Compact cooling for the model assembly sector

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Compact cooling for the model assembly sector

Powerful speed controllers have been in use in the model assembly sector for many years, not only in RC model aircrafts and helicopters but also in ships and vehicles.
These extremely compact and lightweight controllers fulfil two functions in model assembly: in order to avoid having to pack one battery for the drive and a further battery for supplying the receiver into the model, the speed controller bundles both tasks. On the one hand a so-called BEC (battery eliminator circuit) is supplied to ensure the control function and on the other hand the considerably more power-hungry part of the powertrain that usually ends in a powerful, brushless motor. As a rule both are powered by LiPo cells that can supply high currents.

In the new Kolibri controller series by Kontronik, the most powerful workhorse that can supply up to 140A continuous current in the powertrain was equipped with heat sinks and SEPA fans.
In model assembly it cannot always be guaranteed that the controller can be mounted in the airflow, e.g. in surface models. Controllers e.g. in helicopters or drones when hovering may have thermal problems. The worst case scenario would result in a functional control failure. In addition to the internal control measures, the ingeniously integrated complete cooler comprising an aluminium finned heat sink with an attached MFB30E05 fan with a height of only 6.5 mm provides the necessary remedy. The compact cooling contributes to the fact that the entire controller still has the model assembly-friendly, extremely narrow dimensions of 77x23x36 mm.