ASYNCHRONOUS HOLLOW SHAFT MOTOR FOR UNWINDERS

We are pleased to inform you about new application solved with VASCAT asynchronous servomotors. This time the company has customized a MAC-QI 160 (13kW) motor for a direct drive unwinder in a paper sheeter machine. The main feature of this custom design is the completely therethrough hollow shaft which facilitates the direct coupling of the motor to the spool shaft thereby simplifying the mechanical design. The motor also incorporates an specific low speed winding (304 rpm) in order to reduce nominal consumption of the motor so the size of the inverter is optimized. In addition to this, using an asynchronous motor offers significant advantages in rewinding applications compared with synchronous solution because it allows working in field weakening mode without injecting additional current.