The analysis of the causes of leakage of transformer oil - packing quality

At the scene of the collapse of the transformer terminals can be electrical motor found at a time,leakage of oil terminal blocks most of fastening nut loose,install this doesn't mean that it electrical motor 24v did not tighten,with plane flange rubber gasket,for the first time after fastening tend to loose because of plastic deformation of the rubber gasket,need a second fastening.Transformer and our factory has been running for many years,there is no rubber gasket deformation problem,may explain why only is rubber gasket ageing lose elasticity,reducing the pressure on the surface of the flange connection.According to my years of experience in maintenance,air isolation rubber gasket to run more than ten years should not have what problem.Such as the transformer operation of our factory in nanjing,cichang has more than 20 years,did not find for porcelain set gasket electricalmotor1.blogspot.com aging oil leakage.Presumably liling porcelain production of transformer set gasket exist quality problems.

Rated power

Power rating is computer radiation eliminator continue to work to provide maximum power,unit permanent magnet motor in watts (W),or use the kilowatt (KW),for the unit 1 KW = 1000 watts.Computer radiation eliminator is working to replace the computer power cord,so asynchronous motor its rated power must meet the needs of computer,computer radiation eliminator is the most important parameters.Rated power and rated motor run capacitor voltage and working current has a very close relationship,in principle equal to rated voltage multiplied by the working current,so the computer radiation eliminator usually in the rated power of 1000 www.facebook.com/dongfeng.motor w to 2000 w.As well as working current,rated power is in the normal work of continuous can provide maximum power,rather than say work must have need of such power.Computer radiation eliminator power at work actually far less than this value,basically depends on the computer itself need power,the computer radiation eliminator consumes power is very small.

Voltage current transformer model meaning

Capacitive voltage transformer (CVT),in 1970 developed the domestic first 330 KVCVT,1980 and 1985,developed fan motor the first generation and second acmotortrading.blogspot.com generation KVCVT 500,1990 and 1995,developed the third and fourth generation KVCVT 500,more than 30 years has accumulated rich 12 volt electric motor experience in scientific research,development,design and production,in the domestic developed generation after generation of CVT new products,three phase induction motor giving impetus to the development of the domestic CVT.CVT's main features are: 1.High electric strength,insulation margin is large,reliable operation.2.Reliable damping ferroresonance.Successful adoption of the new group phase,with strict quality control,ensure that the factory's every piece of CVT are under any of the voltage from low to high effective damping various ferromagnetic resonance frequency.3.Good contact response characteristics.When the second time remaining after a short circuit voltage can fall below 5% in 20 ms,especially adapted to the fast relay protection.4.Has the power grid harmonic monitoring of patent technology.

Pump and fan - the other types of pump and fan

 Pump and fan is to use plus can denier permanent magnet motor conveying fluid fluid machinery.They are widely used in gas and heating and ventilation.According to the working principle of pump and fan,usually they can be classified as follows:Such as jet pump,jet pump and vortex pump motor run capacitor (scroll pump),vacuum pump,vacuum pump),etc.This introduction and discussion of pump and fan commonly used refrigeration electricalmotor1.blogspot.com professional theory,performance,operation,adjustment and selection methods of knowledge.Due to refrigeration professional pump commonly used is incompressible fluid as working object.And fan pressurization degree is motor magnet not high,usually only pa 9807 or below 1000 mmh2o),so this content according to the incompressible fluid is discussed.

Stator voltage regulation speed control method

When change mini electric motor of motor stator voltage,be able to get a different set of mechanical characteristic curve,to get different speed.Due to the torque of the motor and the voltage is proportional to square,thus maximum torque decreased a lot,the smaller range of speed regulation,and makes difficult to apply general generator stator squirrel-cage motor.In order to enlarge the speed range,regulating speed rotor resistance value should be adopted for the big cage motor,such as torque motor,USES for regulating wholesalemotor.blogspot.com speed or frequency on the wound rotor motor series resistor.

In order to expand the stable operation range,speed above 2:1 Settings when feedback control should be adopted to achieve automatic adjustment speed.Regulating speed control is a main device can provide voltage change of power supply,the current commonly used ways with saturable reactor in series voltage regulator,autotransformer and thyristor voltage regulation.Thyristor voltage regulation mode is the best.Regulating Dongfeng Electric speed control features:

regulating speed control circuit is simple,easy to realize automatic control; Voltage regulation in

the form of heat transfer differential power consumption in the rotor resistance,low

efficiency.Regulating speed generally applicable to the production machinery under 100 kw.

The application of hollow cup motor

As industrial technological progress,all kinds of mechanical and electrical equipment strict

technical conditions put forward higher and higher technical requirements of servo motor,at the same time,the application range of the hollow cup motor has been completely out of the limitations of high-end products,is rapidly expanding in the general civil scope of application of electric vehicle motor low-end products such as widely to improve the quality of products.According to the statistics,in the industrial developed countries already have more than 100 kinds of civilian products mature application of hollow cup motor.Application of hollow cup motor,from the military,high-tech fields in large industrial and civil field,after more than ten years to get rapid development,especially in the developed countries,has been involved in most industries and many products.1,take advantage of its high energy conversion efficiency of use;Using the linear operation characteristics,also used as a

tachogenerator;With reducer,can also be used as a torque motor need quick response servo

system.2,smooth driving element requires persistent drag wholesalemotor.blogspot.com products.Such as various types of portable instruments and meters,personal portable equipment,field instruments and equipment,electric vehicles,etc.,also a set of power supply,power supply time could be extended by more than double.3,all kinds of aircraft,including aviation,spaceflight,model aircraft,etc.Using hollow cup motor light weight,small size,the advantages of low energy consumption,can maximum limit reduce the weight of the aircraft.4,such as missile flight motor fan direction adjustment,fast high-magnification drive servo control,fast automatic focus,high sensitive records and testing equipment,industrial robots,bionic limbs,hollow cup motor function well satisfy its technical requirements.5,all kinds of civil electrical appliances,industrial products.Hollow cup motor as executive component is proposed,which can make the products improved,superior performance.