... Technical Conventions (SimPowerSystems™) text://31 of 4 1/21/2014 9:43 AM Per UnitOn this page…What Is the Per Unit System?Example 1: Three-Phase TransformerExample 2: Asynchronous MachineBase ... arewhere current, voltage, and flux linkage are expressed respectively in volts, amperes, and volt-seconds.For AC machines, the torque and speed can be also expressed in pu. The following base ... small machines, H is lower. For example, for a 3 HP motor, it can be between 0.5 and 0.7 second. Back to TopExample 1: Three-Phase TransformerConsider, for example, a three-phase two-winding...