Sensorless Field Oriented Control of BLDC Motors for MAVs
Abstract
To achieve longer flight duration of the microaerial vehicles (MAVs) it is needed to optimize their
propulsion system. A typical propulsion system of VTOL
(vertical take-off and landing) MAV consist of the propeller
BLDC (brushless DC) motor, motor controller and battery
(typically Lithium based chemistry). All these parts of the
propulsion system can be optimized in a specific way. In the
case of the propeller, this can be done by the optimization of
static and dynamic thrust performance. The motor
construction can be optimized by using lighter materials or
stronger rotor magnets. As for the battery - alternative
power sources like solar panels, hydrogen fuel cells etc. may
be used. We are focusing on the optimization of the motor
control part. In this paper, we are presenting synthesis of
the BLDC controller using the field oriented control
strategy which promises better performance in the
dynamical response of the propulsion system, lower power
consumption and generally higher efficiency in comparison
with the traditional six step commutation techniques.
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