400KW AC Variable Voltage Variable Frequency Inverter Drives for Water Pump

400KW AC Variable Voltage Variable Frequency Inverter Drives for Water Pump

A pump is a machine or device for raising, transferring, or compressing fluids. Pumps represent the largest single use of power in industry (31%) by motor driven equipment. Process variables, including pressure and flow of gases and liquids, have long been regulated using mechanical clutches, throttles, and adjustable inlet guide vanes. Pumps often operate as a variable torque load, a load that increases as the speed increases. These mechanisms waste energy, require frequent maintenance, and provide inaccurate control.

Pumps?have?two?main?categories:

1. Positive displacement pumps force a fixed volume of fluid from inlet to discharge with each stroke or rotation. (e.g., reciprocating, rotary, or screw type pumps)

2. Centrifugal pumps are the biggest class of pumps, which use the fluid\'s own momentum to build up pressure or head. Centrifugal pumps use centrifugal and hydrodynamic forces to create pressure that moves the fluid from inlet to discharge.

Pumps can also be classified by principle of operation and drive requirements.?

Application?Challenges

·?Reduce?energy?costs
Motors?use?less?energy?as?speed?is?reduced.

·?Reduce?demand?charges
Drives?reduce?motor?starting?current?8-10?times.

·?Variable?and?constant?torque?load?characteristics, ?depending?on?pump?type.

·?The?motor?may?spin?backwards?due?to?pump?backpressure?when?stopped.

·?Control?of?pressure?and?flow?is?desired.

·?High?reliability.

·?Wide?horsepower?range?for?different?pump?sizes.

·?Environmentally?friendly?(harmonic?standards).

·?Network?communications.

Prevention?of?water?hammer, ?pipe?stress, ?valve, ?and?pump?seals?and?cavitation?prevention.

Features?of?P5?series?cooling?tower?Water?Pump?application

Power?range?of?P5?VFD

Voltage:?3?phase?380VAC(323VAC?–?440VAC)

Power:?18.5kw/25HP?–?400kw/535HP

Specification?of?P5?VFD