The selection of magnetic beads

1. The unit of magnetic beads is the ohm, rather than a hunter, pay special attention on this point. Because the fan motor unit of magnetic beads are according to it stator motor electric at a particular frequency impedance to nominal, the unit of impedance is the ohm. Magnetic beads on the DATASHEET will generally provide the generator set characteristics of frequency generator and impedance graph, generally it is a standard with 100 MHZ, such as 1000 r @ 100 MHZ, which means at the time of 100 MHZ frequency magnetic bead the impedance of the equivalent of 600 ohms. 2. induction motor prices The average filter is made up of lossless reactive element, its role in the line is to single phase ac motor stop band frequency reflected back generator to the source, so this kind of filter also called reflection filter. When reflection filter and signal source impedance mismatch, there will be a part of the energy is reflected back Water pump to the source, causing interference level enhancement. To solve the problems, can be used in filter into online ferrite auto spare parts beads or three-phase asynchronous motor gost magnetic beads, use zi rings or magnetic beads on high frequency acmotor2.blogspot.com signal of eddy current loss, the high frequency component is converted into heat loss. So the copper and magnetic beads absorption effect to the high frequency components, so sometimes also called absorption filter.

DBJ08-20-98 household electric equipment should meet the following standard

 three phase induction electric motor Y series B35 1.5KW 2.2KW 37KW 75KW
Specifications
-One year warranty 
-Within 25 days delivery 
-Life: 5-7 years
7, balcony should establish artificial water pump lighting. The balcony lighting device, can improve the environment, easy to use. Especially the closed balcony set lighting is necessary. The balcony wear tube Electric motor dark apply flare path. If building embedded at the end, the application of sheath line Ming fu. 8, residential public position must be set of artificial lighting, in addition to the high-rise residential elevator hall and emergency lighting, the rest should use energy-saving switch. Power supply small diesel engine is connected to the public on the meter. According to the fire code, high-rise residential elevator hall and emergency lighting is not diesel generator set closed, so can't use energy-saving three phase induction motor single phase induction motor switch. 9, houses should be equipped with line TV system, its equipment and wiring should meet the requirements of cable diesel generator set networks, a small set of household should set terminal box of a double hole TV system, medium and large set of each set should be not less than two television system double aperture terminal box, terminal box diesel engine side shall have the acmotor2.blogspot.com power outlet. In construction, whether the area cable in place, should have the TV terminal box.

DBJ08-20-98 rule household electrical equipment shall comply with the following standards - other ordinary socket

ac electric motor stator copper winding 
Specifications
1. Material: silicon steel  
2. 20 years manufacturing experience 

3. competitive price,high quality 
22, other ordinary socket: generally is to use wire of 2.5, according to room size commonly divided into 1 ~ 2 loop (refers to a flat, a big house or lamination more than two loop), generally small point of ac motor a loop, larger 2 circuits. First generator of 3 phase induction motor all be clear, we ac synchronous generator are currently equipped with multi-purpose 1.5 while the light line of wire, this from national specification is not right, but personally, I support this way. National specification is under 2.5 shall not be used as the main line, that is to say, it will take into the switch line 2.5, out of ac synchronous generator the line switch to the lamp with a can. However, the specification is considered the worst wiring way and calculation time without considering the energy-saving fluorescent lamp. Before we don't have to meet can lamp water pump price wattage is great, but now is energy-saving lamps, power is very small, 1.5 wire is far enough, can not waste is not wasted. Some families to shoot the light, of course, many, many crystalline light, this case 1.5 is not enough, so, particular case is particular analysis. Lamp line we recommend usually divided into 1 ~ 2 loop (except flat layer, the villa), 1 small points, large still two good, load is one aspect, the key is acmotor2.blogspot.com that squirrel cage induction motor if the evening lamp circuit is broken I failed, there is a lighting circuit.

Increased safety explosion-proof motor

 motor lamination three phase induction wound rotor 
Specifications
1. Lamination of electric motor 
2. IP54 class F 
3. 100% copper 
4. silicon steel stamping 
5.stunning performance 
Overview add Ann type motor is a kind of explosion-proof performance is lower than the flameproof and higher than that of ordinary industrial enclosed type explosion-proof motor. The basic principle of explosion-proof is under acmotor2.blogspot.com normal operation conditions won't produce arc, spark or may ignite an explosive mixture of high temperature on the motor structure of take security measures to improve the safety degree, in order to avoid in the normal and recognition of appear the phenomenon of the motor overload conditions. The category of motor with explosion-proof performance. Measures are: the electrical equipment installed in a shell, motor parts the enclosure is can withstand the internal pressure, the explosion of explosive mixture and can prevent the spread of the explosion of the internal to the electric motor 12v 500w enclosure surrounding explosive mixture structure (flameproof); 

DONGFENG Brand Two Speed Motor
Specifications
1. DONGFENG Brand Two Speed Motor 
2. 3000RPM-750RPM 
3. Electrical motor 
4. factory price best quality 

5. 100% copper 
Make motor electrically charged components cannot produce enough to cause explosion danger of spark and arc or dangerous temperature, or electrically charged components on these phenomena may be produced with the explosive mixture partition, make it can't touch each other or not with explosive danger degree (increased safety, ventilation, etc.). In all kinds of explosive dangerous environment, correctly selecting and all kinds of equipment form a complete set of explosion-proof motor is very important. Is a kind of explosion-proof electric motor can 3 phase induction motor be used in inflammable and explosive factory of a motor, the runtime does not produce sparks. Explosion-proof motor is mainly used in coal mine, petroleum, petrochemical and chemical industry. In addition, in the textile, metallurgy, city gas, transportation, grain and oil processing, paper making, medicine and other departments have also been widely used. As a major power equipment, explosion-proof electric motor is often used to drive pumps, fans, compressors and other mechanical transmission.

Current transformer

Cast Iron electrical motor auto spare parts 
Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality

3. Delivery Detail:within 10 days after receiving deposit 
With current transformer and relay device coordination, mainly occurred in line short circuit overload failure, such as to provide signal to relay device to cut off the fault circuit, to protect the security of the power supply system. Protection with micro current transformer entirely different working conditions and the measurement of transformer, transformer protection is just in several times more than normal current current when to begin to work effectively. Protection of transformer main requirements: 1, insulation and reliable, and 2, enough accuracy limit factor, 3, enough thermal stability and dynamic stability. Protection of transformer single phase induction motor under the rated load can satisfy the requirement of accurate level maximum rated primary current is accurate limit current at a time. Accurate limit coefficient is accurate limit a current rating and electric motor price the rated current ratio at a time. 


gost motor 7.5kw
Specifications
1. effiency: IE2 and IE1 
2. 20 years manufacturing experience 
3. 12 months guarantee 

4. low noise and vibtration
When an electric current is big enough iron core is saturated don't reflect the role of primary current, accuracy limit factor is said this feature. Protection of transformer accurate level 5, 10 p, p said when accurate limit a current rating the margin of error of 5%, 10% circuit failure occurs to produce heat and electromagnetic force, the impact of the current protection with current transformers have to bear. Secondary winding short circuit, current transformer in one second can withstand without damage of a current RMS, said rated short-time thermal current. Secondary winding short circuit, Single phase motor current transformer to withstand without damage in a peak current, according to dynamic stable current rating. Protective current transformer can be divided into: 1, the current transformer overload protection, 2, current transformer differential protection, 3, earthing protection current transformer (zero sequence current transformer)

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.

The selection of ac contactor and operation maintenance

 (1) to electrical motor choose:(1) rated current of the primary loop contacts should be greater than or equal to the rated current,accused of equipment control motor contactor should also be considered the starting current of the motor.In order to prevent frequent operation of contactor main contact ablation,frequent movement of contactor rated current can reduce use.(2) the electromagnetic contactor coil rated voltage is 36 v,110 v,220 v,380 v,the electromagnetic coil allows within the scope of 80%~105% of rated voltage.(2) operation maintenance:(1) check in the operation of the project:1) by the load current is within the contactor ratings;2) contact points and the signal is consistent with the circuit state;3) running sound acmotortrading.blogspot.com is normal,have because poor contact and heat discharge;4) with or without electromagnetic coil overheating electromagnet short-circuit rings with and without exception.5) arcing cover any loose and damage;6) auxiliary contact with and without damage;7) transmission part with and without damage;8) have running environment without adverse factors of running around,such as too much vibration is too large,poor ventilation,dust,etc.

(2) maintenance:in electrical equipment maintenance work,to maintain the contactor shall work.1) external maintenance:a.external dust cleaning;B.check all fasteners are loose,especially the conductor connection parts,prevent loose contact and fever;2) contact system maintenance:a.check of dynamic and static contact position is,whether the three-phase closed at the same time,the contact spring should be adjusted if you have any questions;B.check contact wear,wear depth shall not be more than 1 mm,contact burning,welding off,must be change in time;When slight loss,generally does not affect the use.Clean the contact is not allowed to use sand paper,should use the plastic file;C.and measuring insulation resistance,electrical motor resistance of not less than 10 m Ω;D.check whether the auxiliary contact action is flexible,contact schedule should comply with the specified value,check whether there is any loose fall off on contact,found the problem,should be timely repair or replacement.3) maintain core parts:a.cleaning the dust,especially the moving parts,and between the core and interface;B.check the fastening situation of iron core,iron core run loose cause noise increase;C.core end ring have fall off or break to repair in time.4) electromagnetic coil maintenance:a.measuring coil insulation resistance;B.the coil insulation discoloration,aging,coil surface temperature should not exceed 65 ° C;C.check the coil wire small electric motors connection,if there are any open welding,burning loss should be timely repair.5) arcing cover parts maintenance:a.check whether the arcing cover is damaged;B.arcing cover any loose and location changes;C.remove arcing cover gap within the metal particles and sundry.


(3) working principle of the vacuum contactor,vacuum contactor with vacuum arcing medium,its main contact seal in a special vacuum arcing tube.When operating coil electricity,armature,absorption in the contact spring and vacuum tube autistic force under the action of contact closure;Operating power coil,the armature reaction spring overcome vacuum tube autistic force release,off contact.Contactor breaking current,the contact gap formed by metal vapor can be formed in the platinum scale,affect the service life of the contactor.

Three-phase asynchronous motor

As a motor running of three-phase asynchronous motor.Three-phase asynchronous motor rotor speed is lower than the speed of the rotating magnetic field,rotor winding due to single phase ac motor there is relative motion between magnetic field and induced electromotive force and the current,electromagnetic torque and interact with the magnetic field,the realization of energy conversion.Compared with single phase asynchronous motor,three-phase asynchronous motor operation performance is good,and all kinds of materials can be saved.According to the different rotor structure,three-phase asynchronous motor can

be divided into the cage and winding type two single phase asynchronous motorkinds.The cage rotor asynchronous motor has simple structure,reliable operation,light weight,cheap,has been widely used,its main drawback is that control difficult.Wound rotor three-phase asynchronous motor 5kw permanent magnet generator rotor and stator www.dongfeng-motor.com is also set up a three-phase winding and through the slip ring,brush with external resistor connection.Adjust the rheostat resistance can improve the starting performance of the motor and to adjust the speed of the motor.

220V YCL high torque low rpm electrical motors single phase asynchronous water pumps run and start capacors IE1 IE2 CE GOST

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