Has anyone used the reference code for sensorless vector control from TI?
I used the code ACIM4 from TI, the motor can track the speed well but when it is subjected to a torque step, the speed dropped and cannot be regulated, has anyone got similar experience?
My recommendation would be to start with the latest code from our Sensorless FOC PMSM Motor Control Kit.
Install the following:
Once installed there is a note in the documentation
that states the following for ACI Motors:
Q - Can I run an induction motor using the multi-axis board?A - Yes. The code in the multi-axis package is developed for PM motors; therefore theuser needs to replace the PM motor specific modules with the induction motor specificmodules. All of these modules are included in Digital Motor Control Library which can bedownloaded from the following link:http://focus.ti.com/docs/toolsw/folders/print/sprc215.html .The incremental build strategy followed for multi-axis motor is similar to the PMSM3-2(28x) project provided on the digital motor control webpage:http://focus.ti.com/mcu/docs/mcuorphan.tsp?contentId=51397 .In order to implement sensorless control of an induction motor using the same board,the user need to follow the incremental build strategy of ACI3-4 (28x) and replace PMsensorless modules with the necessary modules provided in this package. Thedifferences in the projects can easily be seen by comparing the block diagrams found inthe system document pdf files in the project folders.
I'm also not sure which hardware platform you are using or how you went about tuning any of the modules for your specific motor.
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