How the position sensor less PMSM drive starts ?

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Ali Abdul Razzaq Altahir

Using alpha-beta transformation

Vatan Mehar

You can use the current injection technique wherein you push some d axis current and provide your own angle to perform the transformations. The angle should vary slowly so that the synchronization between the rotor pole and stator pole is not lost, also the machine shouldn't have any load. Later on, as the machine picks up speed you can switch on to any back-emf based sensorless control strategy.