Automatic damping and transient supressing improvement in synchr

Details Automatic damping and transient supressing improvement in synchr Automatic damping and transient supressing improvement in synchr

1996-02-28

1997-11-04

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 75R, 310100, 310 68A, 310 67R, 310116, 464 23, 464160, H02K 4900, H02K 5100

Patent

active

056843488

ABSTRACT:
A synchronous motor/generator is modified by mounting the conventional rotor on a sleeve that rotates freely on the main shaft rather than being fixedly mounted on the shaft. Limits to this rotation are incorporated in the design such that the maximum angular rotation of the rotor on the shaft equals half the stator advance that occurs during a complete full cycle of the AC stator winding voltage. In addition to smoothing transients, this configuration permits the machine to smoothly drop into the correct stator/rotor flux phase when it changes from a motor to a generator, and back into the correct phase for a motor, when the AC power is interrupted, and subsequently resumes, resulting in dropping a single cycle.

REFERENCES:
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