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A compressor is a mechanical device that takes in a medium and compresses it to a smaller volume. Compressors can increase or decrease a given mass to a lower or higher pressure. V&T EcoDriveCN® AC variable speed drives are typically connected to pumps to compress the air.

There are several kinds of compressors, such as centrifugal, rotary screw, single-screw, and twin-screw compressors. Thus frequency inverter (AC VSD drive) requirements are different for the different types of compressors.

Air compressors offer a tremendous opportunity for energy saving. For example, a rotary screw compressor in a manufacturing plant was using a large amount of energy, as its capacity exceeded the required output of compressed air during long periods of time. If the capacity fits the required compressed air, a lot of power consumption is reduced.

V&T Technologies Co., Ltd. is recognized as the leader for energy saving retrofits of compressors, has rich experiences with air compressors in many industries, such as mining industry, machine tools, textile industry, gas and oil.

Some clients include: Atlas Copco, Ingersoll Rand, Sullair, Kai Shan.

Benefits to the customer with V&T EcoDriveCN® drives include:
Energy savings of 20% ~ 60% (Payback in less than a year)
Less wear and tear on compressor components through soft, controlled starts and elimination of cycling
Lower peak demand for electric power because of soft start
Noticeably quieter operation
More reliable operation through power anomalies, power frequency/variable frequency switching

• application of AC variable speed drives (frequency inverters) in air compressor industry


• solution of AC frequency inverters (VSD drives) on air compressors for energy saving


• photos of application of air compressors, screw compressors


• energy saving ratio of air compressors with AC frequency inverters (variable speed drives)