/conductor-ampacity-and-sizing

  Procedure & Important Terms for Selecting AC Motors The motor type selected for a given application is determined by the features required, which include: ·          The energy source,  ·          System specifications,  ·          Motor type,  ·          Kind of motor insulation,  ·          The duty cycle of a motor  ·          Kind of bearing,  ·          The motor mounting technique,  ·          The motor's price and size,  ·          Method of regulating Speed,  ·          Environmental circumstances. Important...

  Various AC Motor Types  AC motors can be equipped with variable frequency drives , but the improved speed control comes with reduced power quality. Types of AC Motors: AC motors divided into three broad categories: ·          Induction   motor ·          Synchronous motor ·          Linear Motor.       1- Induction motor  Voltage is induced in the rotor, the magnetic field to allow for an induced voltage   Slip: Torque can only occur if the shading ring has an induce current. It is find by the current in the ring and exist if there’s flux variation.  S= (N syn – N m )/ N syn Synchronous speed (N syn ), shaded ring speed (N m ), “slip” (s) Slip control and operation of induction machines.  s = 0:   rotor run at synchronous speed.  s = 1:     rotor is stationary . ...