electronicsLearner77
- Jul 2, 2015
- 277
- Joined
- Jul 2, 2015
- Messages
- 277
I am really confused with phase currents direction of flow, please help to understand i am referring to the below link phase current flow
and referring to the diagram

and i am using the 3 shunt topology, my main question is if you are using the FOC and SVPWM used we will be imposing the sine currents on the U,V,W terminals.

During the initial duration Phase1 and Phase3 is positive and hence the current will be flowing from the inverter to the windings and this happens according to me when the top Mosfet is ON. But the three phase current sensing can only be done when the low mosfet is ON. As per the 1st diagram the current still flows from the Mosfet to the windings even if the high Mosfet is Off and the low Mosfet is ON. I am just not able to understand this. I am just pasting the diagram again to show the ground

I feel like the current is flowing from ground to the windings. I am not clear on this. Please advise.
and referring to the diagram

and i am using the 3 shunt topology, my main question is if you are using the FOC and SVPWM used we will be imposing the sine currents on the U,V,W terminals.

During the initial duration Phase1 and Phase3 is positive and hence the current will be flowing from the inverter to the windings and this happens according to me when the top Mosfet is ON. But the three phase current sensing can only be done when the low mosfet is ON. As per the 1st diagram the current still flows from the Mosfet to the windings even if the high Mosfet is Off and the low Mosfet is ON. I am just not able to understand this. I am just pasting the diagram again to show the ground

I feel like the current is flowing from ground to the windings. I am not clear on this. Please advise.