How to choose a high temperature water pump? For the general purpose of the pump is not high temperature and only three-phase brushless DC can withstand high temperatures
Two-phase DC water pump:
Generally, the circuit board of the DC water pump (two-phase water pump) is built in the pump body, and then encapsulated with epoxy resin. The pump body has a certain temperature rise during operation, for example, the internal temperature of the pump when operating in a 20 degree environment. The rise will reach about 30 degrees, so the internal temperature of the pump is about 50 degrees. When the water pump is working at 60 degrees water temperature, the internal temperature is about 90 degrees, and the general electronic components have a temperature resistance level of 85 degrees and some can reach 125 degrees. Thus, if the internal temperature exceeds the temperature resistance level of the electronic components for a long time, the life and reliability of the water pump cannot be well guaranteed.
Three-phase DC water pump:
The three-phase DC water pump adopts sensorless technology, that is, it does not need to detect the position of the magnet and change direction by the sensor. The pump drive board is externally installed, and the pump body does not need any electronic components. The internal components of the pump body are all made of high temperature resistant materials. The pump controller is isolated from the heat source in a high temperature environment so that the pump body can be directly exposed to high temperatures and long-term use in high temperature environments.