Description - STMicroelectronics B-G431B-ESC1 User Manual

UM2516
4

Description

The B-G431B-ESC1 Discovery kit is an electronic speed controller (ESC) that drives a
single 3-phase brushless motor with very high-performance control. It is commonly used
inside the R/C field, for instance, drones, electric cars, and boats, to provide fast and
efficient propulsion for the movement. This unit must be capable of low- and very high-
speed regulation and strong dynamic response to different load conditions. An external
signal, through a communication bus between the ESC board and a generic central unit,
sets the reference value for the speed regulation, and another signal sends the status of the
system. For instance, if a fault occurs, a central unit can decide to enable an emergency
procedure.
In the mass market, a lot of ESCs are available to cover different kinds of R/C models, from
the toy up to the professional unit, with different motor current capabilities, different sizes,
and input voltage requirements. All of these boards are based on the same control
algorithm, 6-step or trapezoidal, with no shunt resistors in a lot of cases.
B-G431B-ESC1 performs otherwise more sophisticated and smart control algorithm based
on Field Oriented Control (FOC) comparing with the 6-step algorithm, in particular, it offers
the following features:
•
Better torque control
•
Motor current regulation in case of a fast load change
•
Vibration reduction
•
Active braking function
•
Better efficiency
•
Noise reduction
• A real-time monitor of the rotor speed
•
Energy recovery during the deceleration
The Discovery kit is also compatible with the 6-step control with embedded Bemf hardware
circuit for rotor position estimation.
UM2516 Rev 4
Description
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