FAQ: How Does The Bec Affect The Motors?

What does a BEC do?

A BEC is (usually) a switching voltage regulator that turns on and off very rapidly so as to allow only the necessary amount of energy through at a time. This allows for high efficiency BECs that can supply high amounts of power, and even have output voltages higher than the input voltages.

Do I need an external BEC?

To a point that your Rx cannot function properly and goes brown out. So you need a voltage regulator (what a external BEC essentially is) to provide sufficient current and voltage (hence power) to the servo.

What is the difference between ESC and BEC?

ESC stands for Electronic Speed Controller. It converts the PWM signal from the flight controller or radio receiver, and drives the brushless motor by providing the appropriate level of electrical power. BEC stands for Battery Elimination Circuit. UBEC stands for universal BEC or sometimes ultimate BEC.

Do I need a BEC for my servo?

Unless the servo draws a huge amount of current, an external BEC is not needed. IF the ESC does not have a built in BEC, then one should be wired from the battery into the battery port on the RX powering both the ESC and servo as well as the RX.

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What is the purpose of a BEC in RC?

CC BEC (Battery Eliminator Circuit) is a small device that eliminates the need for a receiver battery. It draws voltage from the motor batteries and drops it to a voltage level that is suitable for your receiver and servos.

What does switch mode BEC mean?

The other common type of BEC is the Switching BEC. This type uses a small FET transistor to switch the voltage from the battery pack on and off very quickly, around 150,000 times per second, and then filter this output through an inductor and capacitor to smooth out the ripple to produce a steady DC voltage.

What are the 3 wires on a servo?

The servo has three wires: power, ground, plus a third wire to carry the command pulses.

What does Ubec stand for?

Defining UBEC A UBEC ( universal battery eliminator circuit ) is purely a device that converts high-voltage (such as 25V from a 6S LiPo) to lower voltages to allow the full UAS to be powered from one primary battery source.

Why do we use a battery eliminator?

A battery eliminator is a device powered by an electrical source other than a battery, which then converts the source to a suitable DC voltage that may be used by a second device designed to be powered by batteries. A battery eliminator is also effective in replacing obsolete battery designs.

What is BEC voltage on ESC?

A BEC is basically a step down voltage regulator. It will take your main battery voltage (e.g. 11.1 Volts) and reduce it down to ~5 Volts to safely power your receiver and servos.

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What is a high voltage servo?

The specs of a servo (speed and torque) increase with voltage, so at higher voltages you get stronger, faster performance. Some receivers can handle voltages higher than 6 volts too. So, in that situation, you send 7+ volts through your receiver to your servo.

How does a battery eliminator circuit work?

It works by using a switching, alternating current to step down your battery voltage to a safe 5v for your RC gear. Virtually no power wasted by the SBEC and you can still run large amounts of power through it.

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