Do you know why the vacuum pump motor temperature is too high? Dalan Motor Xiaobian gives you an explanation:
First, the reason for the high temperature of the vacuum pump
(1) The motor has large power, large working current and large heat generation.
(2) The fan speed is low, the wind pressure and the air volume are small.
(3) The number of fan blades is small and the amount of wind generated is small.
(4) The motor is attached with dust and oil to reduce heat dissipation.
(5) The bus voltage of the vacuum pump motor is 380V. Due to the cable voltage drop and uneven load distribution, the actual applied voltage of the motor is only 365V, resulting in low voltage and large running current.
Second, the vacuum pump high temperature countermeasures
The motor power and speed are matched to the vacuum pump and cannot be changed. The fan is mounted on the motor spindle. The motor speed determines the fan speed and cannot be replaced. Although increasing the number of fan blades can play a certain role, but the number of blades increases, the dynamic balance is not easy to find. If the correction is not good, the motor vibration will increase.
(1) The original fan cover is lengthened by 40cm and an axial fan with the same diameter as the fan cover is installed inside. The axial fan motor power is 850W, the speed is 1489r/min, the voltage is 380V and the original fan continues to be retained. The axial flow fan is additionally provided with one power supply control, and the axial flow fan is not interlocked with the main motor. After the vacuum pump is started, the axial fan is started in time, and the axial fan is stopped 30 minutes after the vacuum pump is stopped to fully cool the main motor.
(2) Regularly remove dust from the motor to keep the motor heat sink clean and increase its heat dissipation capability.
(3) Adjust the bus voltage of the vacuum pump to 400V.
Third, the effect of high temperature vacuum pump
(1) Due to the high speed of the axial flow fan, large wind pressure and large cooling effect, the main motor temperature drops by 12 °C under the same ambient temperature and load current, and the summer main motor temperature does not exceed the limit.
(2) The axial flow fan can be artificially controlled. After the main motor is stopped, the axial flow fan can still operate to fully cool the main motor.
(3) Try to balance the load distribution of the two busbars as much as possible to prevent excessive voltage drop due to excessive load on a certain busbar.
(4) After the voltage is adjusted, the diaphragm pump running current is reduced to 210A and the heat is relatively reduced.
(5) Slowing down the insulation aging speed of the main motor and prolonging its service life.
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
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