What is the reason why the water in the water resistor of a high-voltage wound rotor motor boils during operation?
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What is the reason why the water in the water resistor of a high-voltage wound rotor motor boils during operation?
The load is heavy, the starting current is high, and the ambient temperature is high
Every time it is started, the liquid temperature rises, and since the water tank is made of plastic and does not dissipate heat well, it cannot be started frequently; moreover, if the amount of liquid is too low, it needs to be replenished.
Reply to 2# lzs771010: 1. If the resistance value of the water resistor increases, chemicals need to be added. 2. Frequent activation of the water resistor will cause it to heat up. 3. Excessive load, which causes a large voltage drop across the water resistance, can also lead to heating (including the possibility of mechanical issues that increase resistance).
The water resistor only causes a temperature rise when the motor starts; it is not used during normal operation. I think the problem is caused either by too many startups of the motor, or by the use of a water resistor with insufficient capacity