In the working process of a single-phase variable-frequency power supply, the control circuit is in effect. What is the structure of the control circuit of the single-phase variable-frequency power supply? The experts of Instrument World World Network below will introduce the control system of single-phase variable frequency power supply. The control circuit mainly includes the control power supply, SA866-based SPWM wave generator, isolation drive and protection circuit. The DC voltage obtained...
According to monitoring by Beijing's environmental protection department, in this year's hazy weather, PM2.5 pollution caused by coal-fired central heating accounts for more than 50% of the total, exceeding the pollution of automobile exhaust. In fact, it is precisely because the haze pollution caused by coal burning is very serious. Many countries in the world are controlling the emission of coal by controlling the haze. Therefore, how to reduce the amount of coal burning has naturally...
In addition to the installation and commissioning of the frequency converter, in addition to strictly following the requirements of the operating instructions, the following issues must be noted: 1. The shielded wire is used for the wiring of the control terminal, and one end of the shield layer should be grounded to ensure that the remote control is not interfered. 2. The wiring of the control terminals can not be mistaken, especially the 220V or 380V power line can not be wrongly connected to...
With the development of power electronics, microelectronics and control theory, inverters have been widely used in AC motor speed control. "Variable speed" has become almost synonymous with automation. The main features of the inverter are good control performance and high efficiency drive performance. The application of frequency converters in the machinery industry is an important means to transform the traditional industries and realize mechatronics integration. In the automation...
Section III HARSVERT-VA Series Features and Applications In the previous two series of articles, the background knowledge of the HARSVERT-VA series of speed-sensorless vector control high voltage variable frequency speed control products was introduced—the basic principles of digital signal processor (DSP) and vector control. This article will introduce HARSVERT-VA. The technical features and applications of the series. First, HARSVERT-VA series high voltage variable frequency speed control...
Abstract: This article describes the application of Siemens full communication system on ship unloaders and how to achieve Siemens AC drives to achieve speed synchronization and current control for grab control, optimization, and improve ship unloader operation efficiency. Keywords: AFE/power plant unloader/crane/master/slave control/speed synchronization/current balance 1 Introduction Since the reform and opening up, China’s economy has developed rapidly and industrial manufacturing has also...
Abstract : This paper analyzes the process and reliability requirements of 600 MW thermal power unit double-induced fan, and introduces the technical scheme and energy-saving of the frequency conversion reform of the double-induced fan of #1 furnace of Zinvert series high-voltage frequency conversion debugging system in Hunan Datang Huayin Jinzhushan Thermal Power Generation Branch. The application of the effect provides a certain experience for the application of the high voltage variable...
Abstract : This paper introduces the reform plan of high-voltage frequency converter used in coal mine underground air compressor of Henan Hebi Zhongtai Mining Co., Ltd.; introduces the basic structure and working principle of multi-level high-voltage frequency converter drive system, application notes and experimental data, and finally Gives energy-saving analysis. Keywords :multilevel; frequency converter; energy saving; closed loop; sinusoidal pulse width modulation Design and Analysis of...
Danfoss, as the world's leading supplier of refrigeration control equipment, has been committed to new technologies and new applications for system energy saving and optimization. ADAP-KOOL® Cooling Inverter (AKD) is an important part of Danfoss AK series refrigeration control products. Using AKD will bring better energy-saving and system optimization to supermarket customers. Taking the application of condensing fans as an example, the energy saving ratio for the entire system is 5 to 7%....
The methods for solving the synchronization of operating equipment mainly include servo motors, stepping motors, mechanical linkage, and inverter-driven ordinary asynchronous motors. Servo motor has complex structure, high cost and high precision. It is mainly used in high-precision synchronous operation equipment system; stepper motor is easy to implement variable speed control because of its different motor structure, but it has weak load capacity and costs. The disadvantages of high and low...
1. I think that the principle of soft-start is to use solid-state relays (or triacs), through phase-shift triggering (or zero-crossing triggering), Motor speed regulation. The frequency converter starts the motor process is the frequency conversion velocity modulation, in the work movement may carry on the forward rotation speed control, the brake, the reversal speed control, the frequency conversion movement and so on the electric motor work. 2. The frequency conversion is started by changing...
The basic difference between transistor inverter power supply and high frequency variable frequency power supply From the aspect of appearance, the size and weight of the transistor inverter are also large and medium, and the high-frequency inverter has the same small power and light weight. From the material point of view, the main components used in the transistor are the low-frequency transistor components, and the transformer is isolated and output. There are two main transformers, one...
What is variable frequency power supply After the AC-DC-AC conversion double inverter power supply is called variable frequency power supply, it is different from the frequency conversion speed controller used for motor speed regulation. It is also different from ordinary AC regulated power supply. The main function of the variable frequency power supply is to transform the existing AC grid current into a stable, pure sine wave power at the desired frequency. The ideal AC power supply is...
Today, looking at home appliance stores, "frequency conversion" has become the mainstream technology. Inverter air conditioners, frequency conversion washing machines, inverter refrigerators, variable frequency water heaters, variable frequency microwave ovens, etc. are all around. Air conditioners, refrigerators, and washing machines, which are almost all white electric products, have entered the era of frequency conversion. Industry experts believe that the advantages of being more...
In 2012, under the overall downward trend of the washing machine market, drum washing machines still have good growth, which has become a must for enterprises. According to data from Zhong Yikang, the proportion of retail sales of drum washing machines in the market was 25.9%, a year-on-year increase of 1.6%, and retail sales accounted for 46.6%, a year-on-year increase of 2.5%. The volume of retail sales of the Washing Machine Market dropped by about 14%. The market for single-cylinder and...
Beginning in September, a new round of “new-for-new” activities for new-day electric vehicles has also begun slowly. After harvesting the hot and high exchange volume in August, Xinri Electric Vehicle will continue to redouble its efforts in September to deliver the “new trade” benefits to more regions and benefit more people. The "replacement of new frequency conversion power" will further highlight the "frequency conversion" technology of one of the three major new...
Sentry VF Metal Detectors truly have variable frequency detection capability, eliminating the limitations of a single frequency and providing higher sensitivity for users who need to test multiple products. Traditional single-frequency metal detectors require internal adjustments when testing products composed of multiple materials, which can take several hours and can delay production planning. To solve this problem, some metal detector manufacturers have developed two or three frequency...
Not long ago, ZJ70DB1 AC variable frequency drilling rig, ZJ30DBT trailer-mounted AC variable frequency drilling rig and ZJ50DB AC variable frequency drilling rig developed and developed by Shaanxi Baoji Petroleum Machinery Co., Ltd. passed acceptance and were delivered to the oilfield. The three drilling rigs integrate electricity gathering, electricity, gas and liquid control, and digital instrumentation and communication. They can realize automatic drilling and dynamic braking during...
On January 6, the ZJ70DB1 AC variable frequency drilling rig, ZJ30DBT trailer-mounted AC variable frequency drilling rig and ZJ50DB AC variable frequency drilling rig developed and developed by Shaanxi Baoji Petroleum Machinery Co., Ltd. were simultaneously accepted and delivered to the oilfield. The three drilling rigs integrate electricity gathering, electricity, gas and liquid control, and digital instrumentation and communication. They can realize automatic drilling and dynamic braking...
1 Introduction In the AC motor frequency control, the PWM control has been widely used, among which the classic sine pulse width modulation (SP-WM), which mainly focuses on making the output voltage of the inverter as close to the sine wave as possible. The fundamental components of the PWM voltage wave are as large as possible and the harmonic components are as small as possible, but this method is only an approximation and the ability to suppress harmonics is limited. The voltage space vector...
The traditional control system design is based on the known mathematical model of the system. Therefore, the quality of the control system has a lot to do with the accuracy of the mathematical model. However, the actual system is very diverse and complex, and it is difficult to find a suitable description model. For a nonlinear system, it is more difficult and sometimes impossible. Neural networks are used to control system design, but it is not necessary to control the mathematical model of...
The frequency conversion hot porcelain tile is no stranger to us, because it can change the speed of heat, so it has been praised by consumers, but the recent spread of the Internet on the frequency of heat ceramic tiles will cause cancer, so that some people are skeptical, So today Xiao Bian wants to introduce to everyone is the hazard of frequency conversion hot porcelain tiles and how to choose the frequency conversion hot brick. The hazard of variable speed hot porcelain tiles 1. Is the...
Through the concerted efforts of the market operations department, technical quality department, and manufacturing department of the special electrical company, the special electric company recently completed the development of wind power AC variable frequency pitch motor, which has large torque, light weight, and small size. The features such as strong overload capacity have been sent to the client unit for on-site commissioning. During the development process, due to the short lead times...
Introduction: Xiao Bian as an outsider after reading the following content finally understand what is the frequency conversion machine, the summer is finally not fainted. Shaoyou below we have a trick to distinguish between variable frequency motor and ordinary motor. Inverter motor - used for motors with special frequency converters. Its difference from ordinary motors lies in the addition of strong cooling fans. The power of the fan comes from a separate power source and cannot be discharged...
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.