SINAMICS S120 Functi.. - Gregbotos.com

Operating ModesVector V/f control (r0108.2 = 0)3.3.1 Voltage boostWith an output frequency of 0 Hz, the V/f characteristics yield an output voltage of0 V. The voltage boost must be entered to: Magnetize the induction motor. Maintain the load. Compensate for the losses (ohmic losses in the winding resistors) in the system Generate a breakaway/acceleration/braking torque.The voltage boost can be increased permanently (p1310) or during acceleration(p1311).Permanent voltage boostV_boost permp1310Drv I_output maxr0067V_boost totalr1315V_boost acceleratep1311001Mot I_ratedp03050+ +R_stator activer0395Ramp–up activep1199.0Voltage boost ataccelerationspg_anhebung_gesamt.vsdFig. 3-44Voltage boost totalNoteThe voltage boost affects all V/f characteristics (p1300).NoticeIf the voltage boost value is too high, this can result in a thermal overload of themotor winding.© Siemens AG 2006 All Rights ReservedSINAMICS S120 Function Manual, 03/2006 Edition3-161