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MCUs boast sensorless motor control tech

Posted: 27 Aug 2013 ?? ?Print Version ?Bookmark and Share

Keywords:Texas Instruments? motor control technology? InstaSPIN-FOC? C2000 Piccolo F2802x? MCU?

Texas Instruments (TI) has integrated its InstaSPIN-FOC (field-oriented-control) sensorless motor control technology to its most affordable, real-time-control C2000 Piccolo F2802x MCU series. According to the company, engineers can use the technology, embedded in the read-only-memory (ROM) on the MCUs to speed up motor control development while improving efficiency for cost-sensitive brushless DC (BLDC), permanent magnet (PMSM) and AC Induction motor based applications.

With the ability to identify, tune and control any type of three-phase, synchronous or asynchronous motor in just minutes, TI's Piccolo F2802x MCUs with InstaSPIN-FOC are intended for applications such as washing machines, compressors, pumps, fans, electric bicycles, tools, treadmills, compact drives, sewing and textile machines, lifts and hobby motors. Prior to the launch of TI's InstaSPIN-FOC technology, sensorless FOC was out of reach for most developers because existing sensorless algorithms were not robust enough over real application conditions and were challenging to implement into a complex control system, adding months of development time. InstaSPIN-FOC technology addresses those concerns by reducing system complexity for designers of all levels while improving motor efficiency, reliability and performance at an affordable price point, continued TI.

The Piccolo F2802x MCUs with InstaSPIN-FOC technology is available to a range of motor designers with the 48-pin package, 32KB or 64KB of Flash for about $2 for high volume applications. It helps save months of design time with nearly fully automated motor parameter identification, software observer tuning and torque control tuning, the firm stated. The device also comes with an interactive InstaSPIN-FOC online simulation tool. Designers can assess TI InstaSPIN-FOC capability by customising speed and load profiles on a variety of motors and obtain simulation results within minutes.

The solution boasts a near encoder performance with embedded on-chip FAST observer algorithm, which through only analysis of currents and voltages, calculates a reliable and robust estimation of rotor flux, angle, speed and torque across use conditions. Accurate, sensorless estimator performance eliminates the need for a physical sensor in nearly all torque and velocity applications, added TI. The devices also allows the user to accommodate all three-phase motors, synchronous (BLDC, SPM and IPM) and asynchronous (ACI) with the same solution.

The MCUs with InstaSPIN-FOC technology also also eases the development and evaluation using the new motor control library (modules, drivers, system examples, documentation) through MotorWare, which offers the latest in C object-oriented and API-based coding techniques and over a dozen lab based projects that let you explore the features of InstaSPIN-FOC, including; Motor ID, saving motor parameters, torque control, tuning speed controller, run-time resistance monitoring, field weakening, modulation techniques and PowerWarp, detailed the company.

Piccolo F28026F and F28027F MCUs with InstaSPIN-FOC are available in mass quantities and start at $4.03 in 10 K unit orders. The InstaSPIN-FOC online simulation tool is available for free. Developers can evaluate the solution using the $69 modular controlCARD (TMDSCNCD28027F), now included in the $699 TMDSHVMTRINSPIN high voltage (50-350V, 10A) motor kit, which can be paired with an external emulator for use with the previously released low voltage inverter evaluation modules (DRV8312/DRV8301 RevD).





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