The second switch function

  generator Stator Rotor 
Specifications
1. 20 years manufacturing experience
2. competitive price,high quality

3. Accessories Series: stator and rotor

In computer network system, the concept of exchange is the improvement of the Shared work patterns. Have we been introduced before the HUB of the HUB is A Shared equipment, the HUB itself does not recognize the destination address, host A to host B when the same local area network data transmission, data packets in with the architecture of the HUB is broadcast on the network mode of transmission, by acmotor2.blogspot.com every one terminal via validation data in baotou address information to determine whether to accept. That is to say, in this way of working, the same time can only transmit a set of data frames on the network of communication, if a collision have to try again. This way is Shared network bandwidth. Switches have a very high bandwidth of the back of the bus and internal exchange matrix. 

Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor
Specifications
Specifications1.3-phase asynchronous motors 
2.IEC standard 
3.OEM 
4.Voltage:50HZ &60HZ;380V&415V 

5.Protection class: IP54 

All switch ports are articulated in the back on the bus, the control circuit receives packets, deal motor with port looks for in memory in order to determine the destination MAC address table (network adapter hardware address) of the NIC (NIC) articulated in which port, through internal exchange matrix quickly to send the packet to the destination port, if there is fan motor no destination MAC to broadcast to all ports, exchange the opportunity to "learn" after receiving port in response to the new address, and put it in the internal address table. Using switches can also keep the network "block", through contrast address table, only allows the necessary network traffic through the switch. Through switches filtering and forwarding, can effectively isolate the broadcast storm, reduce the occurrence of package and the wrong package by mistake, avoid sharing conflict.

Three-phase asynchronous motor winding short circuit

Due to the large motor current is too large and the change of supply voltage mini electric motor and single phase operation,mechanical,manufacturing bruised bad insulation damage caused by such as winding interturn short circuit,short circuit between windings,winding interelectrode interphase short circuit and winding short circuit.Fault phenomenon: 1.The magnetic field distribution of ions,three phase current balance and make the motor vibration and noise when running,serious acmotortrading.blogspot.com when motor can't start,and have great short-circuit current in coil of short circuit,lead to rapid heating coil and burned.2.The reason: motor overload for a long time,lose insulation aging of insulation;Wire insulation damage;Winding be affected with damp be affected with damp decreased insulation resistance caused by insulation breakdown;End and not cushion layer insulation material or plastic damage;End connection wire insulation damage;Or been struck by lightning overvoltage insulation breakdown;Friction between rotor and stator winding end insulation damage;Too many metal foreign bodies fall into the inside of the motor and oil pollution.

3.Check: (1) the external observation method.Observation of junction box,winding end with or without burning,winding overheating after leave a dark brown,and has a bad smell.(2) temperature control method.No-load running for 20 minutes (found abnormal should immediately stop),with the back of hand touch winding parts ac electric motors is more than normal temperature.(3) the electricity experiment method.With current meter measurement,if one phase current is too large,have indicated that the phase short circuit.(4) the bridge inspection.Measuring a winding dc resistance,general difference should not exceed 5%,such as more than small,resistance of a phase short circuit fault.(5) short circuit detection method.There is a short circuit the winding under test,the sheet steel can produce vibration.(6) multimeter or megohmmeter.And any two phase winding insulation resistance measurement,if read very small or zero,shows that the two phase winding and has a short circuit.(7) voltage drop.After the three winding in series into the low voltage security alternating current (ac),the study measured a group of small fault.(8) current method.Motor no-load running,to measure the three phase current,in two phase switch,measure and electric motors price contrast,if he does not change with the power switch,a phase winding large current has the short circuit.

4.Short circuit processing method: (1) the short circuit point in the end.Insulating materials available to separate short-circuit point,also can be double insulated wire,to paint drying.(2) short circuit online slot.After the softening,find out the short circuit point repair,back into the trough,then paint drying.(3) the short route turns less than 1/12 of each phase winding,the serial number of turns all cut short route,connect the conduction part,forming a closed loop,supply urgent use.(4) winding short-circuit point when the number of turns more than 1/12,to dismantle all rewind.

Ammeter pointer during no-load or load running back and forth

1),2) squirrel cage rotor broken bar,a phase winding rotor circuit (3),a phase of wound rotor type motor brush contact bad 4),wound rotor type motor Poor contact slip ring wholesalemotor.blogspot.com short circuit devices 9.The cause of motor vibration 1),2) unbalanced rotor,shaft bending head 3) 4),imbalance of pulley,pulley eccentric shaft hole 5),fixed the loose bolts 6) of the motor,fixed The acmotortrading.blogspot.com foundation of the motor not firm or uneven 10.The cause of the motor bearing perkins diesel generator set overheating 1),2) bearing damage,lubricating oil too much,too little,or oily bad with 3),bearing and perkins diesel generator set shaft too loose walk in circle or too close with 4),bearing and end cover too loose walk outside Or too close.5),sliding bearing ring rolling or slow rotation 6),on both sides of motor end cover or bearing cover is not flat 7),belt tight 8),coupling packed Not good.

Three-phase asynchronous motor fault maintenance

Journal wear is not big,can be in shaft neck on a layer of chrome plating,grinding to need size;Wear

is large,can be in shaft neck for surfacing welding on to the lathe cutting polishing;If the journal

wear too much,also on the shaft neck turning 2-3 mm,car a sleeve again,strike set on the neck,and

then turning to the required size.If bending is not big,but by the method of grinding optical axis

neck,slip ring repair;If bending more than 0.2 mm,can put in the press,the rotating shaft in bend

pressure correction,after correction of the surface of the shaft with lathe cutting polishing;If the

bending is too large,the new shaft electric vehicle motor are subject to change.Rolling bearing oil shortage,can hear the sound of the "bone bone";If heard discontinuous "terrier infarction",may be bearing rims rupture.Y series three-phase asynchronous motor bearing inner mixed with sand and other debris or bearing parts had mild wear,create a slight noise.The transverse crack depth of no more than three phase asynchronous motor shaft axis diameter does not exceed the 10% to 15%,the longitudinal crack of 10% longer axis,surfacing method remedies are available,and then finish turning to required size.If shaft crack in more serious,need to replace the new shaft.

Chassis and end cover if there is a crack should be welding repair.If meet the bearing bore clearance is too large,resulting in bearing end cover with too loose,generally available will punch bearing uniform with burr hole wall,then into the end cover of the bearing.For motor power is bigger,also can be used with or plating method,finally work out the

size of the bearing need.(set,rotor are made by insulating silicon steel sheet pile into each

other,is the magnetic circuit part of the motor.,the damage and deformation of the rotor iron core is

mainly due to acmotortrading.blogspot.com the following

aspects.(1) bearing excessive wear or bad assembly,and rotor rub,make the surface damage of the iron core,and cause a short circuit between silicon steel sheet,motor iron loss increase,make the motor temperature rise too high.Then apply smooth file tools such as deburring,eliminate short silicon steel sheet,clean up after coated with insulating paint,heating and drying.(2) when the demolition of the old winding force is too big,make the stolen slot askew and open outward.The application of needle nose pliers,wooden hammer tools such as finishing,to reset the tooth bad,bad and reset has a gap between silicon steel sheet to join green shell paper,veneer rigid insulation materials,etc.Due to reasons such as the surface corrosion of the iron core (3) because of be affected with damp be affected with damp.At this moment need sandpaper clean,clean up after coated with varnish.(4) around like a heat burning core producing bad or teeth.Can use chisel or scraper tools such as deposition

thing out clean,coated with insulating paint dry.(5) between motor fan the core and base combined with

loose,tighten the original positioning screw.If positioning screw failure,can stand on the drill

positioning hole and tapping,tighten the set screw.Rusty spot on the surface of the bearing surface

available 00 # sandpaper erase,and then into the gas cleaning;Or bearing have crack,inside and

outside the ring rupture or bearing excessive wear,a new bearing should be replaced.Replace new

bearing,bearing should choose the same as the original model.Ac motor shaft through the bearing support,was part of the heaviest load,it is easy to wear and tear parts.

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MS Series Three Phase Asynchronous AC Motor

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OEM Brand Motor Electric 3 Phase

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ELECTRIC 3 PHASE!!!Y SERIES ELECTRIC MOTOR

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