ALIEN POWER SYSTEM ESC Manuale - Pagina 6

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A NEW VERSION OF APS ESC IS THE SPORT 2 SENSORED MODEL.

Brushless ESC basically drive tri-phase Brushless motors by sending a sequence of signals for rotation.

The correct phase varies with the motor rotation, which is to be taken into account by the ESC. Some of

them (Sensorless) use back EMF (electromotive force) created by the motor to give current to two

phases and start the motion. The back EMF is directly proportional to the motor speed so this makes it

difficult for the ESC to detect the rotor position when stationary or at low speed. The result in most

cases is a lower torque on the startup, more noise at low rpm and poor low-speed driveability. Also at

high speed with a fast change of rpm the ESC can lose sync and it's possible to damage the ESC itself.

Other controllers use magnetic sensors (in sensored controllers) or optical detectors.

In the Sensored controllers, what the sensor does is comunicate to the ESC the exact position of the

rotor. The ESC uses this info to start the rotor spinning perfectly without having to 'guess', so it can

precisely send voltage and energise the exact coils at the exact time when they need to be energised.

This results in a smoother power, better low-speed driveability and more torque particularly noticeable

This ESC is recommended for E-bike systems because an E-bike requires high initial torque.

Make sure to connect the phases and the sensors wire in the right sequence( blue-blue, green-

green, yellow-yellow). A wrong connection will damage the controller and invalidate the guaranty.

Sensored pin illustration: Pin 1 = Ground -

Pin 2 = Phase C Pin 3 = Phase B Pin 4 = Phase A

Pin 5 = Temperature control Pin 6 = Positive + 5V (+/- 10%)

ALIEN POWER SYSTEM SENSORED ESC.

in lower rpm.