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Motor control kit touts fast BLDC motor spin

Posted: 14 Dec 2011     Print Version  Bookmark and Share

Keywords:Motor control kit  BLDC  Stellaris MCU 

Texas Instruments Inc. (TI) introduces the DK-LM3S-DRV8312, a new motor control kit that combines a 32bit Stellaris LM3S818 Cortex-M3 MCU and DRV8312 motor driver to spin sub-50V, 6.5A three-phase brushless DC (BLDC) motors in minutes.

 DK-LM3S-DRV8312

The DK-LM3S-DRV8312 motor control kit packs a 32bit Stellaris MCU and the DRV8312 motor driver.

The easy-to-use kit is said to be 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 InstaSPIN-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-electromagnetic field (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 start-up has been demonstrated over a wide range of conditions, including full torque.

Features and benefits of the Stellaris motor control kit:
 • The controlCARD module with Stellaris LM3S818 MCU features 50MHz performance, 64KB flash, 8KB SRAM and 6 PWM generators, allowing developers to create complex motion control designs with a tiny footprint.
 • DRV8312 motor driver provides the highest current output in its class, delivering up to 6.5A, without the need for a costly external heat sink. It is a reliable, fully protected motor driver with cycle-by-cycle over-current, over-temperature, cross-conduction and under-voltage protection, reducing design complexity and board space and ensuring higher system reliability.
 • Kit includes a 24V three-phase BLDC motor operating at up to 3.5A continuous.
 • Supporting software includes StellarisWare software with TI's IQmath Library for easy fixed to floating point conversion and InstaSPIN-BLDC software for quick and reliable motor start-up on any motor.
 • Accelerate system design with intuitive graphical user interface (GUI) powered by third party Crosshairs Embedded. Customise the existing GUI or create your own with easy drag and drop development by downloading Crosshairs Interface Designer.

The DK-LM3S-DRV8312 development kit is available immediately for Rs.13,000 ($299) at www.ti.com/stellaris-motor-pr-es. Those who have already purchased the DRV8312-C2-KIT, which includes the DRV8312 and C2000 Piccolo MCU, can swap out the existing controlCARD with the Stellaris LM3S818 controlCARD module for Rs.2,197.31 ($49) at www.ti.com/stellaris-motor-pr-es2.





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