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Appendix A Definition of Terms and Acronyms

ACIM — Alternating current induction motor.

CCStudio — Code Composer Studio.

FAST — Unified observer structure which exploits the similarities between all motors that use magnetic

flux for energy transduction, automatically identifying required motor parameters and providing the

following motor feedback signals:

• High-quality Flux signal for stable flux monitoring and field weakening.

• Superior rotor flux Angle estimation accuracy over wider speed range compared to traditional

observer techniques independent of all rotor parameters for ACIM.

• Real-time low-noise motor shaft Speed signal.

• Accurate high bandwidth Torque signal for load monitoring and imbalance detection.

FOC — Field-oriented control.

Forced-Angle — Used for 100% torque at start-up until the FAST rotor flux angle tracker converges

within first electrical cycle.

InstaSPIN-FOC — Complete sensorless FOC solution provided by TI on-chip in ROM on select devices

(FAST observer, FOC, speed and current loops), efficiently controlling your motor without the use of

any mechanical rotor sensors.

IPM — Interior permanent magnet motor.

Motor Parameters ID or Motor Identification — A feature added to InstaSPIN-FOC, providing a tool to

the user so that there is no barrier between running a motor to its highest performance even though

the motor parameters are unknown.

PI — Proportional-integral regulator.

PMSM — Permanent magnet synchronous motor.

PowerWarp™ — Mode of operation used for AC induction motors (ACIM) that allows minimum current

consumption.

Rs-Offline Recalibration — InstaSPIN-FOC feature that is used to recalibrate the stator resistance, Rs,

when the motor is not running.

Rs-Online Recalibration — InstaSPIN-FOC feature that is used to recalibrate the stator resistance, Rs,

while the motor is running in closed loop.

SVM — Space-vector modulation.

Definition of Terms and Acronyms SPRUHP4–August 2013

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