TIDM-1000: Vienna Rectifier - step down

Danilo A.

Part Number: TIDM-1000

Hi Team,

We received this inquiry from our customer.

Would like to inquire about the TIDM-1000 eval brd.

One of the designed outputs for this eval brd is 600 V with a 3 phase 208 Vrms Line to Line or 120 Vrms Line to Neutral input.

Have noticed much of the calibration and instruction is based on the 120 Vrms Line to neutral value.

What would be the lowest output voltage that could be designed for with this topology?

Would it be based off of the pk of the Line to Neutral or Line to Line voltage?

If it is desired to lower the VBus what is the best way to go about doing this if this is possible?

Does TI have a topology for a "Buck" version of the Vienna Rectifier?

Regards,

Danilo

over 3 years ago

0 Chen Jiang ti over 3 years ago

TI__Genius 15935 points

Hi Danilo,

TI does not have a "buck" version of Vienna rectifier. Usually it is boost type converter for Vienna rectifier.

In term of the min Vout, it should be based on the input line to neutral voltage. And the min value is achieved when "boost" part is not enabled which is when it behaves like a bridge rectifier.

Regards,

Chen

0 Danilo A. over 3 years ago in reply to Chen Jiang ti

TI__Mastermind 30870 points

Hi Chen,

Thank you for your comment. Our customer has follow up inquiries below.

OK, thank you for the response and information!
Is there a way to just load half of the Vbus? I am after 275 V out (Vin 120 Vrms LN). is it possible to set Vbus to 550V? Is this done by just changing the Vsense? What would be the best approach to lower Vbus out? Could I then just load the Vbus_PM half? Or is it critical to load the the full Vbus?
Will this topology also work with VAC @ 400Hz?

Regards,

Danilo

+1 Chen Jiang ti over 3 years ago in reply to Danilo A.

TI__Genius 15935 points

Hi Danilo,

I think it is probably achievable. You can double confirm by searching for voltage gain of bridge rectifier.

And if the gain is fine, you can change the Voltage output reference in the code. It does not have to the exactly the full Vbus.

For 400Hz, pls refer to the thread below.

https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/969584/tidm-1000-to-operate-tidm-1000-at-input-line-frequency-400hz

Regards,

Chen

C2000™︎ microcontrollers

C2000 microcontrollers forum

TIDM-1000: Vienna Rectifier - step down