Modern load and modern small and medium-sized synchronous generators explore Nanchang Modern Special Wuyuan Research Institute Nanchang City, 33002 Meikun also factory 1 water conservancy and hydropower, 0 special school Lu Shuqing, your micro-machine factory Liu Jianping proposed a new modern 1 step generator set juice new Take the test.
Descriptors; m-step generator design 1 Overview In recent years, with the rapid development of power electronics technology, there have been many revolutionary changes in the use of electrical loads, and there have been many new approaches to the design of generators in previously unutilized power sources.
The step generator can bring a new type of modern load. For example, in the synchronous generator product specification, the British Bruce Company first proposed the new function of its generator with modern controllable rectification load in the late 19th. During the period, some small and medium-sized synchronous generator manufacturing companies in the world, such as the British Stanford company, Senma, Italy, the United States and Europe, have stated in their product samples or specifications that their products can carry nonlinearities such as controlled rectifier loads. Load, the author of this article in the process of cooperating with colleagues to develop new products, also encountered many of these situations and questions, found that a new type of modern load is compatible with the modern synchronous hair dryer. According to the experience of the development of new power supply for many years, Guante proposed to explore with you. 2 Modern load and its modern load bring new questions. Modern load refers to the light compared with the original traditional load. Resistance furnace transformer motor fluorescent lamp, etc. but under its load, it only produces active current; the first is inductive linear negative 1 Li Fahai. Electrical engineering. Science Press, 1991.
Li Haohuo. Electrical energy saving technology. Water Resources and Electric Power Press, 1987.
Load, which produces both active current and inductive reactive current but in recent years. With the rapid development of the electronic technology and the advancement of science and technology. There are many loads that are different from the traditional load, we collectively refer to the modern load 2.1 modern load brief introduction of modern load is also diverse, the following describes some typical 21.1 old linear load nonlinear load means that its load impedance value is nonlinear . It can cause severe distortion of the generator's output current and voltage waveform. The non-linear load has the following uncontrolled rectifier circuit loads; the controllable rectifier circuit is often used in the load-switch; the switching power supply circuit load is recently adopted by the new type of communication switch; the uninterruptible power supply load computer and other information equipment are commonly used; 21.2 Electromagnetic compatibility load Some electrical and electronic equipment power load will emit a serious electromagnetic interference wave, affecting the normal operation of the 0-action excitation system of the 1-step hair dryer. We call this type of load electromagnetic compatibility negative, for example Radar type electromagnetic interference Ge load 浼 21.3, dynamic power supply load also brings design and production of generators a new question. Many new questions before the end 2.1 Synchronous generator or unit electromagnetic compatibility Q. According to the traditional synchronization Generator and its power supply network theory, people used to only evaluate the various high-order harmonic voltages of the generator itself to the wireless barking of the electrical equipment, and the corresponding indicators to assess. However, in recent years, there has been a so-called electromagnetic compatibility problem, that is, not only the generator should consider the radio interference of the high-order harmonic voltage to the electric equipment, but also the electromagnetic wave emitted by the electric equipment to the generator. In the design stage of the hairpin machine, measures should be taken to prevent it. For example, we encountered this situation in 1986. The new radar developed by a radar equipment manufacturer in China is equipped with a brushless brush from a well-known power supply factory in China. The type of mobile power station, the power station is affected by the electromagnetic interference of the load and can not work normally + the hair dryer does not interfere with the radar load. The generator is also not affected by the interference of the magnetic wave of the gongda 屯. 22.2 Synchronous generator with capacitive load. After the synchronous generator has a capacitive load, after our practice, we will find that the voltage regulation is out of control. The occurrence of over-voltage is due to the development of modern letter technology, the use of the counting machine and the bamboo control, the management system is heavily adopted, and the power supply reliability is highly valued. The power supply must not be allowed to be in any state of suspension, and the power supply must be automatically switched. In order to ensure that the demand load such as power supply is the automatic power supply load, it puts forward new requirements for the power supply generator. 2.4 The capacitive load has realized the industrial production of large-capacity high-voltage capacitors due to the advancement and development of science and technology. In the past, rectification with reactor filtering. Variable current design, now a large number of capacitor filters, so that the equipment size is greatly reduced, the weight is greatly reduced, especially in the military, it has a special significance, so there is a capacitive load, and in some occasions, the integrated load of the generator The nature also shows the nature of the capacitive load. An example of a capacitive load is described below. I am obsessed with the research by the team.
The test results of the power supply for the load nature are as follows: 1 test circuit, 1 winter 2 test results ahead of the national standard table 332083, the load of the general phase synchronous generator should be basically the relative load, with unbalanced load capacity , must not exceed the phase of the active power ahead of the 25, but in recent years, there has been a å‘œ belt ratio unbalanced load 2 2.31 step generator belt. 1 linear load 4 magnetic pollution, the power supply system waveform is seriously deteriorated, and even the peak overvoltage affects the safety of the electronic device; especially for the independent power supply system with smaller capacity, the impact is more serious. Produce + good influence. Let it be able to work normally, privately due to the serious distortion of the voltage waveform and the burning of the load equipment, the most accidental accident occurred in the research institute, and the tens of thousands of children were charged with the electromagnetic pollution of the linear load. After the test, the data is recorded as follows: servant power communication machine empty carrier-shaped distortion rate 3.8 389 lag Tian Qi variability 7. Full load 4 switching power supply distortion rate 17.1. Power supply system åž åž åºœ 府 专门 专门 specially designed 21 Jia brushless Generator, with 1.51 into 1 empty carrier-shaped distortion rate full load 3, 0.9 lagging Tian Qi variability 3. View full load with switching power supply distortion rate power supply system stable, working normally 3 modern synchronous generator modern synchronous generator is corresponding to modern load The author of the emergence and emergence of the modern small and medium-sized synchronous generator excitation system in the nine years of cooperation with colleagues, the first book put forward the concept of modern synchronous generators published by the mechanical industry press after more than ten years of development, Modern synchronous generators have a deeper internality. It is not only a synchronous generator with a modern excitation system, but also a modern load that can only carry a nonlinear load. A new type of modern synchronous generator, designed with performance in the traditional synchronous hair dryer. There are qualitative changes to the modern requirements of modern step generators. The new requirements are as follows: 3.1 With reliable automatic excitation function, this is the functional requirements of modern power plants.
3.2 has a fixed steady-state short-circuit current multiple and its maintenance time is not less than 3 times the rated current maintenance time 5 seconds 332083, this function is required to make the power supply system has a power selection 3.3 has good electromagnetic compatibility ability 3.4 In the 1993 standard with non-linear load and uninterruptible power supply capacity, there is a new requirement for a safe generator set with an uninterruptible power supply unit. The door is designed to pass a brushless synchronous generator. The brushless synchronous generator is not only the brushless synchronous generator. It has a powerful starting and dissimilar motor capacity of 0.9 ties and has a good capacity with capacitive load. When fully loaded, we achieve a leading power factor of 18 lead; at this time, the voltage adjustment range is 2258, and the voltage regulation index is ±0.8. Spin.
3.6 has good dynamic characteristics and the ability to start asynchronous motor 3.7 has the ability to load with severe phase imbalance 4 modern synchronous generator design method new thinking to meet the new requirements of the above modern synchronous generator, the design idea and method of synchronous generator must be With new innovations, we will adopt the new sinusoidal winding design technology and method called the orthogonal excitation technology design method. With the design of the good rotor damping system, the electromagnetic parameter design of the motor is called the excellent composite adjustment excitation system design. View and so on. Analysis and design of excitation excitation system for modern small and medium-sized synchronous generators. Mechanical Industry Press, 1988.
2 rest politics. A new type of sinusoidal winding. Mobile resources, 1983.
3 Qiu Sheng wins and so on. Development of a new power filter. Journal of Nanchang University, W`W3. Received 20001214 Book Motor Fault Diagnosis and Repair Manual Use this manual, even if it lacks precious special equipment and precision instruments, it can accurately find out the cause of the fault and carry out effective repair to achieve the expected effect. The content is extremely rich, and it is called the motor repair, which contains various common motor technical data. Repair quality standards and test standards, numerous repair examples for readers
1.Design speed: 250m/min.Width:2000mm
2.Memory of 999 orders,could change order automatically or manually but no need to stop the machine.
3.Quickly change order, within 3-8s. Application of two machines,could change order but no need to reduce the speed.
4.Could follow the line`s speed automatically,make sure that be synchronize with the corrugated line.Could connect with production management system,with high compatibility.
5.Use higher quality imported industry computer and PLC to constitute Hypernym-hyponym computer controlling system.
6.There are three scorer types: convex-concave(single wall), convex-concave(double wall), and convex-flat,these three types could be alternated electrically. Scoring wheel`s deep or shallow could be controlled automatically by computer.With good line shape and easy to be bend.
7.Adopts thin type tungten steel alloy blade,sharp and long using life,more than 8 million meters.
8.Computer controlled auto grinding,manual grinding also could be applicable.Could grinding the blade when the machine is running,can increase efficiency.
9.Adopts imported synchronous belt device,with higher precision,long using life,and lower noise.
Scoring is electrical controlling,upper and down scorer could be adjusted at the same time,down scorer could individually fine tuning.
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