Hi,

I recently got a BLDC motor used for i think centrifugal pump or something. When i opened it i saw that it only has 2 phases ( like an stepper) and a total of 6 coils . 4 wires ,2 for each coils endings.
I tried driving it with a tb6600 and it only partially worked i can move it 90 degree at a time but at a very slow speed.
My main problem is the circuit has 2 INT100S ICs and only four mosfet. So it should form only 2 half bridge. So then how is it driving 2 coils at a time . Without 2 full bridges .

Thank in advance

 

With only TWO phasesthat sounds alot more like a split capacitor motor. Does the tag state that it is a brushless DC motor??

 

Hi,

I recently got a BLDC motor used for i think centrifugal pump or something. When i opened it i saw that it only has 2 phases ( like an stepper) and a total of 6 coils . 4 wires ,2 for each coils endings.
I tried driving it with a tb6600 and it only partially worked i can move it 90 degree at a time but at a very slow speed.
My main problem is the circuit has 2 INT100S ICs and only four mosfet. So it should form only 2 half bridge. So then how is it driving 2 coils at a time . Without 2 full bridges .

Thank in advance

"4 wires ,2 for each coils endings." Sure they are not connected in 3 for star with a common (unconnected) neutral point? the 3 ends whould then feed the three coil sets.
i.e. making it a 3ph or BLDC operation.
Does it have permanent magnet poles?

 

Well i checked again and again and i am sure its not delta or star.
There are 4 output and 1-3 are connected and 2-4 are connected
And 1-2 and 3-4 aren't connected.
And yes it has permanent magnet poles in the casing (which rotates ).

I have attached new pics of complete circuit.

It has 3 ICs one of then is pic16 and other 2 are int100s and on back side there are 4 mosfet and one of shotky diode and other is transistor (i think).

It also has a hall effect but i broke it so its not in the image.

 

It also has a hall effect but i broke it so its not in the image.

How many Hall effect sensors?

 

Just one

How many Hall effect sensors?

Just one