Structure:(1) the contactor is mainly com posed of electromagnetic system,contact system,arc extinguishing system and other parts.(1) the electromagnetic system:electromagnetic system,including electromagnetic coil and core is an important component of the contactor,rely on it to drive the contact closing and opening.electric fan motor (2) contact system:contact with the executive branch of contactor,including main contact and auxiliary contact.The role of the main contact is switched on and off the main circuit,control a larger current,and the auxiliary contact is electric motor 12v 500w in the control circuit,in order to meet the requirements of various kinds of control mode.
(3) arc extinguishing system:arc extinguishing device to ensure off contact circuit,the electric arc reliable quench,reduce arc of contact damage.In order to quickly extinguished disconnected arc,contactor usually equipped with arc extinguishing device,generally USES half a longitudinal seam sealing clay arcing cover,with a ac induction motor 110kw strong magnetic blast circuit.(4) other parts:the insulation shell,spring,short circuit ring,transmission mechanism,etc.(2) working principle:when the electromagnetic coil is not energized the contactor,wholesalemotor.blogspot.com spring reaction force and bit core of gravity to keep main contact disconnected position.When the electromagnetic coil through control circuit on the control voltage (generally rated voltage),the electromagnetic force to overcome the spring inhale armature reaction to the static iron core,drive the main contact closure,processing circuit,auxiliary contacts with the action.
Two sets of 0.75 KW...Grade 4...380 v...The motor.No-load current is between 2.3 to 2.6...Work environment textile...'a lot...Rated current of the motor is only 2.2...Normal no-load current is around 1.6...Time machine completely under the condition of no load over current...Due to the current big.So high temperature sharply born...Will soon.motor magnet Overheating damage...Please 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 run capacitor Motor current 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...Just electric pilot time to run the old hot...Often the temperature in the 60-80 degrees...Wiring is right...electricalmotor1.blogspot.com 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 of them.In addition,the machine is idle for motor vehicle a long time,must have certain load.If is in use after a period of time (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 torque resistance.
Vacuum contactor with vacuum arcing acmotortrading.blogspot.com medium,ac motor electric 65kw 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 electric motors price 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 single phase asynchronous motor will form by the metal steam in the clearance.
The rotation of the single phase ac motor principle Only a single phase ac motor winding,is squirrel cage rotor.When a single-phase sinusoidal current in the stator winding,the motor can produce an alternating magnetic field,The magnetic field strength and direction of interplanting sine law of change at any time,but on the spatial orientation is fixed,so the magnetic field is also called alternation pulse magnetic field.The pay Variable pulse magnetic field can be decomposed into two at the same speed and direction of rotation are instead of a rotating magnetic field,when the rotor static,the two two rotating magnetic field in the rotor An equal and opposite torque,making synthetic torque is zero,so the motor can't rotate.When we use the motor rotates in the direction of a force (clockwise),then the rotation of the rotor and clockwise direction magnetic field between the cutting lines of magnetic force movement decreases; Rotor and the spin counterclockwise direction Turn the cutting lines of magnetic force between field.This balance is broken,the total electromagnetic torque generated by the rotor will no longer be zero,the rotor will spin down driving direction Turn up.To make single-phase acmotortrading.blogspot.com electric function automatically spin,we can add a starter in the stator winding,starting with the main windings in space by 90 degrees,starting Winding to concatenate a suitable capacitance,makes differ with on the phase of wholesalemotor.blogspot.com the primary winding current approximate 90 degrees,the so-called split-phase principle.These two are on time 90 degrees of electricity flow into motor lamination the two differ 90 degrees of winding on the space,will be produced in the space (two-phase) rotating magnetic field,under the effect of the rotating magnetic field,the rotor is Can automatic starting,after the start,to speed up certain,with the aid of an installed on the rotor of the centrifugal switch or other automatic control device will start winding disconnect,The only main winding work in normal working conditions.Therefore,starting winding can make short work.But there are a lot of time,starting winding is not broken,we induction motor refer to this Single-phase motor,motor for capacitive's turn to change this motor,can be achieved by changing the position of the capacitor is concatenated.
