☑ Field Discharge Resistor Generator

The results of these investigations show that the use of such field discharge resistors reduces the turbine generator torsional torques after the fault clearance. During a discharge event the coil acts as a current source which discharges with time into the load.

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Opening the discharge resistor circuit and closing the main field circuit.

Field discharge resistor generator. When the ac generators circuit breaker suddenly opens there is a risk of damage due to overvoltage. Consisting of either a resistor or a varistor such as a metrosil. The voltage regulator simply cant take care of things fast enough.

When the field breaker is open the field discharge resistor is connected across the field winding so as to dissipate the stored energy in the field winding which is highly inductive. Generator a rectifier package the field discharge resistor. The possibility of reducing the torsional torques of turbine generator shafts during disturbances by interrupting the generator excitation and switching in a field discharge resistor during the fault duration is discussed.

An exciter in a synchronous generator is used. Many big generators still have a field discharge resistor. Switches the field discharge resistor into circuit just before the main field breaker contacts open.

Brushless motors have the armature of an ac. So the field circuit breaker is tripped cutting the excitation off. The field discharge resistor when the stator winding is first energized the rotating magnetic field cuts through the rotor winding at a fast rate of speed.

It is composed of a stack of dis similiar material washers with a bolt holding the stack together. Excitation fails whilst a generator is on load the magnetic coupling between the rotor and stator will be lost. The generator will no longer produce an electrical output.

It has as brushless exciter with a stator contain three rectifiers and a what appears to be a field discharge resistor wired directly into the field wires and grounded to the stator. This causes a large amount of voltage to be induced into the winding of the rotor. These units often use a rotary dc generator exciter.

Field discharge resistors get latest price a voltage regulator for controlling over voltage conditions in an electrical generator by rapidly discharging the generator field winding current into a discharge resistor upon the detection of the over voltage. I took the resistor apart at first thinking it was a rectifier. The main and the pilot exciters can be driven either by the main shaft or separately driven by the motor.

The control may be electro mechanical or solid state and includes protection against loss of field and incomplete starting sequence. Maximum discharge current from the field coil.