The advantages of the PMVF series permanent magnet variable frequency screw machine and Kaishan permanent magnet screw air compressor host are: 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 Better atomization effect and better 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. One of the advantages of high-efficiency permanent magnet synchronous motors is that Kaishan permanent magnet synchronous motors use special rare earth permanent magnet materials, which have higher speed, wider adjustment range, and higher efficiency. The second advantage of high-efficiency permanent magnet synchronous motor is the efficiency of Kaishan permanent magnet synchronous motor

Advantages of Kaishan permanent magnet 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 Better atomization effect and better 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.

One of the advantages of efficient permanent magnet synchronous motors

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

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 lower noise (Kaishan's 37KW permanent magnet variable frequency screw air compressor has a running noise as low as 65 decibels).

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.

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.

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 perfect torque control. The utilization rate of bus voltage is greater than 93%, far exceeding ordinary frequency converters on the market.

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.

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 is from 15% to 100%, with a wider adjustment range; Realize a wider range of gas supply pressure (6.2-10Bar) to meet the different pressure needs of users.

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

Kaishan permanent magnet variable frequency screw air compressor has a speed twice that of existing permanent magnet variable frequency air compressor products in China, ensuring that there will be no oil spraying during low-speed operation and greatly improving reliability.

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

Kaishan permanent magnet variable frequency screw air compressor has a speed twice that of 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, it ensures that the rotor tooth tip speed remains within the optimal tooth tip speed range, thereby maintaining high volumetric efficiency and adiabatic efficiency, resulting in higher efficiency.

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 industry that achieves synchronous design of screw host, synchronous motor, permanent magnet control and electrical control, and achieves perfect coordination.

pioneerThe fifth technical advantage of 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.

pioneerComparison and difference between permanent magnet variable frequency screw air compressor and various types of air compressors

1. The difference between Kaishan permanent magnet variable frequency air compressor and ordinary power frequency screw air compressor

No matter how energy-efficient the power frequency screw air compressor is, once it deviates from the rated operating conditions, its efficiency will decrease to varying degrees, and energy-saving air compressors will also become non energy-efficient. Kaishan permanent magnet frequency conversion technology can adjust the motor speed according to changes in gas consumption, thereby adjusting the exhaust volume, so that the air compressor can maintain high efficiency in any gas consumption situation. Therefore, compared with ordinary power frequency screw air compressors, permanent magnet variable frequency screw air compressors have significant energy-saving advantages when the system's air consumption fluctuates, and the greater the fluctuation, the more obvious the energy-saving effect, with a comprehensive energy saving of up to 50%.

① Compact structure, small size, and very low noise (without cooling fan structure)

② High efficiency: Using rare earth permanent magnet materials, the magnetic field strength is high. The rotor of the permanent magnet synchronous motor is a permanent magnet, which does not require excitation, thus reducing the losses of stator current and stator resistance.

③ High starting torque, low current, wide speed regulation range, high speed regulation accuracy, with a speed regulation error of 1/30000. Permanent magnet synchronous motors have low inertia, constant torque, and fast response speed.

④ Significant energy-saving effect: The rotor has achieved rare earth permanent magnetization, so there is no slip, no electrical excitation, and no fundamental iron or copper loss in the rotor. Its efficiency is improved by 5-12% compared to asynchronous motors of the same capacity.

⑤ Strong adaptability: The fully enclosed structure eliminates the intrusion of dust and impurities and can be used in various harsh working conditions, even long-term low-speed operation, frequent start-up and other occasions

⑥ There is no rotor loss or heat generation, and the motor temperature rise is small. Ensure no demagnetization at 180 ℃.

⑦ Maintenance free: The structure does not require the use of bearings, thus eliminating the fault points of motor bearings and achieving maintenance free operation of the motor.

2. The difference between Kaishan permanent magnet variable frequency screw air compressor and external variable frequency screw air compressor

Ordinary screw air compressors can adjust the motor speed by installing an external frequency converter, thereby adjusting the exhaust volume to match the gas production and consumption, achieving energy-saving effects. However, the motors used in ordinary screw air compressors have rated speed, rated power, and rated efficiency, and external frequency converters force the air compressor to deviate from the rated speed. Once a regular motor deviates from its rated speed, its efficiency will significantly decrease, and the more deviation there is, the greater the decrease in efficiency. The permanent magnet variable frequency screw air compressor using a permanent magnet variable frequency motor can maintain high motor efficiency at any speed, thus the energy-saving effect is much better than that of ordinary screw air compressors with external variable frequency drives.

In addition, the adjustment range of ordinary screw air compressors with external frequency converters is 40-100%, which means that when the deviation from the working condition is more than 60%, the external frequency converter will not be able to adjust the motor speed. However, the adjustment range of Kaishan Permanent Magnet Variable Frequency Screw Air Compressor is 15-100%, which means that Kaishan Permanent Magnet Variable Frequency Screw Air Compressor can still work normally when the deviation from the working condition is 85%.

① Efficient and energy-saving from low speed to high speed, from low pressure (6.2 bar) to high pressure (10 bar) under all operating conditions.

Calculation conditions: 37kW, average load of 60%, running time of 6000 hours

② Meet various pressure requirements of customers, covering a wide pressure range of 6.2-10 bar.

③ Perfectly matching customer gas consumption, screw machine has a wider range of gas production adjustment.

④ When the customer reduces the air pressure, it can achieve more gas production, which is a function that screw compressors on the market do not have.

⑤ The integration of the frequency converter and the original screw compressor controller has accelerated the control speed and improved the control accuracy.

3. The technical advantages of Kaishan permanent magnet variable frequency screw air compressor compared to ordinary permanent magnet variable frequency screw air compressor

A high-efficiency permanent magnet variable frequency screw air compressor needs to achieve better performance in the following three aspects:

① It is necessary to have a high-efficiency screw host;

② It is necessary to have high-efficiency permanent magnet synchronous motors;

③ It is necessary to have reliable permanent magnet frequency conversion control technology.

Comparison:

① Smaller volume, lighter weight, and lower noise.

② The motor and screw host are coaxial, resulting in higher efficiency.

③ In the screw compressor industry, we are a manufacturer that achieves synchronous design of screw hosts, synchronous motors, and permanent magnet control electronic control, and perfectly cooperates with them. Tailored permanent magnet motors and inverters based on the required torque and speed of the screw to achieve better energy transmission matching.

④ The patented design of weak magnetic control, pressure control, and simple and stable open-loop control of permanent magnet motors can adapt to various harsh working conditions, making the system more stable.

⑤ The speed range is wider (15% -100%), the adjustment accuracy is higher, and the gas supply pressure range is wider.

⑥ We are developing a comprehensive online diagnostic function for screw compressors.

Kaishan permanent magnet variable frequency screw air compressor has obvious technical advantages in these three aspects.

① Heat resistance: Kaishan's permanent magnet has a heat resistance temperature of 180 degrees, which is 50% higher than the 120 degrees of similar products in China. Ensure that there will be no demagnetization under any circumstances.

② Design superiority: Due to the extremely high efficiency of Kaishan's permanent magnet motor, the motor itself generates very little heat, and a fully enclosed permanent magnet motor design can be adopted to completely solve the problem of dust and impurities. Compared to the perforated design of other manufacturers' permanent magnet motors, it eliminates a significant potential fault hazard.

③ The control system is simple and reliable: it adopts open-loop control to reduce the number of faulty links. Compared with some manufacturers who require closed-loop controllers, the stability is greatly improved.

④ Material: Kaishan permanent magnet synchronous motor adopts special permanent magnet materials, which have higher speed, wider adjustment range and higher efficiency.

⑤ More efficient: Comparison table of efficiency between Kaishan high-speed permanent magnet motor and various motors

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.

Product Model	Exhaust pressure (Mpa)	displacement (m3/min)	Motor power (KW)	Exhaust interface	Noise dB (A)	Weight (KG)	Dimensions (MM)
PMVFQ15	0.6-0.9	2.37-2.88	15	G1	68	380	1200x830x1240
PMVFQ22	0.6-0.9	3.61-4.22	22	G1	68	480	1200x830x1290
PMVFQ37	0.6-0.9	6.28-7.42	37	G1 1/2	69	710	1400x1000x1540
PMVFQ45	0.6-0.9	7.73-9.27	45	G1 1/2	70	990	1500x1160x1700
PMVFQ55	0.6-0.9	9.99-11.95	55	G1	68	550	1650×900×1110