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How to determine the rotor flux of a PMSM motor?

Dear all,

I'm in the initial phase of a motor control project. Because I want to get motor parameters to put in a simulation model (using PLEC Standalone or Simulink) to evaluate and design a servo drive system before I have a physical system. Although, I've ordered some development kits from TI (such as: BoostXL-DRV8305 + LaunchPad-F28069M) as well as PM motors for testing control algorithms (such as: Anaheim's BLY174D-24V-4000, Teknic's M-2321S-LN-04D and Ketterer's T-Rex-I-65-3206).

So that I  have a question is whether I can determine the rotor flux of a PMSM/IPM motor from their datasheet or which method can I use to get the rotor flux (permanent magnet rotor) when I have the motors in hand? 

Below is some datasheets of the available motors which I have:

1. Anaheim's BLY174D-24V-4000 : 3323.L010228 - BLY17 Series Product Sheet.pdf

2. Teknic's M-2321S-LN-04D : 5270.N23_Industrial_Grade_Motors_v6.3.pdf

3. Ketterer's T-Rex-I-65-3206 : 3206-bldc-torque-motor-en.pdf

Thank you for your help in advance!

PS: I will check TI's motor ID after I receive the Development Kits from TI in the 2~3 next weeks, while waiting for these items I want to design by simulation in advance. However currently I have had the motor in hand already.