large inertial loads, not needing any external device such as the braking resistance used for frequency control of normal asynchronous motors or for DC motor drivers.