TMS320F280025: Search for a driving solution for a single-phase motor

Yan Liu

hi expert,

Now I want to use the circuit that drives a three-phase motor to drive a single-phase motor, that is, to use the two U and V items of the three-phase motor driving circuit to form an H full bridge. By modulating, a bipolar PWM driving waveform is output to make the single-phase motor rotate.
Currently, we have achieved this function, but the speed loop and current loop are open-loop. The speed cannot be collected because our motor does not have sensors, and the current is collected through the terminal resistor.
Therefore, we would like to inquire if TI has a similar program that can be used as a reference. Even a program similar to V/F control that can help us improve the current closed-loop would be helpful.

best wishes,

Dannie

9 months ago

0 Yanming Luo 9 months ago

TI__Guru** 117270 points

You can still use the voltage or current control method as 3-phase motor with v/f or i/f control, but there is no a specific example for single-phase in motor control SDK.

0 Yan Liu 9 months ago in reply to Yanming Luo

Prodigy 220 points

hi, Yanming

You mentioned "You can still use the voltage or current control method as 3-phase motor with v/f or i/f control". Could you please clarify what exactly this means? Is it the case that the previously applied V/F control method for three-phase motors can be directly applied to single-phase motors?

0 Yanming Luo 9 months ago in reply to Yan Liu

TI__Guru** 117270 points

Yes. Just need to change the SVPWM for three-phase to SPWM for single-phase. You can search this on some of engineering website or motor control textbook for more details.

0 Yan Liu 9 months ago in reply to Yanming Luo

Prodigy 220 points

Thanks a lot!

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TMS320F280025: Search for a driving solution for a single-phase motor