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Drone flight time and battery life to be improved

Two circuit-based subsystem reference designs will help manufacturers add flight time and extend battery life to quadcopters and other non-military consumer and industrial drones, according to Texas Instruments.

The 2S1P battery management system (BMS) reference design transforms a drone’s battery pack into a smart diagnostic black box recorder that monitors remaining capacity and protects the Li-ion battery throughout its lifetime.

Designers can use the drone BMS design to add gauging, protection, balancing and charging capabilities to any existing drone design and improve flight time.

Leveraging the bq4050 multi-cell Li-ion fuel gauge to measure remaining capacity over the battery’s lifetime, the BMS design also features the bq24600 battery charge controller and a DC/DC converter.

The sensorless high speed field oriented control reference design for drone electronic speed control helps electronic speed controllers achieve the highest possible efficiency with performance for speeds of more than 12000rpm or 1.2kHz. The design includes fast speed reversal capability for more stable roll movement.

The design features the InstaSPIN-FOC C2000 solution, including an F28027F MCU for precise motor control and FAST field observer proprietary software algorithm that estimates the rotor flux, angle, speed and torque. Motor parameter information is used to tune the current control bandwidth.

The FAST sensorless observer algorithm is self-tuning, requiring no adjustments for proper operation and propeller control. The design also includes a 60V LMR16006 SIMPLE SWITCHER DC/DC converter.

Peggy Lee

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