Consider new developments for variable-speed electric motors
New challenges, recent developments, the latest mechanical issues and main reliability factors for large variable-speed electric motor drivers in HPI plants are presented here.
The major oil, gas and petrochemical operators use
variable-speed electric motor drivers to drive process
compressor trains, as shown in Fig. 1. A large
electric synchronous motor is used for high-power applications.
Because of the total shaft-line length of these large electric
motors, dynamic issues and lateral vibrations are difficult
problems. Resonance must be eliminated, and the lateral and
dynamic exciting forces generated by the electric motor should
also be minimized.
Fig. 1. Example of a large
variable-speed electric motor.
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