How to change the fan speed by varying its frequency?
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We have a fan in the air cooler here that provides a better condensation effect than designed; however, this leads to higher power consumption and reduces the temperature of the return fluid, resulting in steam waste. I would like to be able to adjust the speed of this fan’s motor. How should I do that? Should I turn to an electrical technician or an instrumentation specialist? How much will the cost of making corrections be?
Find an electrical engineer to replace the motor with an inverter-driven motor.
Agree with what was said above. As for the cost, it depends on the size of the motor, as well as the brand and size of the inverter used.
I agree with what was said above; it’s related to the power of your motor. If the motor generates a lot of heat, a dedicated variable-frequency motor is required.
Use variable frequency drive, or replace it with a low-speed motor. I wonder, why not use water cooling? Air cooling gives better results, doesn’t it?
A frequency converter is installed in front of the fan motor; it is recommended to use an imported frequency converter, and I found Siemens to be quite good.
Well, last year we worked on a project related to the variable frequency control of air cooler fans; we provided the electrical team with information specifying which fan motors required variable frequency control, giving exact details
What size motor? If it’s too small, it won’t be suitable for modification
What is the power rating? Variable frequency drives or hydraulic couplings can be used.
Installing a frequency converter on the fan is a feasible and relatively simple method; frequency converters are divided into high-voltage and low-voltage types. However, frequency converters are also prone to failure. There is another energy-saving and feasible method. The fan is driven by a turbine, and the speed of the fan is adjusted by controlling the flow rate of steam. Moreover, saturated steam can be used; the previous extraction-type steam turbine can be employed, and the motor at the other end of the fan can also be connected as a backup. This post was last edited by On the journey on 2009-4-17 16:58.]
Haha, we combine electrical equipment with instrumentation: the electrical equipment is responsible for the installation of frequency conversion cabinets and high-voltage systems, while the instrumentation handles the control systems and integration with the DCS
A electrical engineer should be consulted; adding an inverter cabinet will suffice, and the cost is not high.
For the up-conversion cabinet, have electrical and instrumentation teams work together on it.