CCS/TIDM-1000: Compensation Designer/Solution Adapter

Chris Rivers

Part Number: TIDM-1000

Tool/software: Code Composer Studio

We have been experimenting with a TIDM-1000 using a F28379D MCU board in order to develop our own 32KW power supply.

Using 3 different computers (CCS 10.1 & C2K DPSDK 3.01) and 2 different TMS320F2837D daughter boards we have had limited results getting the TIDM-1000 to work as expected following the design guide instructions.

We can run all 4 builds using a 3 phase autoformer wye connected variac with a neutral and the DC output connected to a Ohmweave adjustable resistive load, adjusted between 1K-500 Ohms.

Though we never see the power factor or output voltage stability meet the specified parameters in the documentation for any of the build configurations.

I am beginning to suspect we have a hardware problem with the TIDM-1000.

Yesterday we bypassed our variac and input 3 phase 208VAC directly from the mains without a neutral connection and ran build 4, with better results though still not meeting the documented specs.

See attached, where would we start if we need to troubleshoot the Vienna hardware? Any help is appreciated.

over 5 years ago

0 Chen Jiang ti over 5 years ago

TI__Genius 15935 points

Hi Chris,

Based on your pic, the power factor is around 0.998x which is not that bad(compared with table 4) under the load condition you tested(based on the pic). Could you provide more data if possible?

When you say output voltage stability, are you referring to voltage overshoot/undershoot during the transient? Do you have any waveforms or data?

Regards,

Chen

0 Chris Rivers over 5 years ago in reply to Chen Jiang ti

Prodigy 110 points

This is what Build 1 looks like powered from our variac.

0 Chris Rivers over 5 years ago in reply to Chris Rivers

Prodigy 110 points

This is Build 2 powered by our variac. Output voltage on our load never goes to 600VDC, stops around 535V and has low frequency oscillations dropping below 500V in build 2. Like the Vienna is turning off and on at low frequency or going in and out of regulation. This is with our resistive load set to 610 Ohms.

0 Chris Rivers over 5 years ago in reply to Chris Rivers

Prodigy 110 points

Yes the waveforms from my first post are much better for build 4 without using our variac. Though output voltage is still only 534.5VDC into our 610 Ohm load. This is a power analyzer capture with build 4 and no variac from today Build 4.