In the synchronous motor rotor, copper losses are met by
In the synchronous motor rotor, copper losses are met by DC source.
In a synchronous motor, the rotor is excited by a DC source, typically supplied by a separate DC excitation system.
This DC source provides the necessary current to produce the magnetic field on the rotor and maintain synchronous operation.
The copper losses in the rotor, which include both the resistance losses in the rotor winding and the eddy current losses in the rotor core, are typically small compared to the mechanical losses in the motor.
Therefore, the DC source is primarily used to supply the field current to the rotor, rather than to directly compensate for the copper losses.
However, in some cases, the copper losses in the rotor can become significant, particularly at high rotor currents or high speeds.
Under these conditions, the DC source may need to supply additional current to compensate for the copper losses and maintain the required magnetic field strength.
In general, the DC source for a synchronous motor is designed to supply enough current to maintain the required magnetic field strength and compensate for any copper losses that may occur.
The specific design of the DC source depends on various factors, such as the size and rating of the motor, the operating conditions, and the type of DC excitation system used.