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What Are AC/DC Drives?

AC and DC are different types of voltage or current used for the conduction and transmission of electrical energy.

AC stands for alternating current. AC Drives are frequency converters designed to control the speed and torque of an electric motor. The speed is controlled by changing the frequency of the electrical supply to the motor.

The types of motors that ac drives control normally operate at constant speed. Enabling the user to control the speed of motor potentially gives the user benefits in terms of process control and energy savings.

DC stands for direct current. DC motor drives are a type of amplifier or power modulator that integrate between the controller and a DC motor.

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Best Practices for Compressor Storage

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Understanding best practices for compressor storage for a lubricated trim compressor with load/unload controls is critical for optimized performance.

Air receivers store compressed air and are used to temporarily satisfy fluctuations in plant air demand. There are other benefits of a wet receiver such as cooling  and cleaning the air before it enters the air treatment equipment. Storage benefits highlighted below apply to all compressor control types:
 
                                                           Figure 1
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