150HP~350HP Oil-flooded PM VSD energy saving in air compressor

150HP~350HP Oil-flooded PM VSD energy saving in air compressor

Pressure (Mpa): 0.7/0.8/1.0/1.2
Air flow (m³/min): 20.1-40.8
Power: 150hp-350hp(110kw-250kw)
Model: Permanent Magnet Variable Speed Driving
Delievery time: 7 days.
Payment: T/T, L/C.

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150hp-350hp Permanent Magnet energy saving in air compressor

What is Rare-earth permanent magnet motor?

energy saving in air compressor

Rare-earth permanent magnet motor is a new type of permanent magnet energy saving in air compressor motor.

Due to the high magnetic energy product and high coercive force of a rare-earth permanent magnet (especially high intrinsic coercivity), it can be built up after magnetization without additional energy. Contact us to get energy saving in air compressor price list.

The strong permanent magnetic field, which is used to replace the electric excitation field of the traditional motor, is not only efficient, but also simple in structure, reliable in operation, and small in size and light in weight. Email:info@fntcompressor.com

 It can achieve high performance (such as special high efficiency, high speed, and high response speed) that can not be compared with traditional electric excitation motors and can be made into special motors that can meet specific operational requirements.

What is the difference between the PM motor and ordinary motor?

1. Magnetic properties. After the permanent magnet motor is made, the magnetic field can be maintained without external energy; the ordinary motor needs current to pass through to form the magnetic field. Email us info@fntcompressor.com to know more infomation about energy saving in air compressor.

2. Rotor structure. A permanent magnet magnetic pole is mounted on the rotor of the permanent magnet motor; an exciting coil is mounted on the rotor of the ordinary motor.

What is the advantage of the PM energy saving in air compressor motor?


  1. Permanent magnet(PM) motor adopts high-performance NdFeB permanent magnet and does not lose magnetism at 120 °C. The service life is more than 15 years.
  2. The stator coil adopts the special anti-corona enameled wire for the inverter, which has excellent insulation performance and long service life.
  3. The motor has no bearing structure, transmission efficiency 100%.
  4. Free maintenance, avoid regular replacement of bearings.
  5. The motor has a temperature protection function (PTC / PT100). Email:info@fntcompressor.com
  6. The motor has a wide range of speed regulation, high precision, and a wider range of gas volume adjustment.
  7. The motor runs smoothly, with low noise and low vibration.

What is VSD/VFD(Variable Speed/Frequency dring) technology to energy saving in air compressor?

frequency converter.png

Speed(Frequency) variability is to change the power supply frequency, thus adjusting the load, to reduce power consumption, reduce losses, and extend the life of the equipment.

The core of the Speed(Frequency) variability technology is the frequency converter.

Through the variability of the power supply frequency, the automatic speed regulation of the motor is realized, and the frequency of the fixed grid of 50 Hz is changed to the frequency of change of 30-130 Hz. At the same time, the power supply voltage adapts to the range of 142-270V, which solves the problem that the electrical equipment voltage is unstable due to the instability of the grid voltage. Email:info@fntcompressor.com

The technology for realizing AC power control by changing the AC frequency is called Speed(Frequency) variability technology.




What are the advantages of VSD(VFD) energy saving in air compressor technology?

1. Power saving:

VSD power saving.jpg

Power saving is the biggest advantage of the VSD energy saving in air compressor. Especially when the user’s airflow fluctuation range is large, the power saving advantage of the frequency conversion air compressor is more obvious.

Air compressor power consumption costs account for more than 60% of its cycle operating costs, and the cost of producing compressed air accounts for more than 40% of the plant’s total electricity bill. The air demand in most production environments fluctuates 40%-80% at different times of the day, on different days of the week, or in different months of the year. The compressed air provided by the variable frequency air compressor can accurately meet the user’s air demand. When the user’s air consumption is reduced, the airflow is reduced and the power consumption is reduced.

Key features of VSD: By reducing the power consumption of unloading, the power consumption of the air compressor is minimized.

2. Less impact on the Power Gridkingbull vsd air compressor.jpg

The motor starts and loads smoothly, and there is no impact: the motor can be precisely controlled to avoid the damage caused by current fluctuation, which is beneficial to prolong the service life of the equipment. Email:info@fntcompressor.com

How much Power can be saved by PM VSF energy saving in air compressor?

For example: 

2 sets for 30hp air compressors; 24h working one day.

Item Airflow Power consumption(24h) Power consumption(one year)
Regular Motor 6983m³ 985.4Kw 430529Kw
PM VSD model 8724m³ 781.4kw 271752Kw
Power saving 158777kw

kingbull energy saving in air compressorPower saving comparison chart(one year)

Power(kw) 22 30 37 55 75 90 110
Power saving(kw) 22669 30912 38125 56672 77282 92736 113344


Specification of PM VSD air compressor


JNY series

Cooling method                 


Pressure (Mpa) 


Air delivery (m3/min)



Power    (KW)


Speed    (rpm)


Start method


Voltage  (V/Hz)

220~460/50~60 (3 Phase)

Protection grade


Insulation grade


Driven type


Noise                (dBA)


Air-oil content      (ppm)


Outlet temperature   ()

≤Ambient temperature +15

Control type of exhaust volume

Intake accommodation control

Setting pressure of safety valve   (Mpa)

Air compressor exhaust pressure +0.1

Lubricating oil quantity  (L)


Lubricating oil brand


Weight                (KG)



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