During operation, the electrical machines transform the absorbed energy from the grid into a mechanical one. However, not all of the absorbed energy is transformed into useful one: the passage of the electricity in the coils, the magnetization of the magnetic circuit, the rotation of the machine and other minor phenomena contribute to the production of thermal energy resulting in loss of energy for the whole system.
Consequently, an adequate cooling system to keep the machine and the related insulating products within certain temperature limits is needed.
The easiest and common way to cool the machine is removing the heat by introducing air around the machine itself. For most electrical motors, their carcasses are equipped with air inlets and fans mounted directly on the motor shaft in order to increase the airflow.
In poultry and industrial environments there are many impurities. Pollen, in particular, is a highly aggressive substance that has insulating properties and therefore it makes the heat dissipation of the engines very hard.
Termotecnica Pericoli chooses to use, where possible, electrical motors without any cooling fan. This is only possible by positioning the motor in a particular area of the fan, where the cooling is guaranteed by the air flow produced by the fan itself.
This choice has been made by our technicians in order to protract the cleaning intervals: the use of electric motors with cooling fan - especially in aggressive environments like poultry sheds- involves a greater accumulation of dirt (especially close to the fan) and therefore a frequent maintenance.
Why an overheating of the components could be a problem for the fan electrical motor?
We have three main aspects to consider:
In conclusion, a clean electrical motor prevents failures and increase motor lifespan and, most important, the motor can reach the desired performance by consuming less energy, thus resulting in lower overall running costs.