Troubleshoot general steps - to determine the point of failure

According to the failure phenomenon,combined with the principle of equipment and control characteristics analysis and judgment,determine the scope of the fault occurred in what,electrical fault or mechanical electrical motor failure,is a dc circuit or ac circuit,main circuit and control circuit or auxiliary circuit,power supply part or parameter adjustment www.facebook.com/guohong.trading is caused by the inappropriate,man-made or randomness and so on,gradually narrowing the scope of the fault,until find the point of failure.If lack of system of diagnosis information,you need the whole ac induction motor equipment maintenance personnel correctly or control system is divided into several pieces,then check the parts of the input and output is normal.When determining a certain part,and then to focus on the part of the internal problems,find out diesel generators prices the point of failure.Under the condition of ensure the safety of equipment,can pass some test method to determine the fault position.Electricity to test,for example,or to make a relay action,etc.,to find and determine fault location.

Ac voltage measurement

In order to grasp the change situation of IC ac signal,can be used with the dB jack multimeter ac electric motor 12v 500w voltage electrical motor 24v to approximate measure of IC.Detection multimeter under ac voltage blocking,pens and insert the dB jack;For no dB jack multimeter,need in pens and concatenated a 0.1 ~ 0.5 u F condenser.The method is suitable for the working frequency is low IC,such as television video amplifier stage,field scanning circuit,etc.Due to acmotortrading.blogspot.com the inherent frequency of the circuit,waveform is different,so the measured data is an approximation,for reference only.

The working principle of pump and fan - tubular fan

In recent years,thanks to the development of air conditioning technology requires a small volume,low noise,pressure head properly and easy to match the buildings on the installation of small fan.Tubular fan is wholesalemotor.blogspot.com to adapt to the requirements of the new fan.Tubular fan main features is as follows (figure 1,6):(1) are generally more vane impeller forward leaf type,but the two end face is closed.(2) the width of the impeller b without limit,when the width increasing.Flow also increases.(3) tubular fan don't like the centrifugal ac electric motor fan is on the chassis sides open axial airflow into the fan,but open chassis part directly radial flow into the fan.Air flow across the leaf twice.Adding some auxiliary fan in the impeller of the fixed guide vane,to improve the air condition.(4) on the performance,the efficiency of auxiliary fan is low,generally about 30% 50%.ac motor capacitor (5) the air inlet and outlet are rectangular,easy to match the building.diesel generators prices Tubular fan still exist many problems to be solved.Especially the geometric shape of each part has a significant effect on its performance.Imperfect structure and completely unable to work,but small turbine is steadily expanding the scope of application of the fan.

The application of squirrel-cage asynchronous motor soft starter - the traditional method for motor starting

Squirrel-cage motor direct total pressure of the large current when starting the motor stator coil and produce very big impact,rat cage bar damage caused squirrel-cage winding insulation and faults,cause 8500w gasoline generator motor failure; Large current will produce a lot of heat,winding insulation damage,reducing the life of the motor.Can be used to increase the power distribution capacity or limitation of motor starting current method to solve the above problems.If only increase the distribution capacity for starting motor,it is not economic.Therefore,usually equipped with limit starting device of generator generator set motor starting current.The commonly used methods are: 1) the stator cascade reactor or resistance starting.Stator reactance starting,reduces the starting current,but also reduces the starting voltage and starting torque is reduced more.Therefore,stator reactor step- down starting applies only to the electrical motor light load motor starting. 


2) ya a delta step-down starting.Ya a delta step-down starting is also applicable to the light load motor starting,and limited to the normal operation of delta connection of the motor.Louboutin leather plant low pressure air compressor motor is to use this way. 3) the autotransformer step-down starting.Using autotransformer step-down starting,compared with the direct starting,starting voltage reduced a lot (for the rated voltage of 1/4,1/7),and the starting torque to reduce more; And autotransformer is wholesalemotor.blogspot.com not allowed to frequent starting,which limits its wide use. 4) yanbian triangle step-down starting.Yanbian triangle is made after the starting of motor,tap can't change,limiting the application of yanbian triangle starting method.These belong to step decompression starter,start-up mode and obvious shortcomings,namely the secondary impact appeared in the process of starting current.

Ac voltage measurement

 In order to grasp the change situation of IC ac signal,can be used with the dB jack multimeter ac electric motor 12v 500w voltage electrical motor 24v to approximate measure of IC.Detection multimeter under ac voltage blocking,pens and insert the dB jack;For no dB jack multimeter,need in pens and concatenated a 0.1 ~ 0.5 u F condenser.The method is suitable for the working frequency is low IC,such as television video amplifier stage,field scanning circuit,etc.Due to acmotortrading.blogspot.com the inherent frequency of the circuit,waveform is different,so the measured data is an approximation,for reference only.

Pump and fan - jet pump working principle

 The high pressure working fluid 7,by the pressure vessel nozzle 6 to work,can become high-speed kinetic energy after the nozzle pressure,the liquid (or gas) to go outside of the nozzle. At this time due to the nozzle exit and the diffusion asynchronous motor by high-speed room 2 throat cause vacuum suction chamber 5,so that the suction fluid,eight continue to motor run capacitor come into and work fluid mixing,and then through the diffusion chamber would carry out pressure slightly elevated. Because of the working fluid continuous injection,suction chamber remain a vacuum,so being ac electric motor constantly suction and discharge fluid.Working fluid to high pressure steam,can also be used for high pressure water,the former is called steam jet pump,which is called the water jet ejector. This kind of pump in a refrigeration system is relatively rare.

Troubleshoot general steps - symptoms analysis

 Symptom analysis electric motors price is for all possible information about fault original state is collected and judgment process.Before the fault indications interference,for all the information should be carefully analyzed.The original information in general can be obtained from the following aspects:1.Ask for details of equipment failure phenomenon to operators.By asking for equipment use and situation before and after the change motor magnet process,damage or failure of information,also can learn some similar past failure phenomenon,reasons and have measures,etc.Operators may sometimes because of other reasons,not willing to or can't put all the plot clearly.Maintenance personnel should be analysis to distinguish ability and enough patience,to get the real original information as much as possible.2.Observe and preliminary examination.By watching heard touch,check whether such as cracking,noise,odors,overheating and other special phenomenon.

Observation of the equipment to conduct a comprehensive tend to get valuable clues.Work station of the content of the preliminary examination including detection device (light,display and alarm information,etc.),check the position of the switch,and operation control mechanism,adjusting device and the signal device,etc.3.Sure,in the absence of any dangerous electric test.Normally according to normal operating procedures www.facebook.com/dongfeng.motor shall require the operator to boot device.If the fault is not the whole machine of the electrical control system paralysis,can adopt the method of test run to start the equipment,help a comprehensive maintenance personnel for fault state of the original impression.Some electrical fault can be by hand,eye,nose,ear,use the means such as see hear touch,directly perceived failure equipment abnormal temperature rise,vibration,odor,noise,etc.,of the equipment fault can be located.The electrical motor 24v purpose of this phase is to collect the fault of the original information,so that to the current actual situation analysis,and to derive the most possible fault area of clues,check reference as the next step.But be careful not to sign according to the imprecise or not sufficient information to judge prematurely.