VSD Technology: Save energy with variable speed

What is VSD?

VSD (Variable Speed Drive) is a technology that allows the compressor motor to vary its speed based on the actual air demand. Instead of running at full speed and unloading, a VSD compressor continuously adjusts its output.

Energy savings

Energy costs typically account for 70–80% of a compressor's total cost of ownership over its lifetime. A VSD compressor can reduce energy consumption by 20–35% compared to a fixed-speed model, especially when air demand varies.

Globe Energy's PM VSD compressors from Denair combine a permanent magnet motor with variable speed for class-leading energy efficiency.

When does VSD pay off?

VSDs are most cost-effective when air demand varies significantly throughout the day or week. If your operation has a relatively constant air demand, a properly sized fixed-speed compressor may be sufficient.