Field Discharge Resistor For Synchronous Motor. At the proper slip and phase angle the resistor is removed automatically from the field circuit and dc current is applied to the field to pull the motor into synchronism. It also helps to reduce the voltage induced into the rotor by the collapsing magnetic field when the dc is disconnected from the rotor.
The key to the pulse syn system is the synchronizing module. Does anyone know of a good resource for sizing a field discharge resistor for a 1000hp 2 2kv synchronous motor. This module has two separate functions.
A brushless type synchronous motor incorporates the use of a remotely located dc power source called a pilot exciter or control power exciter.
For brushless motors the voltage is applied to the exciter after a preset programmable. The dc power source for field excitation field application logic field application discharge resistance application method and field discharge resistors are located external from the synchronous motor. It also helps to reduce the voltage induced into the rotor by the collapsing magnetic field when the dc is disconnected from the rotor. This applies excitation to the motor field and opens up the field discharge resistor loop.
