Adding to its growing portfolio of motor control solutions, Texas Instruments announced a new motor control kit for spinning three-phase brushless motors with a Stellaris Cortex-M3 microcontroller. The new DK-LM3S-DRV8312 motor control kit features a 32-bit Stellaris LM3S818 microcontroller and DRV8312 motor driver to spin sub-50 V, 6,5 A three-phase brushless DC (BLDC) motors in minutes. The easy-to-use kit is a low-cost solution for high-volume motor control applications, including low-voltage fans, blowers, pumps, tools and compressors.
The Stellaris LM3S818 controlCARD module included in the kit has the required firmware pre-programmed in Flash memory to run TI’s new Insta-SPIN-BLDC solution out-of-the-box, along with other customer-developed applications, when plugged into the DRV8312 motor driver base board. The InstaSPIN-BLDC solution is an innovative and free back-EMF technique that spins any motor in seconds without knowledge of any motor parameters.
Unlike traditional back-EMF zero crossing techniques, InstaSPIN-BLDC extends sensorless operation down to lower speeds and exhibits high immunity to miscommutation caused by rapid speed changes. Reliable motor startup has been demonstrated over a wide range of conditions, including full torque.
The controlCARD module features 50 MHz performance, 64 KB Flash, 8 KB SRAM and 6 PWM generators, allowing developers to create complex motion control designs with a tiny footprint. The kit includes a 24 V three-phase BLDC motor operating at up to 3,5 A continuous. Supporting software includes StellarisWare with TI’s IQmath library for easy fixed to floating point conversion and InstaSPIN-BLDC software for quick and reliable motor startup on any motor.
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