Permanent Magnet Variable Frequency Rotary-screw Air Compressor for Laser Cutting Machine

Parameters

Model 1.6 Bar	Volume Flow	Power	Noise	Outlet Pipe Diameter	Overall Dimension mm			Weight
	m³/min	KW	dB		L	W	H	KG
JF-20HP-1.6	1.2	15	68	G3/4	1774	749	1720	430
JF-30HP-1.6	1.8	22	68	G3/4	1774	749	1950	468
JF-50HP-1.6	2.3	37	68	G3/4	1774	749	2150	658

Energy saving examples

31% POWER OFF

An example of energy saving of permanent magnet synchronous inverter(PSMI) on rotary-screw air compressor: The average gas output of a 37KW ordinary screw air compressor is only 75% of the rated exhaust volume.

Note:The model purchased by the user can produce 6 cubic meters of gas,but the actual average gas consumption is only 75% ,that is about 4.5 cubic meters.If it runs 6,000 hours a year,and the electricity fee is counted by kW·h.

The calculation is as follows:The ordinary machine will produce three losses:

1.No-load loss, 2.Pressure difference loss. 3.Motor efficiency loss.

It is well known that the 37-kilowatt ordinary screw compressor has an inherent service factor of 1.2. 37 kilowatts actually refers to the output shaft power (actual load power),and the unit input power should be about 45 kilowatts!

No-load loss energy saving formula:

No-load loss = 25% unloading time x no-load current loss ( 45%)

No-load loss = 0.25x (0.45x45x6000)= 30375kW·h/year

Pressure difference loss energy saving formula:

Pressure difference loss = 75% loading time x 2 bar pressure difference loss ( 14%)

Pressure difference loss = 0.75x (0.14x 45x 6000)=28350kW·h/year

Motor efficiency loss formula: 37KW permanent magnet motor efficiency is about 5% greater than the efficiency of ordinary induction motors.

Motor efficiency loss = 45x 6000x 0.05= 13500kW·h/year

Total electricity savings = 30375 + 28350 + 13500 = 72225 kW·h/year

The power consumption of an ordinary compressor = 75% (loading time)x 45x 6000 = 202500kW·h/year + 25% (idle time)x 0.45x 45x 6000=30375kW·h/year)=232875kW·h/year

Power saving rate = 72225 / 232875≈ 31%

 Conclusion: After using PSMI, the electricity bill Is effectively reduced by 31%!