Retrofit any make and model of fixed speed air compressor
with variable speed/frequency drive cabinet complete with VSD-R PID controller.
The variable speed/frequency drive is located adjacent to
the air compressor/drive motor. The VSD-R “PID‟ controller is housed in a
separate wall mounted enclosure
The VSD-R controller & variable speed/frequency drive
will control the speed of an air compressor’s main motor in response to
pressure variations (demand).
The VSD-R controller, variable speed/frequency drive and
air compressor combination can function as a “stand-alone‟ variable speed drive
air compressor “unit‟ or operate in conjunction with the system control
The VSD-R controller performs all pressure regulation
functions (including internal ΔP) and controls the air compressor using
load/unload commands. This is achieved by integration of the compressor unit’s
pressure switch with an “i-PCB‟ or using the compressor controller’s remote
load/unload input. The air compressor control system will respond in an
identical manner as if the VSD-R controller was a remote regulation/system
In addition to drive output current, voltage &
frequency, the VSD-R controller monitors the temperature of the motor casing or
motor cooling air outlet during operation and limits minimum speed for enhanced
Contact Airnergy for technical specifications and VSD
packages sizing and costs.
Fixed Speed Compressor Retrofit VSD