Brushless DC pump protection measures
Brushless DC pump protection 1. When the driven parts of the magnetic actuator in overload conditions, the driven parts of the magnetic actuator will slip on the shaft, effectively protecting the motor.
2. Pump operation, you must use a small amount of liquid on the inner rotor and the isolator between the annular region and the sliding bearing friction pair was washed and cooled. Coolant flow is typically 2% to 3% of the pump design flow, and the annulus area between the inner magnet rotor and the isolation sleeve generates high heat due to eddy currents. When the cooling fluid is not enough or flushing hole poor, blocked, it will lead to the medium temperature is higher than the permanent magnet operating temperature, the magnetic rotor gradually lost magnetism, the magnetic actuator failure. When the medium is water or water-based liquid, the annulus area can be maintained at 3-5 ℃. When the medium is hydrocarbon or oil, the annulus area can be maintained at 5-8 ℃.
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