Brushless dc servo motor characteristics

Y2 series high power China ac motor

Specifications
1. effiency: IE2 and IE1 
2. 20 years manufacturing experience 
3. 12 months guarantee 

4. low noise and vibtration 
Moment of inertia of small, low starting voltage and no-load current; Contact the reversing system, generator greatly improve the motor speed, maximum speed up to 100 RPM, 100; Brushless servo control in the implementation of the acmotor2.blogspot.com servo motor, squirrel cage induction motor without encoder also can realize single phase induction motor the control of speed, position, torque, etc; ac motors three phase induction motor generator There is 3 phase induction motor no brush wear condition, in addition to high speed, also has a long service life, low noise, diesel generator set no electromagnetic ac motors interference, etc.

How much is the no-load current of asynchronous motor?

motor Lamination ac motor blender parts 
Specifications
1. Lamination of electric motor 
2. IP54 class F 
3. 100% copper 
4. silicon steel stamping 

5. stunning performance 
Formula is the scene quickly calculate motor no-load current of specific numerical formula, it is a lot of the test data. It is in line AC synchronous generator with "the no-load current of the motor is the 1/3 of its rated current". At the same time it is in line rotor and stator with practice experience: "the no-load current of the motor, shall not exceed the capacity of the kw number can be used for" the principle of (after repair of old, small capacity motor). Formula "capacity by about eighty percent for" refers to the general motor no-load current value is about 0.8 times the number of nominal capacity kw motor. No-load current of medium-sized, 4 or 6 pole motor, is the number of motor capacity kw 0.8 times; New series, large capacity, small number of level 2 of the motor, the no-load current calculation according to the number of 3 phase induction motor "xinda sixty percent less"; To the old, old series, smaller volume, the number of large more than 8 pole motor, the no-load current, calculated on "is a small number of very many kilowatts", namely the no-load current value kw number approximately equal capacity, but is generally less than kilowatts.

How much is the no-load current of asynchronous motor?

electric motor stator rotor lamination motor parts 

Specifications
1. Lamination of electric motor 
2. IP54 class F 
3. 100% copper 
4. silicon steel stamping 

5.stunning performance 
Formula is the scene quickly calculate motor no-load current of specific numerical formula, it is a lot of ac electric motor the test data. It is in line with "the no-load current of the motor is the 1/3 of its rated current". At the same time it is in line with practice experience: "the no-load current of the motor, shall not exceed the capacity of the kw number can be used for" the principle of (after repair of old, small capacity motor). Formula "capacity by about eighty percent for" refers to the general motor no-load current value is about 0.8 times the number of nominal capacity kw electric motor low rpm motor. No-load current of medium-sized, 4 or 6 pole motor, is the number of motor capacity kw 0.8 times; New series, large capacity, small number of level 2 of the motor, the no-load current calculation according motor electric to the number of "xinda sixty percent less"; To the old, old series, smaller volume, the number of large more than 8 pole motor, the no-load current, calculated on "is a small number of very many kilowatts", namely the no-load current value kw number approximately equal capacity, but is generally less than kilowatts.

IRMCF341 application on frequency conversion electrical appliances

 IRMCF341 application on frequency conversion electrical appliances, mainly aim at high functionality and save electricity. For example, requires higher than that of high speed, good control performance and www.facebook.com/dongfeng.motor small size light weight, large capacity, high comfort, long life, safe and reliable, mute, save electricity, etc. 341 is mainly used in permanent magnet synchronous motor, ac permanent magnet synchronous motor is a kind of can directly start up in the 50 hz three-phase alternating current environment of electric motor, its operation mode is: start asynchronous, synchronous operation. 

Ac permanent magnet synchronous generator set spare parts motor is rare earth permanent magnet materials to replace traditional electrical excitation and made of high efficiency and energy saving motor, it not only has general and permanent magnet motor has simple structure, reliable operation, the advantages of small fever, but also has small volume, light weight, low loss and high efficiency of marked characteristics, can realize the traditional electro-magnetic motor is 3 phase induction motor difficult to achieve high performance. Plus 341 based on FOC () field oriented vector frequency conversion control, sine wave driving mode for 180 degrees, more make it fully play at the same time, the performance of 341 USES electric resistance current sampling refactoring techniques, save the cost and single resistance current sampling reconstruction technology refers to the current 341 use current PWM corresponding state, use appropriate delay time (avoid current oscillation) can collect the real bus current, will to many times current restructuring in the PWM timing can be three phase current.

Three-phase no-load current of 2.5 0.75 KW motor,what reason be

Two 0.75 KW..Grade 4...380 v...The motor..No-load current is between 2.3 to 2.6...Work environment textile factory..'a lot...Rated current of the motor is only 2.2...Normal no-load current is around 1.6..Time machine completely under ac electric motor the condition of no load over current...Due to the current big.So high temperature sharply born..Will soon..Overheating damage..Do not say the reason...thank you Problem complement: I thank two answer first..Disease,and together,the two are not normal before..In a few years later.You'll find the bad one current is increased.[.Repair of the motor are friends.Eliminate offline ribbon..] ...Until now,with or without load..Motor current wholesalemotor.blogspot.com is bigger...Last year when the motor current in 2.0 A..Now 2.4-2.5 A...Motor shaft sleeve inside and outside in good condition...Have not completed...Don't go...Only electricity pilot time to run the old hot..Often the temperature in the 60-80 degrees...Wiring is right...Are the normal installation... 


There is a reason,is you pick the wrong wiring.380 v y connection.You make into 380 v delta connection.So,motor heat quickly.This is one magnetic generator of them.In addition,the machine is idle for a long time,must have certain load.If it is in use for a period of time after the scenario (excluding intervention had gone wrong),should be the result of mechanical failure.1 bearing damage increase torque resistance.Run 2 bearing outer ring,which leads to the bearing wear gaps (cover),the rotor eccentricity running and friction with the stator (boring),increase the electric motor 12v 500w torque resistance.What type of your motor,then measure the core size,what are you friends with line,around a few laps? I help you check it.Is estimated to be between winding insulation damage,it is recommended that you access the winding.

More than 110 kv transformer fault processing method

110 kv and above defective transformer.Treatment methods mainly include core inspection,repair,replace the seal leakage,oil change,vacuum drying,structure improvement,etc.For body slightly and can only deal with at the scene of be affected with damp be affected with damp,generally USES the vacuum hot oil circulation processing,after the hot oil into electrical motor the transformer,heat insulation,its internal moisture will evaporate,and filter oil machine from transformer top discharge,through continuous loop to achieve the purpose of drying. Using vacuum drying process be affected with www.facebook.com/guohong.trading damp be affected with damp,body,vacuum to remain above 750 MMHG column,after the body into the chamber,from low to high temperature to increase slowly.


When temperature 40 ℃ drying 48 h,48 h,to 60 ℃ drying to 75 ℃ in 48 h,finally to 95 ℃,the insulation resistance should detect every hour,when its value in 6 ~ 8 h remain unchanged or changed little,the vacuum drying.Practice has proved that the chamber upper and lower temperature regulation in 10 ℃,the best drying effect,should pay attention to is asynchronous motor in the process of drying to prevent seal heat aging,to them,and put an end and the secondary outlet end of the small porcelain set loose.On the oil storage tank sealing and sealing capsule quality is poorer,can be equipped with corrugated expansion method is used to change the sealing performance; To secondary board be affected with damp be generator generator set affected with damp in the tg of the delta slants big,can replace the original secondary wiring board,change the way to solve small secondary outlet casing.

Single polar stepper motor step way

Single polar stepper motor can use three step method: single and double taps,half way.Single shot every time step approach refers to only give a winding electricity,as a result,the rotor rotation,and movement to the ac electric motor permanent magnet rotor winding with opposite polarity alignment position.Double beat way to two winding electricalmotor1.blogspot.com electricity at the same time,thus lead to the rotor rotation,and arrive in two permanent magnet electric winding the middle point of balance.Double shot method has the advantage of get 41.4% more than single permanent magnet generators for sale racket can output torque,but the price is twice cost in energy,because it has two phase winding electricity at the same time.Finally,make the way to work,let two winding alternately in electricity power with a single winding way.Half way of the output torque is smaller than double film method,with the design 3 phase motor is different,between 15% - 30% of change,but it can get double way clap twice stepper resolution steps (twice a week).Given in table 1 and table 3 under the three step way winding process of electricity.To make a stepper motor reversal reverse can just put the electricity process.

After motor starting speed is lower than the rated speed:

If several motor also appear such problems tend to power grid voltage is too low.If an electric motor parts electric motor starting a buzz and some vibration,to check whether the stator winding is a power,whether can measure three phase current balance and a buzz vibration check whether the three-phase voltage is too low,but not when no-load motor speed is normal,and the permanent magnet motors for saleloaded speed down.Check the steps: First will start motor racing,such as rotating speed is normal,can clean the motor with light load,such as low speed,load mechanical parts have cut living phenomenon,if no fault in the mechanical parts,motor speed not reduce,can make the motor in the rated load within the scope of operation,if the motor speed dropped,give a person a kind of not move feeling,it is proved that motor has a fault,the cause of this failure is that the extended delta connection of single phase capacitor start induction motor motor into a star,squirrel www.facebook.com/guohong.trading cage rotor broken bar,if it's just around the motor,is likely to be a very like a phase.

The characteristics of variable frequency motor

1,the electromagnetic design For ordinary asynchronous motor,and the design main consideration of the performance parameter is the overload capacity,starting performance,efficiency and power factor. And frequency conversion motor,because of the critical slip inverse ratio at power frequency,you can directly start when critical slip is close to 1,therefore,overload capacity and startup performance is not need to think too much,and to solve the key problem is how to improve the ability to adapt the motor of the non sine wave power. Generally as follows: 1) as far as possible,the reduction of the stator and rotor resistance. Reduce the stator resistance can reduce the fundamental wave copper consumption,to compensate for wholesalemotor.blogspot.com higher harmonic caused by copper consumption increase 2) to suppress the higher harmonic current,should be appropriate to increase the inductance of the motor. But rotor slot leakage resistance is larger the skin effect is also big,higher harmonic copper loss also increased. Therefore,the size of the leakage reactance of the motor should give attention to two or morethings arrives the rationality of the impedance matching within the whole speed range. 3) the main magnetic circuit of frequency conversion motor generally designed to unsaturated state,one is to consider will deepen higher harmonic magnetic circuit saturation.

2 it is to consider at low frequency,in order to improve the output torque and appropriate to increase the output voltage of inverter. 2,the structure design Structure design,main is also considering the non-sinusoidal power characteristics of variable frequency motor insulation structure,the influence of vibration and noise cooling mode,generally pay attention to the following questions: 1) the insulation class,generally for perkins diesel generator set F or higher,strengthen the insulation and line turn insulation strength,especially want to consider the ability of impact resistance voltage insulation. 2) to the problem of vibration and noise of the motor,the motor should be fully considered component and overall rigidity,trying motor lamination to improve its natural frequency,in order to avoid and every force wave resonance phenomenon. 3) cooling method: generally adopts the forced ventilation cooling,namely USES the independent main motor cooling fan motor driver. 4) measures to prevent shaft current,the capacity of more than 160 kw motor bearing insulation measures should be adopted. Mainly produces magnetic circuit asymmetry,also can produce shaft current,while the rest of the high frequency component generated by the current role in combination,shaft current will increase greatly,which can lead to bearing damage,so often insulation measures. 5) www.facebook.com/guohong.trading to the constant power variable frequency motor,when the rotation speed of more than 3000 / min,high temperature resistant special grease should be adopted,to compensate for the temperature of the bearing