Field Discharge Resistor For Synchronous Motor. It s 100 years old so manufacturers data is non existant. Generator serves as the exciter and its field winding is stationary and requires no slip rings or brushes.
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It s very important that the dc field always have either dc power applied to it or the discharge resistor connected across it. Does anyone know of a good resource for sizing a field discharge resistor for a 1000hp 2 2kv 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.
The discharge resistor is shunted across the motor field during starting.
Although the synchronous motor starts as an induction motor it does not operate as one. Generator a rectifier package the field discharge resistor and a solid state sensing and switching package mounted on the rotor of the synchronous motor. The synchronous motor control. A destructively high voltage will develop instantly if the dc field is open.
