Retrofitting a motor mounted VFD
If the pump and motor are not in a hazardous area and the saving of life cycle costs and/or other hydraulic benefits supports the installation of a VFD, in some cases the use of a motor-mounted frequency converter may be the cheapest and easiest way to equip an already installed pump with this technology .
For motor sizes from 1.1 up to 22 kW (1.5-30 hp) motor-mounted VFDs are available which can be mounted on standard three phase AC-Motors without any machining on the motor casing.
They are cooled by the motor fan and are enclosed to IP54/ NEMA 12 and directly wired to the motor terminal box. An example is shown in Figure 10.3.
Related posts:
System selection considerations:Pipeline conveying capacity.
SAFETY VALVES:COOLERS
BASIC DIAGRAMS AND SYSTEMS:FLUID POWER SYSTEMS
Low pressure and vacuum:Screw feeders and The simple screw feeder.
Introduction to pneumatic conveying and the guide:Industries and materials and Mode of conveying
Material property influences:Dense phase plug flow
Material property influences:Dense phase sliding bed flow
RESERVOIRS, STRAINERS, FILTERS, AND ACCUMULATORS:fiLTRATION
Hydraulic pumps:Piston pump
Pneumatic piping, hoses and connections.
Servo valves.
Air Compressors, Air Treatment and Pressure Regulation:service units
Safety, Fault-Finding and Maintenance:safety
ENTROPY:ISENTROPIC EFFICIENCIES OF STEADY-FLOW DEVICES
DIESEL CYCLE: THE IDEAL CYCLE FOR COMPRESSION-IGNITION ENGINES