How to choose and switch

high efficiency high power electric motor Y2 motor

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

4. low noise and vibtration
Switches as the main equipment of the network connection, determines the performance and stability of the network itself. Along with the company size is different, the structure of the network also has the very big difference, the switch must also depends on the specific circumstances, but in order to make the company can undertake a large number of network data transmission and lasting stable running safely, must choose to comply with the 3 phase ac induction motor performance of the conditions and price appropriate switches. Personally, electric motor parts I engaged in this work for a while, the technology and properties of the current switch has some basic views, the hope can give you some reference: Switches in recent years there are a lot of new technology, some technology is very useful. (1), Trunking, Trunking technology can be without changing the existing network equipment and wiring of the original conditions, multiple low bandwidth will switch ports bundled into a high bandwidth link exchange, through several port link load balancing, avoiding the phenomenon of link congestion. In the part of the company's network backbone equipment can use this technology: the network traffic is bigger, but actual condition is not allowed to use under the condition of cable, using Trunking can solve the bottleneck problem of data transmission. Induction motor (2), the third layer switch based on the development of the fourth layer switches. This is a relatively new feature, introduce in detail here.

The classification and characteristics of ac regulated power supply

Able to provide a stable voltage and frequency of power supply according to ac regulated power supply.At present most domestic manufacturers is the work done by ac voltage stability.Below the market some ac regulated power supply,the classification characteristics. motor vehicle spare parts Parameter adjustment (resonance):this kind of regulated power supply,voltage stability is the basic principle of LC series resonance,the early type of magnetic saturation voltage stabilizer is belong to this category.It has the advantage of simple structure,without many of the components,reliability is quite high ac electric motor voltage range is wide,strong anti-jamming and resistance to overload ability.The disadvantage is that large energy consumption,noise big,bulky and high cost.On the basis of the principle of magnetic saturation of development into the formation parameters voltage stabilizer and China have been popular in the 50 s of "magnetic amplifier gather digital ac voltage stabilizer" (614) are the principle of ac voltage stabilizer.Autoformer (than) gather: 1,mechanical pressure regulating type,i.e.,according to the servo motor to drive the carbon brushes in autotransformer winding sliding surface move,change Vo on the ratio of the Vi,in order to realize the adjustment of the output voltage and stability.

The voltage stabilizer can from several hundred to several kilowatts.It is characterized by simple structure,low cost,the output waveform distortion small; But because the carbon brush sliding contact are prone to edm,brush damage that burned and failure; Slow speed and voltage regulation.Type 2,change the tap,autotransformer to make multiple fixed tap,through a relay or SCR (SSR) as switch machine 10,automatically change the tap position,so as to realize the stability of output voltage.This type of circuit voltage regulator the method is simple,wide voltage stabilizing range (130 v to 280 v),high efficiency (95%) or higher,the price is low.While the disadvantage is that low voltage stabilizing precision (plus or minus 8 ~ 10%) working life is short,it is suitable for the family to the air conditioner power supply.Power voltage compensation type electrical motor - purifying type (including precise voltage stabilizer) it USES compensation link to realize the output voltage stability,easy to implement microcomputer control.It has the advantage of good anti-jamming performance,high precision voltage (+ / - 1%) or less,fast response (40 ~ 60 ms),simple circuit,reliable operation.

The disadvantage is that: with the computer,program-controlled switches,such as nonlinear load are low frequency oscillation phenomenon; Input side current distortion degree is big,the source power factor is low; The output voltage to input voltage phase shift.Against interference function to demand higher units,it is advisable to apply in the city,computer power supply,must choose the computer about 2 to 3 times the total power voltage regulator to use.Because has stabilized,anti-jamming,the advantages of fast response speed,moderate price,so widely used.Switching regulated power supply: it is applied to the high frequency pulse width modulation technology,and it is the difference between general switch power supply output must be with the input side of the same frequency and phase ac voltage.It had quasi square wave output voltage wave type,type of ladder wave,sine wave,etc.,in the market for uninterruptible power supply (UPS) from the storage power supplies and chargers,ac voltage regulator is a switch mode power supply voltage regulator and control function is strong,easy to realize intelligent,is a very promising ac regulated power supply.But because of its circuit www.facebook.com/dongfeng.motor is complex,the price is higher,so to promote more slowly.

A,the structure of the three-phase asynchronous motor

A,the structure of the three-phase asynchronous motor,is made up of stator,rotor and other accessories. 1,the stator core Part of motor magnetic circuit,and placed on the stator winding.Structure:the stator iron core by 0.35 ~ 0.5 mm thick surface is commonly insulating layer of silicon steel sheet coining,overlying and become,within the core of the circle has a uniform distribution trough,which embedded in the stator winding.Trough the stator core has the following kinds:Semi-closed type slot:the efficiency and power factor of three phase generator the motor is higher,but the winding wire and insulation are more difficult.Commonly used in low-voltage motor.Half-open mouth slot:can put molding winding embedded,commonly used in large and medium-sized low-voltage motors.The so-called forming the windings can be treated with insulation in advance and then into the slot.Open rack slot:to put molding winding embedded,insulation method is convenient,mainly used in high voltage motor.2,the stator winding Access is the circuit part of the motor,three-phase alternating current (ac),to produce a rotating magnetic field.Structure:by the three in the space between 120 ° Angle,said arrangement can be connected with the same structure of the winding,the winding of the coil embedded respectively according to certain rule In electric motor laminations the stator slot.

The main of the stator winding insulation project has the following three:(guarantee between the

conductive part of the winding and iron core reliable insulation and reliable insulation between the winding itself).(1) of insulation:the whole and the stator winding insulation between the stator

core.Between diction and insulation:each phase of the stator winding insulation.(3) the turn-to-turn

insulation:each phase of the stator winding turn-to-turn insulation each wire.The motor terminal box

wiring:Motor terminal box has a wiring board,six of the three-phase winding thread in two rows,up and

down and from left to right are the three most wiring pile arrangement of the no.1 (U1),2 (V1),3

(W1),pile bottom three wiring from left to right to arrange the Numbers for 6 (W2),4 (U2),5 (V2),the

three phase windings into stars Connection or delta connection.All manufacturing and maintenance

shall be according to the serial number.3,stand Function:fixed ends and to support the rotor,stator

core and plays a role of protection,heat dissipation and so on.Structure:stand for cast iron

parts,usually large asynchronous motor base plate is commonly used in welding,micro motor frame

adopts cast aluminum.Enclosed machine stand outside Face with radiating rib to increase the cooling

area,protected on both ends of the frame of the motor end cover open vent,make motor inside and

outside air electricalmotor1.blogspot.com convection,can be directly to facilitate heat dissipation.

Not want to rely on single-phase motor startup phase shift can be starting capacitor?

That why some single phase motor as long as a capacitor operation. How to start? Single capacitance and single-phase capacitor motor small electric fan motor basic double with double values, the difference lies in the single-phase electric motor for double value just starting with the raised large and increase the starting torque capacity of capacitance, Starting when starting and running capacitors are connected to the www.facebook.com/guohong.trading motor winding, after perkins diesel generator set starting, starting capacitance disconnect, this task is performed by automatic centrifugal open, single-phase motor double value Commonly used in bigger starting power equipment, such as air compressor, etc...

The cause of the slow speed motor load runtime

1),2) the power supply voltage is too low,squirrel cage rotor broken bar 3) group,coil,or coil

short-circuit point 4),the coil or coil group has 5),the reverse phase winding 6) 7),overload,wound

rotor type a wholesalemotor.blogspot.com phase break 8),wound rotor type motor starting rheostat poor contact 9),brush and slip ring poor contact 2.The motivation of the voice is not the cause of the normal during operation 1),the phase of the stator and rotor brush 2),3),the rotor rubbing rotor blades touch shell 4) insulation paper,bearing the lack of oil 5),the motor with sundry 6),motor with buzz two phase operation 5.The motor shell charged reasons: 1),2) the power cord and ground wire to make wrong,be affected with damp be affected with damp,motor winding insulation aging reduce insulation performance (3),4) lead and junction box body contact,local winding Insulation Motor vehicle damage to wires touch shell relaxation stabbed 5),core wire 7) 6),grounding line failure,damage to the wiring board,or on the surface of the oil too much Excessive sparking 6.Winding rotor slip ring 1),2) slip ring surface dirt,brush pressure is too small (3) 4) jams,brush in the brush,brush deviating from the neutral position 7.The motor temperature rise too high or the reason of rotor balancing machine smoking 1),2) power supply voltage is too high or too low,overload 3),4),the stator winding single- phase running ground 5),6) bearing damage or bearing is too tight,the stator winding Group of turns or interphase short circuit 7),environmental temperature 8),motor fan duct not free or damaged.

Three-phase motor open phase protection and current changes

Its working principle: Combination switch Q closed first, prepare for motor starting. The main circuit and control circuit and electricity, connect to A, C and two ac contactor coil KM2 electricity, iron core is sucked, concatenated in ac contactor KM1 normally open contacts closed KM2. When press the starting button SB2, ac contactor KM1 electric suction, main circuit of the three main contact closure, auxiliary contact since locking, starting motor M. When there is lack of phase motor, if the lack of A phase or C phase, ac contactor coil KM2, losing electricity concatenated in ac contactor coil KM1 contact KM2 disconnect, make the ac contactor coil KM1 lost electricity, so the lock off contact, the contact is disconnected, the motor can't start losing electricity (right now) or stop; If lack of phase B, ac contactor coil KM1 losing electricity, the lock off contact, main contact disconnect, motor power, can't start (right now) or stop the operation. Thus ensure the motor in diesel generating set the circuit of phase is not 8500w gasoline generator destroyed.