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Product DescriptionCompany Info.<>A dust removal fan motor10kV, rated current229A, power factor0.87, if the use of ordinary soft start, according to experience impulse current in3.5times the rated current of the motor, full production after the design of the incoming line capacity can not start the fan load, the user design can only consider the use of frequency converter start-up scheme, and the need for frequency conversion undisturbed switching function.
ADSVGseries high-voltage inverter with high-speedDSPas the control core, speed sensorless vector control technology, power unit series multi-level technology, is ahigh-high voltage source inverter, its harmonic index is far less thanIEEE519-1992harmonic standards, high input power factor, good output waveform quality, do not need to use input harmonic filter, power factor compensation equipment
Set and output filter; there is no harmonic caused by motor additional heat and torque ripple, noise, outputdV/dt, common mode voltage and other problems, you can use ordinary asynchronous motor.
Inaddition to the performance of ordinary high-voltage inverters, Aodong Electric's ADSVG series high-voltage inverters also have the following outstanding features:
(1) high-performance vector control, large starting torque, fast torque dynamic response, high speed regulation accuracy, strong load capacity, improve the stability of equipment operation;
(2) Oscillation suppression technology, using superior current algorithm, effectively suppress the oscillation of light load motor current, ensure stable and reliable work of the system;
(3) Fast start-up technology, especially suitable for (such as cement plant high temperature fan) frequency conversion protection after the restart, can realize the inverter within0.1sfrom the protection state reset to load operation;
(4) Power grid instantaneous power-off restart technology, power grid instantaneous power-off can automatically restart, can provide * long60swaiting time;
(5) Line voltage automatic equalization technology. After a unit fault occurs in a phase of the inverter, it can ensure a large line voltage balanced output;
(6) Industrial and frequency conversion undisturbed switching technology, which can meet the needs of multi-motor comprehensive control and large-capacity motor soft start; it can realize two-way undisturbed switching of large-capacity motors, which can effectively ensure the normal operation of production;
(7) Output voltage automatic voltage regulation technology, inverter real-time detection of each unit bus voltage, according to the bus voltage adjustment output voltage, so as to achieve automatic voltage regulation function;
(8) Fault unit thermal reset technology, if the unit fails in operation, and the frequency converter continues to operate on its bypass, then the fault unit can be reset in operation without waiting for the frequency converter to stop;
(9) A variety of control methods, can choose local control, remote control box control,DCScontrol, supportMODBUS,PROFIBUSand other communication protocols, frequency setting can be given on the spot, communication given, etc., support frequency preset, acceleration and deceleration functions;
(10) Unit DC voltage detection: real-time display of the DC voltage of the detection system, so as to achieve optimal control of the output voltage, reduce the harmonic content, ensure the accuracy of the output voltage, improve the system control performance, and ensure that the operation and maintenance personnel achieve a comprehensive grasp of the power unit operating conditions;
(11)Theelectrolytic capacitor in the unit can double its service life due to the company's patented technology;
(12) With burst phase short circuit protection function. If the output short circuit is caused by equipment reasons and other reasons, if the inverter does not have the phase-to-phase short circuit protection function at this time, it will lead to a major accident. When similar problems occur, the inverter can immediately block the output of the inverter to protect the equipment from damage and avoid accidents.
(13) Current limiting function: When the output current of the inverter exceeds the set value, the inverter will automatically limit the current output to avoid overcurrent protection caused by the inverter during acceleration and deceleration or due to sudden load changes. * Minimize the number of shutdowns;
(14) Fault self-reset function: When the inverter unit or the whole machine overcurrent protection due to load mutation, it can automatically reset and continue to operate.
Control Scheme of Main Circuit of High Voltage Inverter
According to the requirements of the site, the compressor adopts“one-for-one”operation mode,
Configure automatic bypass cabinet with primary circuit asshown in the figure.
automatic bypass cabinet
A control system for frequency conversion and power frequency switching of a high-voltage frequency converter comprises a high-voltage frequency converter, an input contactor KM1, a frequency conversion contactorKM3, a power frequency contactorKM4and a power frequency sampling module, wherein the high-voltage frequency converter isconnected with a power grid through the input contactor KM1; the high-voltage frequency converteris connected with a motor through the frequency conversion contactor KM3; the motorisconnected with the power grid through the power frequency contactor KM4; and the high-voltage frequency converter collects amplitude, frequency and phase of power frequency power grid voltage and current of the power frequency contactor KM4 through the power frequency sampling module. High voltage inverter can control the input contactorKM1, variable frequency contactorKM3and power frequency contactorKM4to realize the undisturbed switching of variable frequency switching power frequency. The implementation process is as follows:(1)The high voltage inverter collects the amplitude, frequency and phase signals of the power grid voltage and the current signal of the power frequency contactor KM4 through the power frequency sampling module;
(2) Adjust the output voltage of the high-voltage inverter to be consistent with the grid voltage;
(3) Attraction power frequency contactorKM4;
(4) Judge the current of power frequency contactorKM4. If the current of power frequency contactorKM4is greater than the preset value, block the output of high voltage inverter;
(5) Disconnect frequency converter contactorKM3.
How undisturbed switching works
the operation principle and that operation proces are as follows: the pow frequency sampling module comprises a voltagesampling circuit and a current sample circuit; the signal of the voltage sampling circuitis decomposed into amplitude, frequency and phase signals of a power grid voltage through a single-chip microcomputer signal, and istransmitted to a main control system of a high-voltage frequency converter through an optical fiber communication circuit 1, and is used for adjusting the output voltage amplitude, frequency and phase of the high-voltage frequency converter by the main control system
Thedifference between the optical fibercommunication circuit1and the optical fiber communication circuit2is that the optical fiber communication circuit1is serial communication and periodically sends data; and the optical fiber communication circuit2 convertsthePWMsignal into an optical signal and sends the optical signal in real time to ensure that the main control system of the high voltage frequency converter can respond to current changes in time.
When the high-voltage frequency converter receives a power-frequency signal, the main control system of the high-voltage frequency converter adjusts the output voltage of the high-voltage frequency converter to be consistent with the power-frequency grid voltage uploaded by the power-frequency sampling module; then the power-frequency contactor KM4 is attracted, and the current of the power-frequency contactor KM4 is judgedat the same time; whenthe current on the power-frequency contactor KM4 is detected to be greater than a preset value, the main control system judges that the power-frequency contactorKM4 has been switched off.
Close, then block the output of the high voltage converter, stop; prevent the formation of circulating current between the high voltage converter and the power grid; disconnect the variable frequency contactor KM3 after the high voltage converter stops, and complete the frequency conversion process.
Compared with the prior art, the scheme realizes the uninterrupted control process of frequency conversion switching of a motor to a power frequency power supply under the condition that an output reactor of a high-voltage frequency converter is not increased, solves the problem of impulse current to the motor under an off-line switching mode of frequency conversion to power frequency, and solves the problem that a reactor needs to be increased under an on-line switching mode of frequency conversion to power frequency.
- Name（chinese）
- Name（English）
- Xiangyang Aodong Electric Co., Ltd.
- China credit code
- Identity Verification
- Product Category
- Soft starting classReactive power compensationSpeed regulation
- Address
-
of Xiangfan in, China
- Nearby port
- Dalian,Qingdao,Yantai,Rizhao,Lianyungang
Xiangyang Aodong Electric Co., Ltd. is headquartered in Xiangyang, Hubei, a famous historical and cultural city in China. It is a production-oriented high-tech enterprise integrating science, industry and trade in the high-tech industrial technology development zone of Xiangyang City. The company has successively passed ISO9001 quality management system certification, ISO14001 environmental management system, EU CE certification and national quality compulsory system 3C certification, and has won the title of National Quality, Reputation, and 3A Enterprise. Its products have been listed as national key Torch Plan projects many times and won national, provincial and municipal scientific and technological progress awards. The company has a professional team of R & D and design engineers and rich engineering project management experience accumulated over the years. It has established close cooperative relationships with well-known domestic colleges, universities, and scientific research institutes. It is professionally committed to motor soft starting, frequency conversion speed regulation, energy conservation control, R & D, design, production, marketing and service of products such as power quality optimization, high-voltage fire inspection cabinets and power equipment. Products are widely used in many industrial fields of national production such as power electronics, aerospace, petrochemicals, metallurgical building materials, coal mining, plastic textiles, biopharmaceuticals, automobile shipbuilding, port municipal administration, solid waste papermaking, water conservancy and water affairs, and national defense and military industry. It provides customers from all walks of life with high-quality engineering application solutions and general engineering contracting services, and has won praise and favor from customers with its high-quality, high-performance products and complete after-sales service system. The marketing network covers all provinces, cities, and autonomous regions across the country, and is exported to more than 10 countries and regions such as the United States, Russia, Southeast Asia, the Middle East, and Africa. It enjoys high reputation and brand awareness among users and the same industry. The company always adheres to the business policy of "scientific management, quality-oriented, integrity, and customer first". Adhere to the spirit of "people-oriented" corporate culture. "Perseverance and pursuit of excellence" is the corporate vision. Continuously create value for customers and provide customers with satisfactory services. Cooperation and development to create the future together. Work together for win-win cooperation!- Name（chinese）
- Name（English）
- Xiangyang Aodong Electric Co., Ltd.
- China credit code
- Identity Verification
- Product Category
- Soft starting classReactive power compensationSpeed regulation
- Address
-
of Xiangfan in, China
- Nearby port
- Dalian,Qingdao,Yantai,Rizhao,Lianyungang
Xiangyang Aodong Electric Co., Ltd. is headquartered in Xiangyang, Hubei, a famous historical and cultural city in China. It is a production-oriented high-tech enterprise integrating science, industry and trade in the high-tech industrial technology development zone of Xiangyang City. The company has successively passed ISO9001 quality management system certification, ISO14001 environmental management system, EU CE certification and national quality compulsory system 3C certification, and has won the title of National Quality, Reputation, and 3A Enterprise. Its products have been listed as national key Torch Plan projects many times and won national, provincial and municipal scientific and technological progress awards. The company has a professional team of R & D and design engineers and rich engineering project management experience accumulated over the years. It has established close cooperative relationships with well-known domestic colleges, universities, and scientific research institutes. It is professionally committed to motor soft starting, frequency conversion speed regulation, energy conservation control, R & D, design, production, marketing and service of products such as power quality optimization, high-voltage fire inspection cabinets and power equipment. Products are widely used in many industrial fields of national production such as power electronics, aerospace, petrochemicals, metallurgical building materials, coal mining, plastic textiles, biopharmaceuticals, automobile shipbuilding, port municipal administration, solid waste papermaking, water conservancy and water affairs, and national defense and military industry. It provides customers from all walks of life with high-quality engineering application solutions and general engineering contracting services, and has won praise and favor from customers with its high-quality, high-performance products and complete after-sales service system. The marketing network covers all provinces, cities, and autonomous regions across the country, and is exported to more than 10 countries and regions such as the United States, Russia, Southeast Asia, the Middle East, and Africa. It enjoys high reputation and brand awareness among users and the same industry. The company always adheres to the business policy of "scientific management, quality-oriented, integrity, and customer first". Adhere to the spirit of "people-oriented" corporate culture. "Perseverance and pursuit of excellence" is the corporate vision. Continuously create value for customers and provide customers with satisfactory services. Cooperation and development to create the future together. Work together for win-win cooperation! -
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