Brushless Exciter Used For Giving Controlled DC

The synchronous generator has a brushless exciter for giving the necessary excitation for a controlled DC. These excitations are actually fed to the field winding which will forcibly be excited. The generator starts operating and will give more power that the generators output power. The negative DC will be produced for giving fast de-excitation of the generator. This negative excitation is used when the generator is working above the base power level.  The brushless excitation system has high frequency AC generator and a rotator with rectifying bridge. These exciters are reliable as the brushes are eliminated. The maintenance naturally reduces due to the elimination of the brushes.

The brushless exciter has the diode designs which give continuous service. There are many designs which are suitable for different current voltage and shaft mounting arrangements. The exciter has the reliable power source for exciting the motor. There is no necessity of the transformers which will occupy more space. The station battery is not necessary field flashing. It will have the sustainability for short circuits. The installation is very easy as there is no much network of wires. There is a bigger circuit breaker and the discharge resistors are not at all required for this circuit which is having the brushless exciters.

The wound rotor motors has an induction motor. The windings are insulated and got out of the slip rings and brushes. The slip rings do not require power. The resistance is in series with rotor windings. These motors have high loads and torque. The acceleration time is more and thus suitable for the high inertia loads. The torque and the speed can be controlled in the wound rotor motor. The motor can be controlled manually or automatically. These motors have the brushes and the slip rings. The winding of the wound rotor motor is not shorted. The end of the slip rings has one end of the phase.

The brushes are mounted on the slip ring. This makes another circuit where the resistance can be added. This insertion of the resistance will help the wound rotor motor to perform in a unique way. The motor starting torque will depend on the resistance inserted. The motor is reliable for any amount of loads put to it. The curves which are drawn by changing the resistances can be seen to support the wound rotor motor. A small resistance added also will start the motor.


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