TI E2E Community
Motor Drivers Forum
Alignment Algorithm in InstaSPIN BLDC solution
The knowing or detection of inital position of BLDC motor in InstaSPIN BLDC solution or the existing current BLDC zero-crossing solution is very important for customer.
Unfortunatly I could not find out any clues about Alignment in opened source code in Control suite.
Could you guide me about alignment algorithm or detection initial motor postion at TI motor application?
There is no initial rotor detection done. it just begins force commutation. The Bemf Integration technique can lock on very quickly to close the commutation loop. There is an advanced start-up feature which controls the ramp rate and allows you to choose how many successive good commutations should occur before you close the commutation loop.
video player: Learn how to use...forward to the Advanced Start-up
Thank you for your prominent explanation.
Do you think there is no need for Alignment algorithm to customer if customer used the InstaSPIN BLCD solution?
Because I asked you some customers requested the need for the information of initial postion in their application.
How can we overcome if there is no alignement algorithm in InstaSPIN BLDC?
That is application dependent. MOST applications should not require, but it depends on the # of poles in the motor and how much (if any) reverse direction is allowed at start-up.
For a high pole motor (like an e-bike) in worst case mis-alignment, the possible initial reverse to proper commutate will mean the bike moves less than <1" backwards, so that could be acceptable. For a two pole motor connected to a gear box, that may be completely unacceptable.
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