Fever, acidproof alkali pump motor current is too high what reason be?

Resistance to acid and alkali water pump is strongly corrosive chemical water pump, generally have a fluorine plastic and stainless steel pump, acidproof alkali pump in use process, electrical heating is how to return a responsibility, current is too high what reason be? When the motor current is high, often in motor heating is serious, the following basic Outlines the cause of the motor current is too high; Let's have a look, what reason can lead to flow: a, load problem: load causes overheat the motor has the following kinds: 1, motor overload operation when the device does not form a complete set, the motor load power is greater than the rated power of the motor, the motor overload running for a long time ( The little horse cart) , can lead to overheating. Repair motor overheating, should first find out whether the load power and motor power, with the removal of blindness without a purpose. 2, drag operation equipment while supporting the mechanical load, but the mechanical load that drag don't work properly, the runtime loads when small, motor overload and fever. 3, drag the machinery fault when being dragged mechanical failure, the rotation is not flexible or stuck, will make the motor overload, causing the motor winding overheating. So the repair motor overheating, load factors cannot be ignored. Second, the power supply problem of power in the cause of the overheating in the motor, has the following kinds: 1, the power supply voltage is too high when the supply voltage is too high, the counter electromotive force of the motor, the magnetic flux and magnetic flux density increase. Due to the size of the iron loss and magnetic flux density is proportional to square of iron loss increase, lead to core overheating. And magnetic flux increasing, and the excitation current component has increased dramatically, due to the stator winding copper loss increase, make the winding overheating. Therefore, the power supply voltage exceeds the rated voltage of the motor, motor overheating. 2, unbalanced three-phase power source when unbalanced three-phase power, can make the unbalanced three phase current of the motor, causing winding overheating. By the visible, when motor overheating, should first consider the power of reason, Soft start, inverter, servo drives can also be regarded as the power supply) 。 Confirm the power aspects have no problem, then to consider other factors. 3, power supply voltage is too low power supply voltage is too low, if the electromagnetic torque of the motor remains unchanged, flux will reduce, the rotor current increases accordingly, load power component in stator current increase, caused by winding the copper loss increase, cause, rotor winding overheating. 4, asymmetric power supply voltage, when the power cord a phase circuit, the fuse fuse, or knife starting equipment led to a phase Angle head burns impassability, will cause single-phase, three-phase motor which run by large current of two phase winding overheating, and burned. Therefore, for three-phase motor generally does not apply to fuse protection. Three question 1 circuit, motor winding, motor itself when one phase winding break in the motor winding, or parallel branch has a branch circuit, will lead to unbalanced three phase current, overheat the motor. 2, motor coil connection error when a coil, the coil group or a phase windings to reverse, will lead to serious unbalance of three phase current and make the winding overheating. 3, the mechanical failure of the motor when the motor shaft bending, there was something wrong with bad assembly, bearings, etc. , all can make the motor current increases, the copper loss and mechanical friction loss increase, make the motor overheating. 4, motor winding short circuit when the motor winding short-circuit fault, short-circuit current is much bigger than the normal working current, make winding copper loss increases, cause the winding overheating, even destroyed. 5 star Angle, motor connection error when misconnect into star delta connection motor, motor full load operation, still more than rated current flows through the stator winding current, and even cause the motor to stop, if the shut down time is a bit long, not to cut off the power supply, winding is not only a serious overheating, will also be destroyed. Misconnect when star connection of motor into a triangle, or several coil string into a branch set of motor fault into two branch in parallel, will overheat the winding and iron core, serious when will burn winding. Four, motor vibration motor vibration may also cause a motor current is high, the cause and the treatment methods: rotor unbalance & ndash; — Leveling imbalance or balance pulley shaft stretch bending & ndash; — Check and correction of the motor is not aligned to the load axis & ndash; — Check the adjustment unit axis motor installed improperly & ndash; — Check installation and foot screws under the heavy load suddenly & ndash; — Lighten the load of five, ventilation, heat dissipation problems environment temperature is too high, the inlet air temperature is high. Debris blocking is air inlet, so that poor into the wind, causing little into the wind. Motor internal dust too much, the impact of heat dissipation. Fan damage or installed backwards, cause there is no wind or air volume is small. Not installed wind cover or inside the motor end cover not installed wind deflector, motor without a certain wind path. Six, repair the motor starting current motor problems repair more than 66%, frequent motor operating at the same time, also causes high current, motor overheating. Seven, wound rotor motor series resistance problem with concatenated resistor mismatch, such as frequent motor operating at the same time, also causes high current, motor overheating.
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