2 Description
The STEVAL-ESC001V1 electronic speed controller (ESC) evaluation board drives a single three phase
brushless motor with very high performance in sensorless mode (without position sensor).
It is designed to provide fast and efficient propulsion for remote control applications like electric cars, boats and
drones and is capable of low and very high speed regulation and strong dynamic response under different load
conditions.
An external signal via a communication bus between the board and a generic central unit sets the speed
regulation reference and another signal reports the status of the system, including faults, which the central unit
can use to trigger corrective events..
The same 6Step (or trapezoidal) control algorithm (often with no shunt resistors) drives the many different ESCs
offering various motor current, size and input voltages for remote control applications.
A more sophisticated control algorithm is used in the STEVAL-ESC001V1, based on field oriented control (FOC);
it features:
• better torque control
• motor current regulation in case of 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 typical system architecture pictured below shows individual ESC boards connected to single brushless
motors in a quadcopter system. An external Li-Po battery powers the four boards and a wired bus carries
communication between each board and an external unit such as a flight control board.
UM2197
Description
UM2197 - Rev 3
page 3/25
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