Kaishan PMVF permanent magnet variable frequency screw machine

13 technological advantages of Kaishan permanent magnet variable frequency screw air compressor

　　1. Development and Energy Efficiency Advantages of Kaishan Air Compressor Screw Host

Dr. Tang Yan, the general manager and expert of the company, is one of the experts in screw compressors. The T, α, and Y-shaped wires he invented are used by many companies in the United States and China. Kaishan Corporation adopts the screw host designed by Dr. Tang Yan, which enables each screw air compressor in the company to achieve national energy efficiency. The high efficiency of the screw host is the basis for the efficiency of Kaishan permanent magnet variable frequency screw air compressor compared to ordinary permanent magnet variable frequency screw air compressor.

Dr. Tang Yan's main achievements include obtaining eight US invention patents, including Tang's screw rotor profile, structural design and sealing technology for gas and refrigeration screw compressors, vortex expansion compressors, screw compressor system technology, and oil separation filters. Published 33 academic papers in international academic journals and conferences. Developed a modern screw compressor design package that can be used for all design calculations of refrigeration, gas, and air screw compressors. Hosted the design of over 300 natural gas refueling stations around the world. Developed the American Carrier Foxfire refrigeration screw compressor, which is still the world's leading refrigeration screw compressor to this day. Led the development of Quincy Alpha screw compressor rotor profiles, QSIi series, QGD series, QGL series and other air screw compressor units in the United States, all products in terms of efficiency, noise, reliability and fuel consumption.

Advantages of Kaishan permanent magnet variable frequency screw air compressor host:

① The exhaust port is designed synchronously with the system, and the optimized exhaust port does not require subdivision of medium and high-pressure ports.

② Excellent atomization effect and excellent oil and gas mixing design.

③ The unique design ensures effective release of exhaust enclosed volume.

④ High precision machining and testing processes ensure the achievement of design requirements.

　　2. One of the advantages of efficient permanent magnet synchronous motors

Kaishan permanent magnet synchronous motor has high speed, wide adjustment range and high efficiency due to the use of special rare earth permanent magnet materials.

　　3. Advantage 2 of Efficient Permanent Magnet Synchronous Motor

Kaishan's high-efficiency permanent magnet synchronous motor has high efficiency, which is reflected in its low heat generation. Therefore, Kaishan's high-efficiency permanent magnet synchronous motor adopts a fully enclosed structure design, which completely solves the problem of dust and impurities. Ordinary permanent magnet synchronous motors require emission openings in their structural design due to their low efficiency and high heat generation. This structure allows iron containing dust in the air to enter the motor, leading to coil failure over time. Therefore, Kaishan's products eliminate a huge potential fault, with better reliability, higher efficiency, longer lifespan, and low noise (Kaishan's 37KW permanent magnet variable frequency screw air compressor has a running noise as low as 65 decibels).

　　4. The third advantage of efficient permanent magnet synchronous motor

Kaishan permanent magnet synchronous motor has a heat resistance temperature of up to 180 ℃, which is 50% higher than the 120 ℃ of similar domestic products, ensuring that it will not lose magnetism under any circumstances.

　　5. Advantage 4 of Efficient Permanent Magnet Synchronous Motor

Kaishan permanent magnet synchronous motor rotor has achieved rare earth permanent magnetization, so there is no slip, no electrical excitation, and no fundamental iron and copper losses in the rotor. The electric motor does not need to draw excitation current from the power grid, and the power factor is close to 1. It has high speed regulation accuracy, with a speed regulation error of 1/30000, greatly reducing the fluctuation of compressor discharge pressure.

　　6. One of the advantages of permanent magnet frequency conversion control technology

Expert in permanent magnet frequency conversion control, joined Kaishan Group in 2014. I have been engaged in equipment technology research and development for nearly 30 years, and have worked in Australia, Canada, and the United States, serving as an engineer, Vice President of Research and Development, and other positions. Invented a high-speed non-contact high-efficiency centrifugal compressor and developed a commercial magnetic levitation permanent magnet synchronous motor to drive a 40000 rpm centrifugal compressor, which is used as a core component of aerospace equipment.

The control technology of Kaishan permanent magnet variable frequency screw air compressor was jointly developed by a Swiss company. The design includes weak magnetic control, pressure control, and simple and stable open-loop control of permanent magnet motor, which can adapt to various harsh working conditions and ensure system stability.

　　7. Advantage 2 of Permanent Magnet Variable Frequency Control Technology

No rotor angle position sensor is required, which simplifies the system and improves its stability. Torque can be compensated at any angle within 360 degrees to achieve torque control. The utilization rate of bus voltage is greater than 93%, far exceeding ordinary frequency converters on the market.

　　8. Advantage Three of Permanent Magnet Variable Frequency Control Technology

Highly integrated control. By integrating the frequency converter and screw air compressor control system, advanced PID control algorithm is adopted to accelerate control speed, improve control accuracy, and provide customers with more stable gas supply pressure.

　　9. One of the other technological advantages of Kaishan permanent magnet variable frequency screw air compressor

The frequency regulation range of ordinary permanent magnet variable frequency screw air compressor ranges from 25% to 100%. The variable frequency adjustment range of Kaishan permanent magnet variable frequency screw air compressor ranges from 15% to 100%; Realize a wide range of gas supply pressure (6.2-10Bar), which can meet the different pressure needs of users.

　　10. The second technical advantage of Kaishan permanent magnet variable frequency screw air compressor

Kaishan permanent magnet variable frequency screw air compressor, with a speed higher than existing permanent magnet variable frequency air compressor products in China, will not experience oil spraying during low-speed operation, greatly improving reliability.

　　11. The third technical advantage of Kaishan permanent magnet variable frequency screw air compressor

Kaishan permanent magnet variable frequency screw air compressor has a speed higher than existing permanent magnet variable frequency air compressor products in China. Compared with low-speed permanent magnet variable frequency screw air compressors, it has a smaller volume and lighter weight. Moreover, during low-speed operation, the rotor tooth tip speed remains within the optimal tooth tip speed range, thereby maintaining high volumetric efficiency and adiabatic efficiency, resulting in high efficiency.

　　12. The fourth technical advantage of Kaishan permanent magnet variable frequency screw air compressor

Kaishan permanent magnet variable frequency air compressor is a domestic screw compressor that realizes the synchronous design of screw host, synchronous motor, permanent magnet control and electrical control, and achieves perfect coordination.

　　13. The fifth technical advantage of Kaishan permanent magnet variable frequency screw air compressor

Temperature control valve: All units are equipped with temperature control valves, with a target temperature of 87 ℃. After the unit is started, the fan will continue to run to ensure the cooling of the motor and frequency converter.

Cold and hot separation: The interior of the unit is separated by partitions.

Normal temperature zone, with the same temperature as the ambient temperature;

Medium temperature zone, with a temperature of around 3-5 degrees Celsius above ambient temperature;

High temperature zone, with a temperature of around 15 degrees Celsius above the ambient temperature;

Temperature sensitive motors, frequency converters, and air filters are all in the room temperature range to ensure normal operation of the unit and lower input specific power.

　　Explanation of Comprehensive Energy Efficiency Ratio

In the air conditioning industry, there is a new energy efficiency index called comprehensive energy efficiency for permanent magnet frequency conversion. Its calculation method is: load 100% accounts for 2.3%, load 75% accounts for 41.5%, load 50% accounts for 46.1%, and load 25% accounts for 10.1%. With the continuous development of China's energy-saving industry, it is believed that the comprehensive energy efficiency evaluation standards will also be applied to the air compressor industry. By comparing the comprehensive energy efficiency data of permanent magnet variable frequency screw air compressors with the energy efficiency data of ordinary screw air compressors, we can clearly see the huge energy-saving advantages of permanent magnet variable frequency screw air compressors.

Kaishan permanent magnet variable frequency screw air compressor is a screw compressor that realizes synchronous design of screw host, synchronous motor, permanent magnet control and electrical control, and is matched.