How to use the cooling method for the inverter motor
According to the specific load characteristics, the variable frequency speed regulating motor usually adopts several cooling methods such as IC411, IC416, IC611, IC616, IC666, IC86W, etc. The sensible and reasonable solution is: according to the specific situation, the cooling method is reasonably selected, which not only has low purchase cost, Operating costs will also be significantly reduced.
● Constant torque load
The load characteristics are constant torque below the base speed and constant power above the base speed. That is, during low-frequency starting and low-frequency operation, the variable frequency motor still outputs a large torque (rated torque). At this time, if the fan is cooled (such as IC411 and IC611), the speed is low and the cooling condition is used. Deterioration, motor heating is very serious, it is necessary to add an independent forced cooling fan to the motor to ensure safe operation of all frequency bands.
● Fan, pump load
When the load of the variable frequency speed regulating motor is the load of the fan and the pump, the load torque varies with the square of the rotational speed (TL∝n2). The load torque is small at low speed operation, the output power of the motor shaft is very low, and the heat generation is also small. There is no need to worry about the heat dissipation problem of the variable speed motor at low speed. You can use the internal and external fan cooling methods IC411 and IC611, which is the theoretical basis for J to introduce the IC611 motor to customers.
in conclusion
When selecting the variable frequency speed regulating motor, it is necessary to reasonably select the cooling method of the variable frequency speed regulating motor according to the difference between the driven load characteristics and the use environment. Only in this way can the safe and economic operation of the variable frequency speed control motor be guaranteed.
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