Battery Eliminator Circuit

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A Battery Eliminator Circuit , abbreviated to BEC, is an electronic voltage control often used in RC model making and replaces (" eliminates ") a second battery. The aim is to ensure the power supply of the drive and the control with a single power source. Modern speed controllers ( Electronic Speed ​​Control , ESC for short) often have an integrated BEC. The BEC converts the input voltage (almost the same as the voltage of the motor outputs / motor output (often 7–24 V)) to 5 V. This voltage is necessary to operate the electronics (e.g. receiver and servos ). The output voltage can be fixed or adjustable.

An undervoltage protection switches off the drive or reduces its power if the battery voltage falls below a minimum, so that the supply of the servos and the receiver is ensured for a safe return to the model operator.

The integration of a BEC in the speed controller is more practical and at the same time less complex, on the one hand because of the additional cables required when using a battery, on the other hand because of the weight and space savings.