NZ3000 series VFD of the high-efficient permanent-magnet motor.
The NZ3000 series drives can adjusting the rotary speed according to
the needed quantity of air and it can save more energy compared to the
machine without the inverter to control its rotary speed. Besides,
comparing with the general-used machine with an inverter, equipped with
high-efficient permanent-magnet motor can save the 6%~7% of the energy,
especially in the area of low loading, its outstanding control range and
structure can show obvious advantage in energy-conservation. Compared
with the common power frequency air compressor, magnetic variable
frequency air compressor which can play the highest energy efficiency in
a wide range will save the energy of 42%.
Features and advantages
1. Have a stable operation
It does not have the mechanical loss caused by leather belt and gear
wheel. It has a compact structure. Neodymium boron permanent magnet of
high-efficiency is used in the permanent-magnet machine, it will not
lose its magnetism even under 120℃ and has a longer time of usage.
Corona resistant enamel covered wire specialized for inverter is used in
the stato coils, thus having a better capability of insulation and a
longer time of usage.
2. Controlling system of colorful touching screen
The controlling system is dynamic and fully intelligent, it can
dynamically show the working situation of every parts in the compressor
and can show the working curve of voltage and temperature in the
real-time and intuitive way. It has a super big internal storage of 8M
Flash ROM+16M SDRAM and can store thousands of historical failures. The
standard screen has TFT of seven inches. It have passed the CE
certification and accord with the FCC Class A. It can achieve the
intelligent control, speed changing control, automobile adjusting of the
air quantity, loading start-up, elimination of current surge and
lengthen the using time of composing parts, thus improving the
reliability of the system greatly.
3. Energy-saving and stable
High-efficient permanent-magnet motor is more energy-saving compared
with the common frequency-changed host machine, especially under the
condition of low rotary speed, the former one can still keep a high
motor efficiency. The responding speed of synchronous motor is quite
quick, it performs well in the exhaust response and can realize the
soft-start.The current of motor will not exceed the current of full
loading during operation and at the same time, it can reduce the pound
to the power grid equipment and will not cause the damage to the
electrical appliances.
4. Small size
The size of the motor is small. The size of common frequency-changed
motor is three times bigger than it so the dismounting and mounting
would be very convenient.
5. Inverter control of the cooling fan (optional)
The cooling fan is controlled by the inverter so that 50% of the
energy can be saved. The revolution of the fan is controlled according
to the exhaust temperature, thus saving the electricity. At the same
time, the durability is enhanced due to the temperature of the system
and whole parts have been stabilized. Besides, the noise can be further
decreased after the inverter have been used in the fan.
6. Avoiding the loss on unnecessary power
The pressure sensor can sense the pressure at the exhaust port and then
send the signal to the PLC, the PLC can control the output frequency
according to the value of pressure comes from the pressure sensor. The
frequency can be decreased when the voltage is big and the frequency can
be increased when the voltage is small, so that the pressure can be
always stable. The compressor can control the rotary speed of the
permanent-magnet motor by inverter, thus composing a frequency-changed
and loop-closed controlling system. Achieving the stable voltage in air
supply, using more then producing more,using less then producing less,
no using then stop and when using, then soft-start to produce the air.
Avoiding the loss on unnecessary power totally.
7. A wider range of working frequency and low noise
The frequency changes from 25% to 100%. The bigger fluctuation in the
system gas consumption, the more obvious of the effects in
energy-saving. Besides, the operating noise is small so that it can be
used in any situations.
8. Decreasing the times of repair
It has equipped with the newest screw rotor which can be
semi-permanently used. It will not need a big scale of repair until 10
years later considering the best so that the customers’ needs on long
period of maintenance can be achieved. It has the oil quality of
high-efficiency and longevity and do not have the structure of suction
adjusting valve.
Typical cases
