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Synchronous Motor Control

There are very few differences between large Synchronous Generators and Synchronous Motors. The Synchronous Motor is tougher in that it can be connnected to the power line at zero speed and accelerated to full power without damage. While at speed and synchronized, both machines behave identically with respect to the voltage support while producing or consuming VARS. The DC exciters applied to each are the same; however, additional sensing, control and protection are required by the fact that the Synchronous Motor is accelerating to full speed while the Synchronous Generator is already at full speed when the voltage regulator is energized. Typically, the Synchronous Motor Exciter is configured to operate in the constant VAR control mode while the Synchronous Generators exciters are configured to operate in the constant voltage mode.

Our engineers understand the specific requirements associated with Synchronous Motor Control and will develop a complete Synchronous Motor Controller System that includes equipment required to safely accelerate the motor and apply the DC voltage to the rotating field at the correct time to insure rapid synchronization while protecting the motor from overload, jam, pull out and off-frequency conditions.

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