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Cause analysis of micro water pump power for motor overheating
Agricultural water pump belongs to a miniature water pump, is the main kind of summer sowing the rural domestic water and spring irrigation machinery.Will happen in the process of using the pump to avoid damage of different degrees of failure problem, to the normal pump cannot be used for pumping.Pump power for motor overheating is a common problem.That this is what causes, how to solve?
Pump power is usually caused by overheating has the following four reasons:
One is the power problem.Voltage is high or low, under certain load, the voltage range change in ratings of + 10% to - 5%, it may cause overheating;Asymmetrical three-phase voltage, three-phase electric voltage and unbalanced degree is more than 5%, will lead winding overheating;Lack of phase operation, experience shows that agricultural motor burned down more than 85% are caused by lack of phase operation, motor protection device installation phase.
The second is the pump reasons: choose power don't match, a small cart, electric machine long time overload running, make the motor temperature is too high;Start too frequently, quota of short-time or intermittent duty of motor, continuous work.Start times should be limited, correctly chooses thermal protection, according to the motor on the calibration of the norm.
3 it is the cause of the motor itself: connection error, make motor temperature rise rapidly;Stator winding turn-to-turn short circuit or local interphase short circuit, grounding, partial light when motor overheating, serious when insulation burn out;The rotor broken bar or flaws, motor run 1 to 2 hours, core temperature rising rapidly;Ventilation system failure occurs, should check whether the fan is damaged, the direction of rotation is correct, vent blockage;Bearing wear, swept rotor eccentricity chamber makes the stator iron core facies to wipe a clang, core temperature rising rapidly, serious when motor smoke, even coil burned.
Four is the work environment reasons: motor winding be affected with damp be affected with damp or dust, oil and other adhesion on the winding, results in the decrease of insulation.Solution: should measure the insulation resistance of the motor, and cleaning and drying process;The environment temperature is too high.When the environment temperature more than 35 ℃, inlet air temperature is high, can make the temperature of the motor is too high, should try to improve their working environment.
Pump power is usually caused by overheating has the following four reasons:
One is the power problem.Voltage is high or low, under certain load, the voltage range change in ratings of + 10% to - 5%, it may cause overheating;Asymmetrical three-phase voltage, three-phase electric voltage and unbalanced degree is more than 5%, will lead winding overheating;Lack of phase operation, experience shows that agricultural motor burned down more than 85% are caused by lack of phase operation, motor protection device installation phase.
The second is the pump reasons: choose power don't match, a small cart, electric machine long time overload running, make the motor temperature is too high;Start too frequently, quota of short-time or intermittent duty of motor, continuous work.Start times should be limited, correctly chooses thermal protection, according to the motor on the calibration of the norm.
3 it is the cause of the motor itself: connection error, make motor temperature rise rapidly;Stator winding turn-to-turn short circuit or local interphase short circuit, grounding, partial light when motor overheating, serious when insulation burn out;The rotor broken bar or flaws, motor run 1 to 2 hours, core temperature rising rapidly;Ventilation system failure occurs, should check whether the fan is damaged, the direction of rotation is correct, vent blockage;Bearing wear, swept rotor eccentricity chamber makes the stator iron core facies to wipe a clang, core temperature rising rapidly, serious when motor smoke, even coil burned.
Four is the work environment reasons: motor winding be affected with damp be affected with damp or dust, oil and other adhesion on the winding, results in the decrease of insulation.Solution: should measure the insulation resistance of the motor, and cleaning and drying process;The environment temperature is too high.When the environment temperature more than 35 ℃, inlet air temperature is high, can make the temperature of the motor is too high, should try to improve their working environment.
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