Principle and product characteristics of frequency conversion energy saving for fans and pumps?

What are the energy-saving principles and product characteristics of frequency conversion of fans and pumps? The following Zhong Da Consulting will introduce you in detail.

As general machinery in industry, agriculture and life, fans and pumps have the characteristics of large application and wide application, and the power consumption of their supporting motors is also huge. According to statistics, the total installed capacity of motors in China is 450 million kilowatts, the total installed capacity of fans and pumps is 65.438+0.5 billion kilowatts, and the electricity consumption can reach more than 20% of the total power generation in China. Due to the capacity and technology, more than half of the fans and pumps have different degrees of power waste. In today's increasingly tight energy supply, it is urgent to reduce waste and save electricity, and it is particularly important to find an effective energy-saving product.

"Guojia" GJ frequency conversion energy-saving control cabinet for fan and water pump is an energy-saving product developed for the application defects of fan and water pump in China. It consists of frequency converter, external control, protection, display and other units and cabinets. It adopts the latest microcomputer and automatic control technology to control the traditional

The control mode is changed to intelligent automatic control, which greatly improves the working efficiency of the motor, improves the overall performance of the motor drive system, effectively reduces the running power of the fan and the water pump, prolongs the service life of the motor, and saves more than 20% electricity. It is an ideal energy-saving control device for modern fans and pumps.

Product principle

The traditional design of wind power environmental protection machine and water pump flow is based on the maximum demand, and its adjustment methods include damper, baffle, reflux, start-stop motor and so on. , can not form a closed-loop control, regardless of the concept of power saving. But in actual use, the flow will change with various factors (such as season, temperature, technology, output, etc.). ) and is usually much smaller than the maximum flow. In order to reduce the flow, usually only the opening of the baffle or valve can be adjusted, that is, the flow can be adjusted by lowering and raising the opening of the valve/baffle. The essence of valve control mode is to change the flow by changing the resistance of pipe network. When the required flow decreases, the pressure will increase, so the reduction of shaft power is limited. At this time, excessive power of fans and water pumps will lead to increased pressure and great energy loss.

According to the principle of fluid mechanics, the flow rate is proportional to the first power of rotating speed, the pressure is proportional to the square root of rotating speed, and the power is proportional to the cubic root of rotating speed. The variable-frequency energy-saving control cabinet of STB fan and water pump can adjust the flow by changing the speed of the fan under the premise of keeping the opening of the valve and baffle unchanged, and its essence is to save electricity by reducing the fluid power. This control method can fundamentally eliminate the power waste phenomenon of "big horse-drawn car" caused by type selection or load change in fan and water pump equipment, eliminate the throttling resistance of baffle, and make the fan and water pump always run in the best working state.

application area

Buildings: blower, circulating water pump, cooling water tower, roof exhaust fan, etc.

Metallurgical industry: blower, dust removal blower, heating furnace blower, cooling pump, fresh water pump, cooling exhaust fan.

Petrochemical industry: oil injection pump, sewage pump, fresh water pump, pressure pump, oil transfer pump, blower of heating boiler, induced draft fan, etc.

Power industry: boiler blower, induced draft fan, supply pump, circulating pump, drainage pump, mortar pump, blower, etc.

Textile chemical fiber: blower, cooling tower, fresh water pump, boiler fan, etc.

Paper mill: boiler fan, water pump, pulping machine, etc.

Product characteristics

1) is easy to install and use, and has strong applicability, and the power saving rate can be as high as more than 20%.

2) Realize the synchronous change of motor power consumption and load demand, eliminate the phenomenon of "big horse-drawn car" and reduce the power supply and distribution load.

3) It has good soft start and soft stop functions, avoiding strong current and mechanical shock, and effectively prolonging the service life of the equipment.

4) Automatic protection functions such as over-voltage, under-voltage and overload to prevent accidental damage to the equipment.

5) Manual and automatic power saving/mains conversion functions to ensure the normal operation of the equipment to the maximum extent.

6) High power factor output, reducing reactive power loss and compensation capacity, and reducing motor heating, extra loss and noise.

7) Improve the operating conditions of equipment, and reduce mechanical wear and maintenance personnel expenses.

8) It has the function of RS485 communication interface, which can realize the networking operation, monitoring and other functions of the energy-saving system.

For more information about project/service/procurement bidding, and to improve the winning rate, please click on the bottom of official website Customer Service for free consultation:/#/? source=bdzd