Stepping motor automatic half current circuit

 Stepper motor to reduce the fever, will www.dongfeng-motor.com reduce the copper loss and iron loss. motor parts Reducing the copper loss is reduced, resistance and current requirements in the selection as far as possible choose small resistance and the rated current of the motor, but this often conflict with the moment and the requirement of high speed. For selected motor, first of all, should make full use of the drive of automatic flow control function and offline function, automatic half flow automatically reduce current when motor is static, offline function is to cut off the output motor current; Second, subdivision driver due to the current waveform is close to sine, less harmonic, electric heating will be less. To reduce iron loss associated with motor drive voltage, high voltage driver motor will bring high speed characteristics of ascension, but also bring the increase of the heat. We should choose the appropriate drive voltage grade, recommend suite, give attention to two or morethings stationarity and fever, such as noise indicators. 


To minimize motor sends, need TB6560 TQ2 and TQ1 pin level when the motor work is set to the maximum output current, the motor current in half or less when not working, so called "automatic half flow circuit". After the maximum output current, are defined with the NFA, NFB via TQ2 and TQ1 set current ratio of the output, is set fan motor to 00, 01, 10 and 11, the output current is the maximum current respectively 100%, 75%, 50%, 25%. Change of motor drive current, will change the size of the motor output torque. Automatic half flow circuit design with repeatable triggered monostable circuit chip 74 ch123, with motor drive pulse CLK as monostable trigger circuit. Monostable circuit reverse pick TQ2 output pin, when the motor driven lamination pulse TQ2 has kept a low level, no drive pulse maintain a high level. In figure 2 circuits, TQ1 connect three jumper cap. Connect a jumper wire 1, TQ2, TQ1 as high or low level all the time, drive current switch in 25% ~ 100%; Jump line 2, TQ2 is always low, current switch in 50% ~ 100%; After jump line 3, the current switch in 25% ~ 75%. Can choose different jump line according to the needs of work drive current.

3 okw motor, 380 v voltage. The power factor is 0.2, could you tell me how to calculate the rated current?

 Rated current I = P30KW U0.38 KV / 1.732 * * 0.2 = 227.9081 A, but electric motor 12v 500w 30 kw motor power factor can't be so low ah, do you want to calculate no-load running current of motor. The question you ask is problematic. ac three phase motor 30 kw motor power factor should be above 0.75. If according to the capacity of current rating: I = P30KW U0.38 KV / 1.732 * * 0.75 = 60.7755 A. Teach you two formula, very useful: "capacity divided by the number of kv, dealer by coefficient of seventh. "A kw, two current" can estimate the rated current of three-phase motor. Low power factor, then the acmotor2.blogspot.com motor should be banned the example of the net. Line current of three-phase ac asynchronous motor I material 2 P, P - power, kw. I material 2 x 60 kw motor current 30 = 60 a.

Transformer fault analysis and processing - high voltage transformer common fault reason analysis

Due to manufacturing quality aspects of problems in oil storage tank,and sealed,leading to the insulation fault and could explode,in some oil storage on the ark cover plate thinner,poor welding,flange gasoline generator box along a thin,wide pitch and fine processing technology is not the faying surface rough inequality. In addition,if you use the sealant mat quality is bad,after long-term use of metamorphism and lose elasticity,even and crack,caused by leakage and be affected with damp be affected with damp.Moisture absorption device installation is unreasonable,if disrepair,silica gel,when humidity increase temperature mutations,moisture will enter the transformer,the insulation,water enters the body breakdown caused by water.Body design,selection of materials and processing technology,the existing problems,such as more than 110 kv voltage transformer,the enameled wire,some winding process is lax,deformation,coil turns overlapping,when winding motor run capacitor tightness is differ,or layer insulation thickness,could produce layer or interturn short-circuit cause transformer explosion.

Choose the material quality is bad,if 220 kv capacitor type current transformer structure,selection of cable if poor insulation performance is easy to cause trouble,and support such as voltage transformer insulation board selects absorbent material is big,and not through immersion oil processing,insulation performance is poor,also easy to cause breakdown caused by the fault.12v motor Voltage transformer body support plate quality bad,runtime craze,partial discharge and then extended to breakdown in pairs.Cascade type voltage transformer iron core structure has defects,the clamping screw have suspended potential or spiral Angle caused by partial discharge;With double core voltage transformer,such as the spacing between the two core is not enough,can also cause climb lightning collaterals cause faults in the operation.Transformer terminal derivation of the leakage of oil or leading-out terminal acmotortrading.blogspot.com board insulation fault may cause failure.Transformer fault in addition to manufacturing,material selection,design and test report lax wait for a reason,and operation maintenance is not timely,also found that the problem could not handle in time,have a direct relationship and disrepair.

What is the meaning of power rating?The input power is what mean?

Would be rated power 100 w, 100 w?electric vehicle motor The input power of 350 w is must be 350 w?The input power, is the ac electric motor electric power consumed. Rated power generally refers to the effective power of the electrical appliances can be continuous output;Which is under normal working conditions electricalmotor1.blogspot.com the maximum power of can continue to work.

STB high performance permanent magnet synchronous servo motor

(H) series product categories:low speed permanent magnet generator numerical control system,the feature-motor and servo motor drive-product parameters:Product brand:other product overview:compared with induction servo motor,synchronous servo motor has higher dynamic performance,more energy-efficient,and better Low speed torque characteristic and control characteristic,guides the technological change in the field of industrial machine,in order to comply with the demand of the market,fu tian motor in full Research of the customer's requirements,analysis,product development trends,and fully study the international first-class product technology,on the basis of developed STB and STH series big moment Servo synchronous motor series,production enterprises:Shanghai fu tian motor manufacturing co.,LTD.Product advantage:with the technology of industrial machine from all walks of life Upgrading,more and electric motor cooling fan more ordered its main power motor satisfy the premise of powerful driving moment,but also more rapid dynamic response ability and high precision .

Ability,to improve the automation of machine function,improve the efficiency and capacity of the machine work,and to promote the quality of the product,in this case,a For the combination of torque and servo power requirements type wholesalemotor.blogspot.com servo motors are produced.Spatially-integrated SVS,STB (H) series,motor is suitable for such a demand of electricity Machine type products,under the rated speed,synchronous series products compared to the STB (H) series of products with tis servo characteristics,but in the weak magnetic speed Period,the characteristics of the STB (H) series of products is superior to synchronous motor series.Compared with induction servo motor,synchronous servo motor has higher dynamic performance,More energy-efficient and more excellent low-speed torque characteristic and control characteristic,is to guide the technological change in the field of industrial machine,in order to comply with the demand of the market,Fu tian motor in investigating the development trend of customer requirements,analysis of products,and fully study the international first-class product technology,on the basis of developed STB and STH Series of large torque servo synchronous motor series,emphasize on designed high reliability and high performance.

How to do motor no-load test?

Before the test,inspection on motor,no problem,pass into the three-phase power supply,make the motor without pulling the load idling.And then to check operation of the sound,the workings of the bearing and three phase current,generally the large capacity of high wholesalemotor.blogspot.com speed motor no- load current 20 to 35% of the rated current for its small capacity no-load current of low speed motor for 35-50% electric motors 12 volt of the rated current is not idle current is too large and too small and three-phase equilibrium and no-load test time should not be less than 1 hour,should also measure the motor temperature rise at the same time,the temperature rise according to single phase asynchronous motorthe grades of insulation shall not gasoline generator exceed the allowable limit.

The basic working principle of permanent magnet synchronous motor

The principle of permanent magnet synchronous motor as follows zhongtong into three phase current,the stator winding of the motor after the current will be formed in the stator winding of the motor rotating magnetic field,due to install the permanent magnets in the rotor,Magnetic pole of permanent magnet is fixed,according to the principle of magnetic pole of same-sex attraction heterosexual reactive,in the stator rotating permanent magnet generator 5kwmagnetic field generated by the drives the rotor rotate,eventually achieve the rotation of the rotor speed and stator equals the speed of rotating magnetic pole,so Can the starting process of permanent magnet synchronous motor as the asynchronous start-up phase and phase of pull in synchronization.In asynchronous start study phase,the speed of the three phase induction motor motor is gradually increased from scratch,the main cause of the appeal is its turn in asynchronous Moment,permanent magnet generator brake torque,torque of the magnetic resistance torque and single shaft by a series of factors such as asymmetry of rotor magnetic circuit and led caused under the function,so in the process speed oscillation is rising.

In the process of starting,torque,Asynchronous torque is the driving motor is only with this torque can be accelerated,most other torque is given priority to with brake properties.In motor increased from zero to nearly the speed of the rotating speed of stator magnetic field,under the influence of pulse vibration torque of permanent magnet Permanent magnet synchronous motor speed is likely to exceed the synchronous speed,and the basic working principle of single phase capacitor start induction motor permanent magnet synchronous motor The principle of permanent magnet synchronous motor as follows zhongtong into three phase current,the stator winding of the motor after the current will be formed in the stator winding of the motor rotating magnetic field,due to install the permanent magnets in the rotor,Magnetic pole of permanent magnet is fixed,according to the principle of magnetic pole of same-sex attraction heterosexual reactive,in the stator rotating magnetic field generated by the drives the rotor rotate,eventually achieve the rotation of the rotor speed and stator equals the speed of rotating magnetic pole,so Can the starting process of permanent magnet synchronous motor as the asynchronous start-up phase and phase of pull in synchronization.

In asynchronous start study phase,the speed of the motor is gradually increased from scratch,the main cause of the appeal is its turn in asynchronous Moment,permanent magnet generator brake torque,torque of the magnetic resistance torque and single shaft by a series of factors such as asymmetry of rotor magnetic circuit and led caused under the function,so in the process speed oscillation is rising.In the process of starting,torque,Asynchronous torque is the driving motor is only with this torque can be accelerated,most other torque is given priority to with brake properties.In motor increased from zero to nearly the speed of the rotating speed www.dongfeng-motor.com of stator magnetic field,under the influence of pulse vibration torque of permanent magnet Permanent magnet synchronous motor speed is likely to exceed the synchronous speed,the speed overshoot phenomenon occurs.But after a period of time after speed oscillation,finally in synchronous torque under the action of pull in sync.Speed overshoot phenomenon.But after a period of time after speed oscillation,finally in synchronous torque under the action of pull in sync.

Stanley portable power station

A lot of size is smaller than air compressor power station,there is only one trolley so big,can drive the efficient tool.For example,we a GT18 hydraulic power station to drive samples of all the tools,from the 90 # hydraulic drill picks wholesalemotor.blogspot.com to small. Our hydraulic power station using the latest technology of the engine manufacturer.Use air-cooled engine,high combustion efficiency,light weight,strong and durable,its produce power to drive the cause of most of our tools,and acmotortrading.blogspot.com engine load.Hydraulic power station look for air and also or internal combustion is a tool perkins diesel generator set has the following characteristics. 1.Diversity: we have more than 50 types of tools you can use this power station 2.perkins diesel generator set Air cooling: not freeze in winter 3.High efficiency: 1 disappeared 4 litres of fuel consumption 4.Low noise 5.Light weight: 150 kg 6.Size: can be put into small truck or train 7.Portability: can work in the field to the mobile trolley 8.Convenient maintenance: can the dealer maintenance engine

The diagram of three-phase asynchronous motor

In the industrial field, three-phase asynchronous motor because of its easy to use, high efficiency, was welcomed by many factories. A lot of people for this device, also began to have a preliminary understanding. And this kind of three-phase asynchronous motor, but also the emergence of a three-phase asynchronous motor diagram. A lot of people don't know such figure how what kind of role, also some people don't understand. Really want to say to the role of, or more. www.facebook.com/dongfeng.motor First: to know the motor vehicle spare parts working principle of three-phase asynchronous motor The three-phase asynchronous motor, chart for some people who do not understand, is very confused. In fact, as long as people will look at the picture, through this picture, can know what is the working principle of three-phase asynchronous motor. And through such a working principle, can also learn about the three phase asynchronous motor is used in what areas. The second: know how to work through the three-phase asynchronous motor Through such a figure, also can let people know how to let the three-phase asynchronous motor, according to their own needs. So that the three-phase asynchronous motor can also according to their needs, to work and production. Third: learn how to asynchronous motor for three-phase asynchronous motor operation Most people for three-phase asynchronous motor is not very familiar with, although know the principle, but still don't know how to operate. However, map can help people to solve this problem, it can let people know that if the operation for three-phase asynchronous motor, so as to avoid because of not operating and the embarrassment. This is the diagram of three-phase asynchronous motor. In addition, such as three phase asynchronous motor wiring diagram, can bring people a lot of useful information, help people better understand the operation of the three-phase asynchronous motor, etc.