The rotor includes the rotor winding as well as rotor core.

The rotor winding is energized by the DC supply. The rotor can be classified into two types namely the phase wound and the squirrel cage. The squirrel cage rotor’s core is made up of cylindrical iron core which has a curved slot over the external surface on which the aluminum or copper conductors are located. These are short-circuited at the endings using the copper or aluminum rings.

The electromagnetic induction is the occurrence wherein the electromagnetic force is induced within the conductor which carries the conductor due to the variable magnetic field. When the current stimulates in the rotor then it causes the rotor to move. Lap winding is the one kind of armature winding. The conductor connection can be done where the lanes and poles are similarly connected. The final part of each armature coil is associated with the commutator. The number of brushes within winding is the same as the number of parallel lanes. These are divided equally into two polarity windings like positive & negative. The lap winding applications mainly involve in high current and low voltage machines. These windings are categorized into three type’s namely simplex, duplex and triplex type winding. Wave winding includes parallel lanes among the two brushed like positive & negative. The primary armature coil’s end part can be associated with the starting part of the next armature coil commutator part with some distance. The conductors in this type of winding can be connected with two parallel lanes in a machine pole. The number of parallel ports can be equal in the direction of the number of brushes, which is used for high-voltage, and low-current machines. Please refer to the link to know more about Lap Winding & Wave Winding. The motor winding wire calculation can be done using an ohmmeter.

Connect the positive terminal of the multimeter which is in red color to the positive terminal of the windings of the motor. Similarly, connect the negative terminal which is in black color to the negative terminal of the windings of the motor.

Motor winding data calculation