IST2 control for three-phase Varispeed motors

IST2 control for three-phase Varispeed motors

IST2 is a tachometric voltage regulator which operates according to the principle of phase partialisation. The voltage generated by silicon-controlled diodes (SCR) is the result of an analogue process which maintains constant motor revolutions by means of differential control  between the actual speed i.e. the tachogenerator voltage signal and the speed set on the potentiometer or by the external analogue signal ( 10 V). The IST2 operates on four quadrants and therefore is capable of generating drive torque and resistant torque in both directions of rotation with considerably high starting torque.

All controls feature galvanic isolation from the mains. The combination with a FAE VARISPEED asynchronous motor makes for an inexpensive, silent running, simple and reliable variable speed drive suitable for applications where rapid acceleration is required even in the case of considerable inertia loads without auxiliary external braking systems such as brake resistors for inverters or DC motor controllers.

IST2 applications as radio frequency filter, built-in or external versions (request filter or specifications when ordering) comply with general product standards regarding conducted emission and conducted susceptibility. As regards susceptibility on control cables, twice the minimum required protection degree is guaranteed for heavy industry; refer to recommendations for power and control cables in the event of problems caused by electromagnetic interference.

                                                        * = Version with centrifugal fan