Arwa electronics provides ac induction motors. These ac induction motors are of type squirrel-cage. The name comes from the fact that the rotor or secondary resembles the wheel of a squirrel cage. These motors are manufactured with characteristics to suit most industrial requirements . The universal use lies in the mechanical simplicity, ruggedness.. A squirrelcage motor consists essentially of two units, namely stator and rotor. The stator [or primary] consists of a laminated sheet-steel core with slots in which the insulated coils are placed. The coils are so grouped and connected as to form a definite polar area and to produce a rotating magnetic field when connected to a polyphase alternating current circuit. The rotor [or secondary] is also made of steel laminations, but the windings consists of conductor bars placed approximately parallel to the shaft and close to the rotor surface. These windings are short-circuited or connected together at each end of the rotor by a solid ring. The speed of a squirrel-cage induction motor is nearly constant under normal load and voltage conditions, but is dependent on the number of poles and the frequency of the ac source.
