Magnetic transformer may be thicker, heavier and more inefficient

For the next generation of portable fluorescent display enclosure and become thinner , therefore , creates a demand for thin CCFL power supply . Thanks to the development of magnetic ceramic piezoelectric transformers and transformer , we can create a more efficient , smaller backlight converter. Select the transformer depends on the cost , size and efficiency , and several other factors . For example , at a given power level lower than the piezoelectric transformer , the transformer may be magnetic thicker , heavier and less efficient , but it also has a greater load range and a lower cost advantage . For the PZT transformer , the operation of the sine of its inherent characteristics . In addition, it has a high excitation voltage , non-flammable and non- electromagnetic noise , etc. . A transformer for example 3-4W laptop . About the high-frequency magnetic transformer transformer works by a  mcb circuit breaker  core and a plurality of coils wound on the composition . Transitions occur between the energy flux and the magnetic core. This energy exchange is a function of current and voltage of the integral : Energy = ∫ I Vdt = ∫ H dB change in flux density in the core can be used and the field intensity is expressed ; current in the coil can also be used , to express the change of voltage and time . The magnetic flux density and V - second proportional and  power transformers  to the number of turns of the coil and the core cross-sectional area . Calculated according to Faraday 's law : current and number of turns is proportional to the intensity and the field , and inversely proportional to the length of the coil . According to Ampere 's law , it can be expressed as : The relationship between the flux density and field strength determined by the magnetic permeability of the core ;

Street iron yoke plate between prolapse and changed the working air gap

Main contactor air cylinder and electric control valve leakage that insufficient air pressure, contactors slow movement; also electrically controlled contactor air cylinder and poor  Voltage stabilizer . Li ti excitation contactor iron working air gap between the core is too large: one is the field contactor coil and yoke gasket between the core mounting bolts loose or loose; second is the street between the iron yoke plate  mcb circuit breaker  and changed the working air gap. Activities are not flexible and exciter armature contactor moving contact arc hood connected with day wear caused by excitation contactor guilty cards. Analysis from the field  power transformers  part of the circuit can be seen only switched on only after all the action, if the three of them turned slowly interlocking coil is energized will cause lag.

Maintenance of high voltage electrical switch gradually find methods and means stability

High-voltage electrical switch in the power system as a whole, an important part of our country safe and stable operation of power systems play an important and decisive role, but also directly affect the electrical safety of users. In order to maintain the stability of  mcb circuit breaker , people also began to attach importance to the stability of high-voltage electrical switch problem. Therefore, the power system workers also began by analyzing the stability of high-voltage electrical switchgear factors to gradually find maintaining the stability of high-voltage electrical  power transformers  and methods. Stability of high-voltage electrical switch basic status of high-voltage electrical switch of the power system as an important part, with the use of a wide range and number of features, its electric meter can give the entire power system operation caused by the security and stability the most direct impact of the development of high-voltage electrical switch China's electric power system operation and quality are closely related.

High voltage switching device is a transmission and distribution systems from the control and protection of the most important electrical equipment

National Grid to increase investment by the market economy, many factories have launched production of switching equipment. Where high pressure, high-voltage switchgear is transmission and distribution systems from the control and protection of the most important electrical equipment, is supported by the state major machinery and  mcb circuit breaker , revitalize national industry shoulder the historic mission. West Electric Group, Xi'an Switch Factory million volt level product assembly project for the steel construction. The project has outstanding characteristics, concentrated light steel, heavy steel lattice, grid, color plate roofing,  electric transformer , etc., due to process causes more building partitions, design and construction of complex, changing shape. Project Overview West Electric Group Western Cape million volt level product assembly project, with a total construction area of ​​20000m2, due to the production process is divided into eight  power transformers  segmentation, the main plant with a steel form. Buildings highest elevation 41m, maximum span of 60m. The main structure in the form of steel plants, including H light steel, lattice steel columns, grid and so on.

Flameproof enclosure by a lever on the brass sleeve requires co-ordinated with copper sleeve

Button ring groove on the rod-proof products, many manufacturers now shell and front cover has a variety of button, the button bar is often used form of ring, ring effect is that once the explosion occurred inside the enclosure, the pressure acting on the button bar ends, the ring can be introduced to prevent the button rod outer shell, thus avoiding the formation of the button bar missing booster channels. It  electric meter , taken from a mechanical manual investigation groove depth is small, if roots unclear bottom pressure in the circular ring will follow the axial sliding movement relative to the button bar, the loss of a ring effect.  power transformers , the design of the groove depth should be appropriate bigger, processing bottom should pay attention to clean the root, or simply use the pin structure is more reliable. About flameproof enclosure by a lever on the brass  Voltage stabilizer  co-ordinated with copper sleeve, copper sleeve is an interference fit with the housing, and the joystick is clearance fit. Copper sets the amount of interference should not be too large, should be controlled not more than 0.05mm, copper sleeve wall thickness should not be less than 2.5mm.

Correctly distinguish inrush and internal fault has been the focus of transformer protection

Power transformer is extremely important power system equipment, transformer differential protection is the main protection. Load switching or external short circuit fault clearing voltage generated when a  power transformers  current recovery, the size of a few comparable internal fault currents. Can correctly distinguish inrush and  air circuit breaker  transformer protection has been the focus of a variety of magnetizing inrush current  Electric energy meter  method largely based on Kirchhoff's law, there is in principle a defect; several differential protection new theories, new technology also needs to be further improved in practice. With the increasing size of the power system, load tap more extensive application, which also produced a lot of problems related to.

Multifunction key technology research Bolter Bolter is a new functional and structural design

The hydraulic impact rotary drilling and other characteristics, the subject has become a national infrastructure development are urgently needed. In response to this situation,  power transformers  of new full hydraulic multi-bolt rig, this thesis is derived from the subject of the research project, I was responsible for one of the research projects. Multifunctional  Voltage stabilizer  is the key technology features new Bolter and structural design, the whole machine's hydraulic system design and impact rotary drilling of oil in the hydraulic system simulation.

As a suburban or rural substation overhead line switching control and protection

Easy to install and operate the pole circuit breaker. Mainly for urban overhead distribution lines segmented interval switching control and protection. Suburban or rural areas can also be used as an overhead line substation control and protection switching.  Voltage stabilizer  to oil-immersed  electric meter  breaking ability, oil inflammable, causing secondary disasters tend to be eliminated. After the 1980s, the use of SF6  power transformers  device with excellent performance, since the 1990s, began to adopt further operating power, long life of the vacuum interrupter. Typical pole breaker main technical parameters: Rated voltage 12kV, rated current 400,630 A, rated breaking current 6.3.

Hosted within the specified time, closing and breaking currents under abnormal

Can carry, closing and breaking the normal operation of the line currents can also be carried within the stipulated time, closing and breaking currents under abnormal (such as short-circuit current) switching equipment, power system protection and operation of the major electrical devices. Circuit-breaker many different types, but  power transformers  circuit are electrically conductive, insulating support member, and the interrupter  electric meter  composed of several parts. Basic structure include: ① a conductive main circuit, through the movable contact,  Voltage stabilizer  of the contacts on the circuit implementation and isolation; ② interrupter, the circuit breaking arc generated during the sealed chamber under a high pressure in rapidly within tens of milliseconds off, cut off the circuit;

Disk drive and a floppy disk drive can be divided into hard disk drive

Read and write data on the disk of the device. Disk drive is a head, electrical, mechanical means and the write circuit, etc., which is an important part of the disk file. Since the  electric transformer  and hard of points, so the disk drive and the floppy disk drive is divided into hard disk drive. The microcomputer system, the floppy disk drive with a floppy disk can be separated, the drive permanently  power transformers  the computer chassis,  Air circuit breaker  and write data information is re-inserted into the floppy disk; the hard disk drive of the same hard disk together with the seal in a metal box and fixed on the computer chassis.

In order to evaluate the use of high-temperature logging instrument reservoir, the demand for high-temperature circuit has been very urgent

Equipped with the first commercial application of the micro-circuit logging prototype able to 527 "F temperature. Conventional logging tools because of their electronic circuit conditions at  power transformers above 356OF can not work reliably, so the temperature of up to 52" F when the use of these instruments will be greatly limited. In order to evaluate the use of high-temperature logging instrument reservoir, the demand for high-temperature circuit has been very urgent. Reliable air circuit breaker  reservoir lithology and fluid properties, in order to determine the geothermal potential production of oil and gas reservoirs in the final. Logging can also simulate reservoir, design completion programs and production  electri cenergy meter  of groundwater temperature and chemical contamination, such as providing the necessary information. This new electronic apparatus using a thick film circuit, this circuit is to special printing film resistors, conductors and dielectric inks printed on the alumina layer and made of. After one thousand ink drying, the semiconductor increases, the circuit will be sealed.

Microcircuits more susceptible East Koshigaya electromagnetic pulse damage

As microcircuits more susceptible East Koshigaya electromagnetic pulse damage, the military authorities are implementing a unified cI protection standards. Officials from the Department of Defense has been recognized in the early 1960s to the factory MP effect - a potentially devastating nuclear explosions product. In the 1980s, the Defense Department to develop a command, control, communication and intelligent  power transformers  EMP protection guidelines. Recently, the Department of Defense and the military departments to further improve instruction more rigorous, more uniform standards to increase the deterrent against EMP. One located in Kete Lan Air Force Base (NM) of the * resuie EMP M device emulator is the largest and most  electri cenergy meter . Shown preparing Bu Wei bomber * MP shielding tests. The entire structure from the ground about 12 storeys high, all from the head and fiberglass. Both aircraft were tested subject to 5 million volts occur alum stretched pulse generator simulation field effect. The pulse generator to the test bench energy is applied around the antenna. Detonated a nuclear device, will be released in two areas powerful electromagnetic energy. In the source region (closest to the explosion point) record field strength up to 100by plus.

As an important branch of biosensors, electrochemical biosensor has some significant advantages

Biosensor is an emerging discipline bioelectronics research areas is a matter of biology, chemistry, materials, physics, medicine, and nanotechnology, microelectronics, information technology and other technology, including multi-disciplinary  power transformers  areas. Whether the mechanism of biological electron systems research, or development of practical  mcb circuit breaker , biosensors have inspired widespread national researchers and lasting interest. As an important branch of biosensors,  Voltage stabilizer  biosensor has some significant advantages, such as direct access to biological molecule itself or the electronic behavior of the reaction system, easy and electronic technology combined with the development of small analysis and detection system, which showed a more predictable application prospects.

The introduction of nano-technology, research and development of biological sensors to a more advanced stage, the performance is greatly improved in terms of performance

Biosensor is a typical multidisciplinary product is to analyze the important areas of biotechnology , after 30 years of development, has become a matter of wide-ranging, multi-disciplinary and cross- intervention , full of innovation and dynamic field . Electrochemical biosensor research content is very rich, has been in a leading position in biosensors to obtain a large number of research results, and has been widely applied. The introduction of nano-technology , research and development of  mcb circuit breaker  to a more advanced stage , and in the performance greatly improved. Nanomaterials effect brought large surface area , good chemical stability and biocompatibility , high adsorption capacity and other characteristics can  power transformers  the biological sensing element of the fixed and signal amplification. In this thesis, starting from the assembly of ordered nano system , using the template method and the Seed Law , building excellent new  electri cenergy meter interface , in order to improve the efficiency of biological molecules fixed , orderly orientation and maintain good biological activity , while providing good electron transfer . Biosensor developed simple preparation method has excellent performance, good reliability , the advantages of easy regeneration .

Different support engineering should choose different types of bolt rig

Bolting Roof Bolter is the key equipment of construction, affecting their quality support and supporting the pace. Different support engineering should choose different types of bolt rig, bolt rig currently made ​​form of a single, mostly split, torque is small, the body bulky and inconvenient, and foreign imports, although Roofbolter  power transformers  and performance , but the price is expensive. With electric hydraulic technology in the field of  Voltage stabilizer  machinery applications, research a new multi-purpose hydraulic bolt rig, able to adapt to a variety of geotechnical engineering construction needs anchoring, with full hydraulic crawler, high torque.

Maximum output power distribution transformer, the starting period of time, the load torque becomes smaller

For pumping the load carried by the distribution transformer, the maximum load torque at the start, the maximum output power  Voltage stabilizer transformer, the starting period of time, the load torque becomes smaller, the output power distribution  mcb circuit breaker  is greatly reduced. Therefore, in order to meet the requirements of pumping starter, left a large distribution transformer capacity margin. The transformer load is low rate of long-term working status, resulting in a waste of  power transformers capacity and active and reactive power losses, reducing the efficiency of the transformer, increasing the network loss. In order to reduce a pumping loss of power distribution transformers, it is necessary to use a start of pumping with a large capacity, in the normal operation pumping unit has a small capacity, the capacity to carry out the tone volume adjustment transformer.

Transformer manufacturer should find ways to reduce the dielectric strength is not the case

Kok, transformer insulation structure as an integral part of the winding end play to improve the distribution of electric field strength of the insulating effect, the stability of the technical performance of the system to ensure the reliability of the insulating  mcb circuit breaker . Electric transformer ends complicated and uneven distribution transformer manufacturer ways without lowering the dielectric strength should be the case, as far as possible to reduce the distance the end of the insulation, lower manufacturing costs, forming angle ring (hereinafter referred uniform is the angular ring) the emergence of precisely achieve this functionality. Kok raw material selection, processing, production and  power transformers are affected Kok insulation performance, the technical parameters of the important factors that become critical to ensure the safe operation of the transformer, so the ring in the corner to take the whole manufacturing process quality control measures to ensure that products quality defect. Supporting ring is mounted using a transformer winding end portion is uneven field, improve its insulation strength is the main way to improve field conditions.

Power transformer malfunction and have hidden faults

Summed power transformer malfunction and have hidden faults is demonstrated when various anomalies, for the study of power transformer fault location method provides practical basis. Analysis of power transformer fault detection technology, to  air circuit breaker  the power transformer internal fault detection and effective way. The use of fault tree analysis techniques (FTA) to build a power transformer  power transformers  fault classification tree model, will be introduced into electric power transformer fault localization studies. Study the characteristics of ant colony algorithm, principles, algorithms and implementation process model. Pheromone ant colony algorithm, the information heuristic function factor, the number of ants, ant colony algorithm expectations inspired performance factors on the impact of simulation studies.

Long period of low rate of transformer load loss caused by working status

For pumping the load carried by the distribution transformer, the maximum load torque at the start, the maximum output power distribution transformer, the starting period of time, the load torque becomes smaller, the output power distribution transformer is greatly reduced. Therefore, in order to meet the requirements of pumping starter, left a large distribution transformer capacity margin. The transformer load is low rate of long-term working status, resulting in a waste of  air circuit breaker and active and reactive power losses, reducing the efficiency of the transformer, increasing the network loss. In order to reduce a pumping loss of power distribution transformers, it is necessary to use a start of pumping with a  power transformers , in the normal operation pumping unit has a small capacity, the capacity to carry out the tone volume adjustment transformer. The project studied load transfer capacity of the transformer principle is the use of  Electric transformer  capacity and loss of the relationship between the transformer losses and the relationship between the running costs, from the "road" point of view, the use of the time-domain equivalent sine wave the equivalent circuit method and frequency-domain equivalent circuit combination form of time domain - frequency domain method is applied to the transformer characteristics of deduced load transfer capacity of the transformer magnetic circuit model and the model.

Modest changes in operating voltage, so the loss can be considered as a fixed value

Transformer loss is a load loss (also called fixed losses) and the load loss (also called change loss) of two parts. No-load loss and operating voltage proportional to the square, the modest changes in the operating voltage, so the loss can be  air circuit breaker  as a fixed value, so that the fixed losses; load carried by the transformer loss is proportional to the square of the actual load, due to the general use  power transformers  load is constantly changing, so called variable losses. Comprehensive loss of the transformer may be the capacity of the transformer, voltage transformer load rate, load current, impedance voltage, power factor and the use of time and other parameters, obtained by calculation.