General information about the Laboratory: Electrical machines laboratory is concerned with the process of conversion of electrical energy into mechanical energy and vice-versa. It is applied in the field of drives and control. The primary objective of this laboratory is to provide practical knowledge of static and dynamic Electrical Machines to the students. This lab provides knowledge about the application and design of machines by studying the characteristics of the machines.

Utilization:  This laboratory offers support for courses as listed below

Electrical Machine Lab.-I for Electrical Engineering 4th Semester

Electrical Machine Lab.-II for Electrical Engineering 5th Semester

Experiments offered

A partial list of experiments offered by the laboratory is presented below.

Electrical Machine Lab - I B.Tech. PC-EE 491

•  Determination of the characteristics of a separately excited DC generator.

• Determination of the characteristics of a DC motor

• Study of methods of speed control of DC motor

• Determination of the characteristics of a compound DC generator (short shunt)

• Determination of speed of DC series motor as a function of load torque.

• Polarity test on a single-phase transformer

• Determination of equivalent circuit of a single phase transformer and efficiency.

• Study of different connections of a three-phase transformer.

• Study of Parallel operation of a single-phase transformer.

• Determination of temperature rise and efficiency of the transformer (Back to back test) .

Electrical Machine Lab-II BTech. PC-EE 591

•  Different methods of starting of a 3 phase Cage Induction Motor & their Comparison [DOL, Autotransformer & Star-Delta]

•  Speed control of 3 phase squirrel cage induction motor by different methods & their comparison [voltage control & frequency control].

•  Speed control of 3 phase slip ring Induction motor by rotor resistance control.

•  Determination of regulation of Synchronous machine by

  • • Potier reactance method.

    • Synchronous reactance method.

•  Determination of equivalent circuit parameters of a single-phase Induction motor.

•  Load test on single-phase Induction motor to obtain the performance characteristics.

•  To determine the Direct axis resistance [Xd] & Quadrature reactance [Xq] of a 3-phase synchronous machine by slip test.

•  Load test on wound rotor Induction motor to obtain the performance characteristics.

•  To make connection diagram to full pitch & fractional slot winding of 18 slot squirrel cage Induction motor for 6 poles & 4 pole operation.

•  To study the performance of the Induction generator.

•  Study the effect of variation of field current upon the stator current and power factor of the synchronous motor at various loads and draw v-curves.