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

 Stator And Rotor ac induction motor parts 
Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality 
3. Material: silicon steel 
24, empty equipped. We now most of the electrician fully match, computing power, not the empty open far very worthy, what is the purpose of the open? diesel engine Is tripped when overload protection appliances and 3 phase generator induction motor circuit, so big that he has to jump do you use? Don't. Through all these 1, 2 years of propaganda is better, before is completely 3 phase induction motor random. Actual calculation is very simple, is the ampere = power/voltage. If done in strict accordance with the electrical specification, general 1.5 wire with 10 a; 2.5 wire diesel generator set with 16 a; With 20 a four square wire. Open frequent trip also is bad, of course, we should consider the single phase induction motor current voltage instability or improper open design, synchronous generator therefore, can according to the distribution of the above, can also according to acmotor2.blogspot.com a high level, with 16 a 1.5; 2.5 with a 20; Four square with a 25 is feasible. As for the total open, in 120 ~ 130 in the following set of house, 2 p40a is enough, also with the high, into the household electric meter is how much, you are not afraid of electric meter was burned?

The installation of the switch and outlet boxes and panel, connection is not in conformity with the requirements

 Stator And Rotor ac induction motor parts 

Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality 
3. Material: silicon steel 
1, the phenomenon of electric motors (1), the box embedded too deep, different level; Panels and Water pump wall body between cracks, lac pollution, not flat. (2), box with mortar sundry. (3), phase line of switch and outlet, the zero lamination line, PE line are concatenated phenomenon. (4) the wires, switches, sockets thrum exposed, fixed bolt looseness, box conductor is absence. 2, root cause analysis (1), embedded box without reliable fixation, template expansion mode, installation time coordinates are not accurate. (2), construction personnel is not strong sense of responsibility, the use of electrical safety importance understanding insufficiency, the easier. (3), there is not reasonable to save material. 


Electric Motors 1 HP 3PH
Specifications
1. Shape: squirrel cage
2. CE.ISO CCC 
3. Side Terminal Box 
4. Free Foot Mounting 

5. 100% copper wire 
3, preventive measures (1), in close coordination with small diesel generator set diesel engine the civil engineering professional, accurate reliable fixed box; When embedded box is deep, should be equipped with a box. Installing a panel to horizontal flat vertical, application level calibration level, ensure the installation height of unity. In addition, diesel generator set after install panel to full seams, are not allowed to leave aperture, be clean protection panel. (2), strengthen supervision and management, ensure the phase switch and outlet line, zero line, PE line rotor and stator protection cannot be concatenated, clean up the first container of mortar. (3), fixed size when stripping, guarantee the thread tidy uniform, thread www.facebook.com/guohong.trading after installation not naked; To strong pressure wire at the same time, the single conductor when the insert line hole should be generator set spread into twin, screw tight, tight. (4), switch, socket box wires should have certain allowance, is 100-150 - mm; To resolutely put an end to the unreasonable material greed.

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 
Micro current transformer is similar to the transformer is also according single phase motor to the principle of electromagnetic induction to work, is the voltage and the micro current transformer of transformer transformation transform is current. As shown in figure measured current winding N1, called the primary winding (or the original winding, primary winding); Winding N2 measuring instrument, electric motor price known as the secondary winding (or) vice winding and secondary windings. Micro current transformer primary winding current I1 and I2 secondary winding current ratio, than the actual current K. Micro current transformer in the motor electric rated electric current work shed than called current transformer rated current ratio, expressed in Kn. Micro current transformer can be roughly divided into two classes, measuring current transformer and protection current transformer.

The use of the insulation resistance meter megohm meter method

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 
Megohmmeter at work, its produce high voltage, the measured object is electrical equipment, so must be used correctly, otherwise it will cause personal and equipment accident. Before use, first of all, to do well the following preparation: (1) the measurement device under test must be before the power cut off, and the short circuit discharge, never promised to electric measuring equipment, to ensure the www.dongfeng-motor.com safety of person and equipment. (2) the possible induction of high voltage equipment, must eliminate this possibility, can be measured. Analyte (3) to clean surface, reduce the contact resistance, ensure the accuracy of measurement results. (4) to check whether megohmmeter before measuring the normal working state, the main check the "0" and "up" two points. The rocking handle, make the motor to achieve rated speed, when short 3 phase induction motor circuit by megger refers to the "0" position, should be to point to in the "up" position when open. (5) when used by Induction motor megger should be in a stable, strong place, permanent magnet motor and away from the big current conductor and external magnetic field.

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.

Electronic expansion valve

 electric motor 20hp aluminum body 
Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality 
3. Brand Name: FUJIAN DONGFENG MACHINERY ELECTRICAL LIABILITY CO., LTD

Electronic expansion valve is adjust the volume of evaporator for liquid according to the preset program, belongs to the electronic control mode, so called electronic expansion valve. It adapt to the development of generator set spare parts the refrigeration and electromechanical integration requirements, has the good characteristics of thermal expansion valve can't compare with, provides conditions for intelligent control of cooling system, is a very promising control energy-saving components. The primary use of electric vehicle motor electronic expansion valve thermal expansion valve and the same, variety structure, but on the performance, there are many differences between this two. From the point of view of control implementation, the motor electric electronic expansion valve by the controller, actuator and sensor 3 parts, as most of the electronic expansion valve only refers to the actuator, namely controlled drive and body, only this part wholesalemotor.blogspot.com is actually unable to complete the control functions. The core of electronic expansion valve controller hardware for the single-chip computer, such as the controller at the same time to complete the compressor and the fan frequency conversion control functions, such as generally in the form of machine level even more. Electronic expansion valve sensor usually adopts the thermocouple or heat resistance.

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.

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.

Some problems that should be paid attention to when the PC program

The application of programmable controller (PC),we often encounter of the relay control system transformation problem,then we tend to refer to the original relay control circuit to prepare the PC application. In programming,therefore,we should pay attention to the PC electrical motor control system and relay control system some different on the way to work.Because of the relay control system is a "parallel" way to work,and its contact on-off needs certain action time. So when the starting circuit,time relay KT delay time,KT whether can continue to ac induction motor keep the current state,"parallel" two actions need to be considered at the same time process: KT normally closed delay off contact,KA1,losing electricity KA1 normally open contacts disconnect; KT normally open delay contact closure,KA2 electricity,KA2 normally open contact wholesalemotor.blogspot.com closure. The results of the two process function,to determine the status of KT. At the same time,the existence of the action time of the contact,makes the circuit in time sequence. So the circuit can not reliable work. If join the empty boxes in the loop,and as shown in high efficiency electric motor figure 1 the KA2 normally open contacts into KA3 normally open contacts (see figure 1) brackets. As a result,KT,the KT itself lost electricity,will not continue to maintain current state.

Electrical fault

 Has become more and more widely used in the production of electrical equipment,and electrical failure is inevitable,how to search and eliminate electrical fault according to the fault phenomenon is facing a big problem.Electrical maintenance personnel is to face and solve the outstanding problems electrical motor of the main technical force,in actual production application can accurately locate the fault,and troubleshoot make electrical equipment can steadily run normally every maintenance personnel is fork service motor run capacitor and responsibility.The article illustrates the general steps of electrical troubleshooting and troubleshooting methods.In the practical work,we will meet different electrical fault,the generation of electrical fault electricalmotor1.blogspot.com is strange,troubleshooting methods and ways can only according to the specific situation of the fault,no strict mode and method,will be difficult for part of the maintenance personnel,in the process of troubleshooting,tend to go asynchronous motor a lot of detours,even cause bigger loss.As a maintenance electrician,in case of electrical failure,can accurately find out the cause of the problem,reasonable troubleshooting correctly,to improve labor productivity,reduce the economic loss and safety in production is of great significance.

Three-phase asynchronous motor fault analysis and processing method

Winding is part and parcel of the motors,aging,be affected with damp be affected with

damp,heat,erosion,foreign bodies,intrusion,the impact of the external force can cause damage to

winding,motor overload,under voltage,over voltage,lack of phase operation can also cause winding fault.Winding grounding,short circuit,open circuit fault generally fall into winding,connection errors.Now separately failure phenomena,causes and inspection method.A,winding grounding Refers to the winding and iron core or with insulation casing damage caused by the grounding.1,failure

phenomenon Chassis charged,heat control circuit is out of control,winding short circuit,the normal

operation of the motor.2,the reason Winding insulation resistance decreased,motor overload long-term operation of be affected with damp be affected with damp,harmful gas corrosion,metal foreign body into internal damage to the wholesalemotor.blogspot.com insulation,rewind stator windings insulation when damage to core,winding end touch end cover frame,stator rotor friction cause burns,lead insulation insulation damage and shell,and overvoltage (such as lightning) insulation breakdown.Methods to examine 

3.(1) the method of observation.Through visual winding overhang and line slot insulation observed with and without damage and charred traces,is the pick up location.(2) the multimeter test.The multimeter low-resistance archives check,reading is very small,it is grounded (3) megohmmeter.Selected according to different levels of different measuring each group resistance of insulation resistance by megger are,if the reading is zero,then the winding grounding,but the motor insulation be affected with damp be affected with damp or breakdown due to accident,must determine on the basis of experience,generally pointer swing timing in "0" place,its have certain resistance value can be thought of.(4) water pump motor try to light.If try lights,winding grounding,if found somewhere with a spark or smoke,is the place for winding grounding fault point.If lights dim the insulated grounding breakdown.If the light is not bright,but also showed a spark when the test stick ground,winding yet breakdown,just seriously be affected with damp be affected with damp.Also can use hardwood on the edge of the shell of the seam allowance tapping,to a certain place when a out a bright,when electrical current when broken,it is ground.

(5) current wear burning www.facebook.com/guohong.trading method.With a regulating transformer,after the power is connected,ground quickly small electric motors heating and insulation smoke is the pick up location.Should pay special attention to small motor shall not be more than twice the rated current,no more than half a minute,large motor as 20% - 20% of rated current or increasing current,burning to the ground just immediately without electricity.(6) packet elimination method.For the pick up location in iron core and burning more severe,in my heart burning loss of copper and iron core melt together.Approach is to put the grounding of one phase winding is divided into two and a half,and so on,finally find out the ground.In addition,there is high pressure test method,magnetic exploration method,power frequency vibration method,etc.4.The processing method (1) winding drying should be affected with damp be affected with damp cause ground,when cooled to about 60-70 ℃,pour insulating paint again after drying.(2) the end winding insulation damage,on the insulation processing is located in the back,painted and drying.(3) windings to place in the groove,should rewind or replace part windings components.Finally apply different measured by megger,meet the technical requirements.

The dc grounding method 3

Hybrid grounding: so-called hybrid grounding is within a device of the circuit board in the shortest wire connected to the chassis,or signal circuit is the base of the related equipment,in the shortest wire grounding connected to the same metal body,and then multiple devices with wire received a fixed in the same spot.Like this grounding method called hybrid grounding.Hybrid grounding in engineering is the most simple way,is in the ac power into house master switch,the zero line repeat grounding (or zero line connects to housing on the structure of the main generator stator steel bar),and then in the power of the zero line leads to a PE line should wholesalemotor.blogspot.com connect all grounding point.Second,ring grounding network for earth,is the grounding body into a closed loop around the building.

Within such ground network to make the interface of the electric field electric motors price distribution is evener,step to reduce the harm to people,and also reduce indoor when affected by lightning,and because of the large ground potential gradient to counter the risk of high pressure equipment.Three,base earthing body: use the steel bar inside the building foundation,according to the requirements of "specification" connection low rpm generator alternator of grounding body called base earthing body.Some people think that,in the basis of reinforcing bar,concrete cover the impossible and the conduction of grounding body.Is,in fact,good insulation dry concrete and concrete in contact with the water of the soil containing water,capillary absorbs moisture to keep the concrete with high water content in concrete,and thus reduce the resistivity of the concrete with the earth if one.

Three-phase asynchronous motor wiring diagram

Three-phase asynchronous motor wiring diagram:three-phase three-phase motor stator winding of each phase winding has two thread ends.A head is called the head end,on the other side called terminal.Provisions of the first phase winding head end use D in table 1 ,end in 4 D; The second phase winding head end with D2,said end D5 said; The third phase winding end of the first represented respectively with D3 and D6.The electric vehicle motors ix thrum import terminal block wiring Column,the terminal marked accordingly D1~D6 tag,as shown in figure (1).Six of the three-phase stator winding end three-phase stator windings can be a star or triangle,y connection is a three-phase winding End up in parallel,the D4,D5,D6 three terminal with copper link together,and the three-phase winding head end access three-phase ac power supply respectively,the D1,D2 and D3 access A and B,respectively C power supply,as shown in figure (2).And triangle by law is the first end of the first phase winding to the 1 D connected to the end of the third phase winding D6,access to another phase power; The second phase winding head end with D2 At the end of the first phase winding connected D4,access to the second phase power; Head end of the third phase winding D3 connected to the end of the second phase wholesalemotor.blogspot.com winding D5,and access to the third phase power supply.In the wiring board will be answered Line column and D6 D1,D2 and D4,D3,and D5 with copper connected respectively,then access to the three-phase power supply respectively,as shown in figure (3).An electric motive is pick a star or triangular,should regard factory rules For,available from the motor nameplate.Is the first of the three phase stator winding end manufacturers set beforehand,never can be arbitrary,but a first end of the three-phase winding up can be reversed, For example will be the motor fan end of the three-phase winding D4,D5,D6 upside down as the head end,D1,D2 and D3 as an end,but never separate the ends of the head of a phase winding upside down,otherwise will produce wrong wiring. If wrong wiring junction box found raw,or winding end of the first mistake,light can't the normal starting motor,long electricity causes starting current too big,motor heating is serious,affect the life, Or burning motor winding,or cause the power short circuit.