Electrical Engineering ⇒ Topic : Power Developed by Synchronous Motor

POWER DEVELOPED BY SYNCHRONOUS MOTOR

The synchronous motor is connected to the infinite bus as shown in Figure (a).

Since,

                                    figure  (a)

Power developed by the motor per phase is given by

                      ............. (1)

                      ............... (2)

Neglecting armature resistance, Eq. (1) can be written as:

                                                         ................ (3)

                                                             ............... (4)

                                                            .............(5)

where Ns is synchronous speed of the motor in r.p.s.

Since,

Power at the shaft P_sh = P_m- Rotational losses

Gross torque developed by the motor is given as:

                                                                 .............(6)

                                                    ............. (7)