KOBELCO Screw Air Compressor
Kobelco is based in Tokyo, Japan, with manufacturing, sales and support locations worldwide. The Company operates in three main business sectors: Steel & Iron, Aluminum & Copper and Machinery. Kobelco's Compressor Division is a major business unit within the Machinery Sector.
Kobelco began manufacturing compressors in 1915 and remains Japan’s oldest compressor company. Today, theCompany operates worldwide and is a leader in compressor technology, engineering and innovation.Kobelco provides both process gas and standard air compressors.Kobelco is unique in that it provides all three major types of gas compressors: rotary screw, reciprocating and centrifugal. As a result, Kobelco has the ability to engineer the best possible compressor solution for each application. For customers, the results are optimum performance and lowest overall costs of ownership.
New KOBELION VS series equips super premium efficiency IPM motor, which efficiency is equivalent to IE4 of IEC standard. IPM has better efficiency from low load to high load compare to induction motor. This IPM is with oil cooled jacket cooling system with insulation class H, which has better resistance to high ambient conditions.
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BUILT-IN OVER HUNG DESIGN,
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Super Premium Efficiency IPM Motor (IE4 equiv)
(*) Standard of motor efficiency is defined by IEC (Electrotechnical Commission) standard and it defines IE1=Standard Efficiency, IE2=High efficiency, IE3=Premium Efficiency, and IE4=Super Premium Efficiency for induction motor. As IPM is synchronous motor, IPM is not defined in this scheme. IPM equipped on VS series has the efficiency beyond IE4 of induction motor, and has good efficiency in wide range of the working load. |
New Kobelion VS series equips super premium efficiency IPM (interior permanent magnet) motor, which efficiency is equivalent to IE4 of IEC standard. IPM has better efficiency from low load to high load compare to induction motor. This IPM is with oil cooled jacket cooling system with insulation class H, which has better resistance to high ambient conditions.
Summit of Inverter control
"Providing exact volume and pressure what user needs." It is quite simple in words, but adjusting compressor speed depends on the demand of factory load which will change from moment to moment without hunting or overshoot is quite delicate issue. New Kobelion VS series offers maximum energy saving with minimum pressure fluctuation backed by own algorithm to run inverter of Kobelco as a pioneer of inverter compressor. |
Since we applied first IPM motor on Inverter compressor in 1998, we have been accumulated know-how for nearly 20 years. Wide Range Control and Built-in Overhung Design are some of our unique technology leading inverter compressor in the world.
New Wide Range ControlIn case that required pressure of compressor is 0.5MPa, you may be able to use one size smaller compressor. Wide Range Control of Kobelion VS can deliver much higher flow when it runs at lower pressure point. Kobelion VS senses line pressure and automatically change maximum rpm limit. New Kobelion VS achieves much higher flow and much wider pressure range. As a leading company of Inverter compressor, we can offer cutting-edge value.
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KOBELCO Oil-free Compressors offer extremely high efficiency with superior specific power consumption, the energy saving index for compressors. This is just as "Eco-car" becomes popular for its low CO2 emission and low fuel consumption.
Superior capability can save more energy, and all the user can take large benefit from that as minimizing compressor life-cycle cost.
High efficient two stages compression
Two stages compression not only saves energy, but also educes discharge temperature and improves reliability. Its efficiency improves 9-34 % compared with single stage oil free screw compressor.
Efficiency comparison
New screws
New developed screw profile is designed by finite element analysis It minimizes air leakage from discharge end to suction end due to non-contact rotation, realizing high efficiency.
Thermal expansion finite analysis
Direct drive transmission
There is a gearbox between airends and motor without coupling, in order to reduce mechanical losses. ISO 5/AGMA 12 high accuracy gears have advantages of long service life, less transmission losses, low noise and low vibrations, etc.
Supreme thermosetting coating
Screws’ surfaces and inner walls of airend housing are coated by PTFE or MoS2 thermosetting coating which has super strong adhesion, anti-corrosion and high thermostability properties
Two vent holes construction (Kobelco Patent)
Two vent holes construction ensures no oil entering compression chamber through the seals even if the compressor is unloading for a long time
Minimize pressure fluctuation
To reduce pressure fluctuation, Kobelco adopted pivotal unloading valve and achieved to reduce pressure fluctuation from 0.1MPa to 0.05MP which eliminates eliminating energy consumption caused by unnecessary pressure rise.
Energy Saving Logic
It can unload the compressor in advance if unload/load cycle is longer than setting time (at least 23s). Thus eliminate energy consumption caused by unnecessary pressure rise.
Coordination of two units
2 units can be coordinated running by simply wiring them. without group controller Its own controller can set start sequence.
Standard configured wiring terminals for connection with ordinary group centrollers.
Reduce energy consumption by optimized capacity and constant pressure controls
Kobelco’s unique inverter and Energy Saving Logic control can optimize energy saving effect, no matter how the load condition of it is. They can trace the pressure changes quickly and maintain the pressure fluctuation with in 10.01MPa, and supply necessary air volume by optimized power
Energy saving by constant pressure control
Pressure fluctuation can be controlled within ±0.01MPa.
The first one to adopt Internal Permanent Magnet motor
Internal Permanent Magnet motor as a standard configuration
It has a much better efficiency than standard and premium induction motors In addition, it has a better energy saving effect by adopting high efficient inverter compared to previous inverter
Motor maintenance workload is reduced by prolonged re-grease interval because IPM motor has a low bearing temperature
Comparison between IPM and induction motors
Combined efficiency
Soft start of inverter
Reduce starting current and torque to realize steady soft startup, as well as lower electrical devices cost.
Other characteristics
High frequency reactor is a standard configuration to filter out high frequency harmonics produced by inverter (according to JEMA high frequency harmonics suppression directive).
Forced cooling on inverter prevents trip at high temperature in summer.
Coating on electronic panel can resist dirt and moisture effectively and enduringly
Regulate flow capacity by changing rotating speed
Energy saving characteristic
Energy saving sample (37AV compare with old model)
Adopt Wide Range Control
(increase flow capacity in low pressure) *only for FE37AV
Wide Range Control
Expand flow capacity range in low pressure to increase its maximum capacity as well as supply optimized solution for energy saving
-Transfer the method from retrenching to utilization Flow capacity changes under Wide Range control for FE37AV
Energy saving by adopting small models
