I am designing a driver for a sensorless bldc motor and I have found these two types of motor configurations. I attach images.
Img 1:
Img 2:
Both are bldc sensorless motors?
How can I know the difference between one physically?
If the 3 power cables and 3 smaller ones come out of a motor, are we talking about the configuration of image 2 and if only 3 of the configuration of image 1 come out?
Q: Both are bldc sensorless motors?
A: No, only the first one is a sensorless BLDC motor. The motor in image 2 has three Hall sensors (the ones enclosed in your red circle), thus it's not sensorless.
Q: How can I know the difference between one physically?
A: If you were to open up a sensored BLDC motor you will find three Hall sensors inside. A sensored BLDC motor also has 3 "small" cables for the signals of the Hall sensors, whereas a sensorless BLDC motor has only the three "thick" power cables.
Q: If the 3 power cables and 3 smaller ones come out of a motor, are we talking about the configuration of image 2 and if only 3 of the configuration of image 1 come out?
A: Exactly
By the way, if you're designing a sensorless inverter you don't need to use the Hall sensor signals, you can just only ignore them.
