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How does a frequency converter achieve energy-saving operation of an air compressor?

View : 3802Date : 2021-04-20 12:00

The current domestic air compressor market primarily demands energy-saving, environmental protection, and cost reduction, with newly developed products being well-received. However, economically speaking, these new models cannot completely replace the large-scale, high-capacity conventional screw air compressors already in use. Therefore, adopting variable frequency technology for energy-saving modifications of compressors is becoming more common. Thus, having a good understanding and mastery of air compressor inverters is very necessary. Let's explore this topic together with Sunye Electric.

Air compressor inverters are specialized inverters designed for various types of compressors. The main function of an inverter is speed regulation, which brings benefits such as stable performance, convenience, and energy savings, leading to increasingly widespread applications.
In terms of energy savings: After implementing variable frequency speed control, when the equipment's air demand decreases, the motor's speed can be reduced, thereby lowering motor power consumption to meet energy-saving requirements.
The relationship between the motor speed of an air compressor and its actual power consumption is linear. To reduce the actual consumption of the air compressor, the motor speed must be decreased. The principle and results of energy saving are as follows:
① After using this inverter, the pressure setting of the air compressor can be slightly adjusted to ensure it meets the production equipment's required pressure range. The inverter can adjust the compressor speed based on network pressure fluctuation trends, possibly eliminating offline operation of the air compressor, thus saving electricity.
② By using a variable frequency device, the system stabilizes the pressure in the pipeline, reducing or even eliminating pressure fluctuations. This allows all running compressors within the system to operate at lower pressures while meeting production requirements, reducing power losses caused by increased pressure.
③ Since air compressors may run at full load for extended periods, motor capacity is determined based on peak demand, usually resulting in oversized designs. In practice, the time spent under light loads is significant. Variable frequency speed control can greatly improve operational efficiency during these times.
④ Some adjustment methods cannot reduce motor operating power even when demand is minimal. With variable frequency speed control, motor speed can be lowered during low-demand periods, reducing motor power consumption and achieving further energy savings.
⑤ Most single-motor drive systems cannot continuously adjust according to load changes. After adopting variable frequency speed control, continuous adjustment becomes very convenient, maintaining parameters like pressure, flow rate, and temperature stability, significantly improving the performance of air compressors.
From an operational cost perspective: The operating costs of variable frequency air compressors far exceed their purchase costs, and as usage time increases, so do operating costs. Therefore, to save on operational costs later on, applying air compressor inverters has become an inevitable choice.
Sunye Electric Co., Ltd. (Changsha Sunye Electric Co., Ltd. was established in 2010; Shenzhen Sunye Electric Co., Ltd. was established in 2002) is a national high-tech enterprise integrating R&D, manufacturing, and sales of inverters, industry-specific all-in-one machines, servo drives, and new energy products.
Sunye Electric owns independent intellectual property rights. Its products have passed inspections and certifications by national authoritative institutions and have obtained multiple software copyrights and IP certificates. It invests heavily every year in researching new technologies and developing new products, with many patents and software copyrights granted. The company possesses core platform technologies such as construction hoist drivers, high-performance vector inverters, servos, and permanent magnet synchronous motor controls. Low- and medium-voltage inverters and servo drives are widely used in industries such as lifting equipment, stone processing, HVAC, machine tools, metal products, wire and cable, plastics, printing and packaging, textile and chemical fibers, building materials, metallurgy, coal mining, municipal services, and automotive applications. Guided by the philosophy of "innovation, technology, and strength," and driven by the corporate spirit of "unity, progress, pragmatism, and innovation," the company adheres to the business principle of "honesty and excellence, mutual benefit and coexistence." With a quality policy of "implementing total quality management and continuous improvement to pursue zero defects," Sunye Electric is committed to providing premium products to customers across various industries.
Address: Sunye Electric Industrial Park, No. 669 Xinsheng Road, High-Tech Zone, Changsha City
Tel/Fax: 0731-89932666 0731-89932688
Business Phone: 400-0755-731
Technical Support: 400-0755-731

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