Comments on: Fast Power Converters and Rapid Digital Design

By: OMAR ELLABBAN

OMAR ELLABBAN — Fri, 04 Jun 2010 10:09:30 +0000

please, can i have the complete PhD thesis?
thanks in advance

By: maher

maher — Tue, 16 Mar 2010 20:02:03 +0000

Dear Grant,
Is there other new link for UIUC Wiki? or link for calibrate the sensor using DSP

Regards

By: Grant Pitel

Grant Pitel — Sun, 21 Feb 2010 22:02:29 +0000

The shunt resistor is a a series resistor. The term shunt is special type of resistor intended just for measuring current. Shunts are typically rated using a current and voltage across the shunt at a rated current (rather than ohms). Shunts also have lower temperature coefficients to ensure consistent measurements.

By: Maher

Maher — Tue, 16 Feb 2010 15:18:14 +0000

Hi Dr. Grant,

Please can you send me other link to access the link of calibration techniques for current sensor, because I can’t open the link of UIUC Wiki.
Also, I would ask why you said shunt resistor, however you connected it in series with L and then measure the voltage across it by amplified it using the instrumentation amplifier? I think it is series restore not shunt restore?

By: Maher

Maher — Tue, 16 Feb 2010 15:17:14 +0000

Also, I would ask why you said shunt resistor, however you connected it in series with L and then measure the voltage across it by amplified it using the instrumentation amplifier? I think it is series restore not shunt restore?

By: Maher

Maher — Tue, 16 Feb 2010 12:09:28 +0000

Hi Dr. Grant,

Please can you send me other link to access the link of calibration techniques for current sensor, because I can’t open the link of UIUC Wiki.

Best Regards

By: Grant Pitel

Grant Pitel — Tue, 08 Dec 2009 18:10:09 +0000

Shunt resistors do not have bandwidth limitations like hall-effect sensors. Just make sure you don't use wire-wound resistors (becomes an inductor). You may also be interested DCR current sensing, which works well at the frequencies you described.

By: Maher

Maher — Sat, 05 Dec 2009 16:42:04 +0000

Dear Dr. Grant,
I would like to ask you again about the current sensor. I need one work with high frequency (500 khz). so if you can recommended any one for me please
Regards

By: Maher

Maher — Thu, 19 Nov 2009 17:24:07 +0000

Actually, I went to IECON09 in Portugal and I published a paper related to your work and I wrote your name in aknlowdgment that’s the less thing I can do for you indeed. But my proposed solution to track the abrupt load change is complex so I found other solution but in this solution I should use the current model in identification not voltage model. However in the paper I preferred to use voltage model in identification rather than current.
Thank you very much for your help, you are very kind indeed.

Regards

By: Grant Pitel

Grant Pitel — Thu, 19 Nov 2009 03:09:42 +0000

In my experimental setup, I used at 50mOhm shunt resistor and amplified it with an instrumentation amplifier. I dug through my bill of material to find

91F4974 R OHMITE Newark $1.54 1 Current Sense Resistor 0.05 Ohms Passives\10_series.pdf $1.54

I used the DSP to calibrate the sensor in software so that it was accurate. Calibration technique is illustrated in video located at on the UIUC Wiki.
Good luck. Graduating anytime soon? Going to any upcoming conferences?