Air compressor, used to enable breathing under adverse outside conditions
AC traction systems, prime movers, head end power equipment, and computer systems are supplied by GE, while MPI supplies the brake systems, air systems, and cooling systems.
The air brakes are driven by an engine powered compressor which also feeds the servo for the hydraulic brake circuit.
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This control scheme was popularized in industrial air compressor applications by KOBELCO,Kaeser and Gardner Denver.
The most common form of VSD technology in the air compressor industry is a variable-frequency drive, which converts the incoming AC power to DC and then back to a quasi-sinusoidal AC power using an inverter switching circuit.