With the rapid development of electronic technology, VVVF technology has become a major development direction of modern electric power transmission technology in the AC speed regulation technology. It has a huge role in saving electricity, reducing maintenance, improving quality and output, and automating Industrialization is now widely used. From the traditional DC motor, slip motor drive, the transition to the application of frequency conversion technology, motor speed control methods have undergone major changes, it is necessary to drive the drive characteristics and effects of some exploration.
Throughout some of the brands of inverters at home and abroad, its characteristics are roughly as follows: you can use standard motor speed control, for other motor also has its uses; motor speed and miniaturization; explosion-proof; continuous speed; start current is small; Speed ​​control is not affected by the current; can adjust the acceleration and deceleration time; the introduction of vector control, to achieve rapid response and high precision control, you can replace the DC motor. On the inverter application effect, the main performance: energy saving; control automation to improve equipment reliability; improve control accuracy and equipment performance.
In the industrial and mining enterprises, these characteristics of the inverter can solve difficult problems in production and create enormous benefits for the enterprise. The most typical application of frequency changer, is to use the frequency changer to carry on the speed control to each kind of machinery energy conservation. In my factory mainly used in fan and constant torque transmission speed control. A characteristic of fan pumps is that the load torque is proportional to the square of the speed and the shaft power is proportional to the cube of the speed. Therefore, the former motor to run at a fixed speed, with a flap valve to adjust the air volume method, switch to the required air volume to adjust the speed to get a lot of energy-saving effect.
The actual speed control device, the efficiency of different control methods are different. Obviously, the inverter control is more close to the ideal curve, there is a more significant energy-saving effect. On the other hand, sintering machine disc feeder, electronic weighing belt and other constant torque load frequency control can also save energy. Obviously, a decrease of the motor speed will cause the output power of the motor to drop, and the input power of the frequency converter which is proportional thereto also decreases, that is, the power consumption decreases.
Ingredients is an important process in the sintering process, which is used in the sintering of iron-containing raw materials, flux, fuel and other raw materials in a certain percentage of mixing together and make the chemical composition of the materials together to meet the set requirements and to maintain Stability, the stability of the ingredients directly affect the level of sinter output and quality of good or bad. Before using the inverter control, raw materials, said electronic components using slip motor control, the use of low efficiency, high energy consumption and speed control structure is complex, maintenance difficult, poor production environment, equipment failure rate, loss, to the production zone Come a lot of unfavorable factors. Aiming at the problems existing in the original electronic scales, combined with the process equipment, the frequency conversion technology and computer technology are combined, and the pressure sensors are used to monitor in real time to form the electronic weighing control system of the raw material ingredients. After the operation of the raw material electronic weighing system put into operation, after the transformation of the ingredients control system, greatly improving control accuracy in the actual operation of convenient operation, testing accuracy.
Molybdenum can increase steel`s corrosion resistance in the acid-based solutions and liquid metals, thus improve its wear resistance, hardenability, weldability, and heat resistance. As an element which easy to form carbides, molybdenum can effectively avoid oxidation during steel making process, and it can be used alone or mix with other alloy element to achieve the best performance.
A pure molybdenum rod is a cylindrical bar made entirely of molybdenum, a chemical element with the symbol Mo and atomic number 42. Molybdenum is a refractory metal known for its high melting point, excellent thermal conductivity, and resistance to corrosion. Pure molybdenum rods are commonly used in various applications, including the manufacturing of electrodes, heating elements, and high-temperature furnaces. They are also utilized in the aerospace, defense, and medical industries due to their exceptional mechanical and thermal properties.
High temperature smelting additives
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