Hello, I would like to repair this brushless 12V fridge compressor motor (Danfoss 2.5) but first of all understand how it functions.
Inside are 3 coils.
It has an electronic driving unit: 2coils (photo 3)pin1-pin3 and pin3-pin4 of them are driven by mosfets. Total number of mosfets=3:
(the third one is for the fan). There is no mosfet driving the coil between connectorpin 2 and 3 ("WT" on PCB).
I add a diagram (temptative).
![IMG_20201025_124934[1].jpg IMG_20201025_124934[1].jpg](https://forum.allaboutcircuits.com/data/attachments/208/208318-1b71fb94cb4fe69fa7fa095a7a6fa4ca.jpg)
![IMG_20201019_113527[1].jpg IMG_20201019_113527[1].jpg](https://forum.allaboutcircuits.com/data/attachments/208/208316-48a625727ebda99d1d15f3af64608d5f.jpg)
Inside are 3 coils.
It has an electronic driving unit: 2coils (photo 3)pin1-pin3 and pin3-pin4 of them are driven by mosfets. Total number of mosfets=3:
(the third one is for the fan). There is no mosfet driving the coil between connectorpin 2 and 3 ("WT" on PCB).

![IMG_20201025_124934[1].jpg IMG_20201025_124934[1].jpg](https://forum.allaboutcircuits.com/data/attachments/208/208318-1b71fb94cb4fe69fa7fa095a7a6fa4ca.jpg)
![IMG_20201019_113527[1].jpg IMG_20201019_113527[1].jpg](https://forum.allaboutcircuits.com/data/attachments/208/208316-48a625727ebda99d1d15f3af64608d5f.jpg)
Last edited: