Pump speed is generally slow down the problem. When the use of frequency control, the original design by the frequency of the state of the pump and motor operating parameters have undergone major changes in addition, such as pipeline characteristics curve, speed governor pump in parallel with the constant speed pump and other factors, will be Speed range has a certain impact. Out of range speed control is difficult to achieve the purpose of energy conservation. Therefore, frequency conversion...
Affected by the macroeconomic environment, China's inverter market in 2012 is not ideal. According to the company announced 2012 earnings, ABB Group sales in 2012 was about 3.7 billion yuan, Siemens sales of 3.4 billion, while the state-owned inverter brand leader Huichuan inverter business sales of 897 million, of which high-pressure Inverter business is about 15 million, INVT sales of 618 million yuan. According to the statistics of research institutes, the market potential of inverters...
[Asia pump network hearing] variable frequency constant pressure pump installed as required to ensure its normal operation. Next, Xiao Bian and everyone introduced DYWPX2 variable frequency pump installation requirements are there? DYWPX2 variable frequency constant pressure pump First, the installation of environmental requirements 1. Ambient temperature: 0 ℃ -45 ℃ cut communication is good, below zero, please do a good job pump insulation insulation. 2. No water droplets, steam, no floating...
Pump speed is generally slow down the problem. When the use of frequency control, the original design by the frequency of the state of the pump and motor operating parameters have undergone major changes, the other as pipeline characteristics curve, speed governor pump in parallel with the constant speed pump and other factors, will be Speed range has a certain impact. Out of range speed control is difficult to achieve the purpose of energy conservation. Therefore, frequency conversion speed...
Pump speed is generally slow down the problem. When the use of frequency control, the original design by the frequency of the state of the pump and motor operating parameters have undergone major changes, the other as pipeline characteristics curve, speed governor pump in parallel with the constant speed pump and other factors, will be Speed range has a certain impact. Out of range speed control is difficult to achieve the purpose of energy conservation. Therefore, frequency conversion speed...
In the last decade, from low-capacity AC drives to large-capacity AC drives, from simple open-loop systems to complex closed-loop systems, people are continually trying out applications and enjoying the great benefits that it has for human society. It is used as speed governor in AC motor which is easy to use and inconvenient to adjust speed, and it is not easy to adjust the speed of AC machine in the past either from process requirement or electrical energy saving need. Similarly, the...
Abstract: As a new multi-point arrangement of circulating pump, distributed variable frequency pump system has the characteristics of saving electric energy and operating cost compared with single-point arrangement of circulating pump in traditional heating pipe network. This article describes in detail, and for the system design and application should pay attention to a number of issues put forward solutions, with a view to blaze new trails and improve together. Keywords: distributed variable...
Recently, at the "China-Denmark Climate Change Summit" jointly organized by the Danish Embassy and China's National Development and Reform Commission, a new McKinsey analysis pointed out that if all inefficient pumps are replaced by high-efficiency variable-frequency pumps, by 2020 , The emission reduction potential of carbon dioxide equivalent will be reduced to 135 million tons / year. And Denmark Grundfos developed a series of high-efficiency variable frequency pump performance...
[China Aluminum Industry Network] Qingfeng has experienced more than ten years of development, and has created the Qingfeng brand, which is known for its high efficiency and reliability. After research and development and user comparison of data, it verified the energy efficiency of Qingfeng variable frequency magnetic levitation chiller. First, the main features of Qingfeng Maglev frequency conversion chiller: Frequency conversion: The compressor has a built-in frequency converter, which can...
Shaanxi Shaanxi Coal Caojiatan Mining Co., Ltd. Caojiatan Mine Main Inclined Shaft Belt Conveyor Equipment Purchase Package III: Caojiatan Mine Main Inclined Shaft, Large Lane Belt Conveyor Variable Frequency Drive, Central Control System and Main Well 10kV Substation power monitoring system equipment procurement tender notice Tender conditions This bidding project Shaanxi Shancun Caojiatan Mining Co., Ltd. Caojiatan Shaft Main Inclined Shaft Belt Conveyor Equipment Purchasing Package III:...
In recent years, the term “frequency conversion” has appeared more and more in home appliances, not just air conditioners. Other home appliance categories such as refrigerators, washing machines, and water heaters have gradually become frequency-inverted, which is mainly to save power and make them more efficient. The work has also gained market recognition. But you can't hear about TV, you haven’t heard of it! Recently, “Variable Frequency TV” has emerged as a new species and has become a...
Recently, the National Radio and TV Product Quality Supervision and Inspection Center organized technical experts to analyze the display technology of Konka R1 inverter TV. The analysis report shows that the technology of chip frequency conversion, backlight frequency conversion and screen frequency conversion adopted by Konka R1 frequency conversion television can effectively increase the refresh frequency, change the contrast and adjust the backlighting frequency in real time, and is in line...
Recently, the 7000kW pump test station experimental frequency conversion power supply project of Hunan Southern Changhe Pump Co., Ltd. undertaken by the new scenery company successfully passed the user acceptance and was highly evaluated. This is another important result achieved by the new scenery in the field of variable frequency power supply. Nanchang Changhe Pump Pump Testing Center is the most advanced and the most advanced water pump testing center in Asia. The key equipment of the test...
The cross-section of the silicone variable-frequency cable is 1 times larger than that of the conventional cable. Silicone inverter cable rated voltage is 0.6/1kV and the following frequency conversion control system for power cable or electrical connection, the advantage is - with a strong voltage impact resistance, can withstand the pulse voltage at the time of the frequency, the cable has a good shielding, And effectively eliminate electromagnetic interference, reduce the frequency of motor...
0 Introduction The circulating water system is the "blood" of a thermal power plant and its performance directly affects the output of the generating unit. Maoming Thermal Power Plant originally designed 2 sets of 100MW units to run in parallel when 3 sets of circulating pumps supply water, about 30,000m3; 1 set of 100MW sets when full load operation, 1 pump water supply can not meet the unit operation requirements, when the power grid peak load is low, 1 The pump water supply can...
We know that large-scale power transformers, steam turbines, and hydro-generators, power cables, and other capacitive devices must be tested strictly in accordance with the relevant regulations before they are put on the market. Only when they meet the requirements can they enter the market for sale. However, due to the traditional power frequency withstand voltage The device is often difficult to carry because of its large size, heavy weight, inconvenient handling, and inconvenience to any...
The frequency conversion cable is mainly used to connect the power supply with the inverter, inverter, and electrical equipment. Its laying space is relatively small, and the voltage level is relatively high (up to 8.7/15kv). During its operation, a large amount of electromagnetic waves will be generated, which will generate strong interference with the surrounding power supply and power system. This requires better shielding measures for the inverter cable. Therefore, phase-frequency shielding...
I. Introduction of sintering in Jinan Steel Jigang's existing sintering machine 5: Three 120m2 sintering machines, corresponding to 1#, 2#1750m3 blast furnaces and one 320m2 sintering machine, corresponding to 3#1750m3 blast furnace and one 400m2 sintering machine, corresponding to one 3200m3 blast furnace and 120m2 sintering machine, three main pumping motors 4000kW, and a damper opening of 100 %, there is no advantage to using a frequency converter. 320m2 sintering machine main exhaust...
I. Project Overview Baosteel Stainless Steel 1780 hot-rolled descaling system was designed by Mitsubishi Corporation of Japan. High-pressure descaling motor was manufactured by Japan Mitsubishi and Shanghai Electric Machinery Factory. China Metallurgy Saidi was responsible for engineering design. The system was officially put into operation in December 2003. The rolling steel grades of Baosteel Stainless Steel 1780 Hot Rolling Mill are stainless steel and carbon steel. The working time of...
0 Introduction The circulating water system is the "blood" of a thermal power plant and its performance directly affects the output of the generating unit. Maoming Thermal Power Plant originally designed 2 sets of 100MW units to run in parallel when 3 sets of circulating pumps supply water, about 30,000m3; 1 set of 100MW sets when full load operation, 1 pump water supply can not meet the unit operation requirements, when the power grid peak load is low, 1 The pump water supply can...
1 Introduction Coal blending is a large-scale industrial production method. According to different coal-fired uses, artificially created coal is the most ideal and economical coal that natural coal does not possess. Blended coal is a blended coal made up of several different kinds and types of coal blended in a certain proportion. Although it has some characteristics of its component coal, its comprehensive performance has changed, and it is actually a new "coal species" processed by...
The traditional power frequency pressure resistance devices are often large in size and heavy in weight, and are not convenient for on-site transportation. They are not convenient for any combination and have poor flexibility. In practice, the AC withstand voltage tests of various large-scale power transformers, power cables, turbines and turbine generators and other capacitive devices must be conducted in strict accordance with the test procedures. The traditional power frequency withstand...
The main function of the series resonant withstand voltage test equipment (frequency-converter series resonant device) is series resonance. In the operation of the power equipment, the insulation will gradually deteriorate due to the effects of electric field, temperature and mechanical vibration, including overall deterioration and partial deterioration. defect. The frequency AC voltage withstand test is the most effective and direct method for identifying the dielectric strength of electrical...
Frequency control in the polypropylene filament drawing equipment transformation.pdf Frequency control in the polypropylene filament drawing equipment transformation.pdf
Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.
Fill in more information so that we can get in touch with you faster
Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.