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If you post your circuit, it would certainly help.
Can you use a sense resistor, a fast op-amp configured as differential and a comparator to detect fault?
I should have said, is there a mathematical way or a study paper that discusses the effect of EMI filter when it is placed after the bridge rectifier (on the DC bus side)?
This isn't for a new design. In the past designs that I have done, I have used a full blown (one or two stage) filter with...
Yes, the motor drive is the main source of EMI here. Placing the filter after rectifier makes it a simpler filter (across 2 lines rather than 3).
Is there some simple math to understand how the filter effectiveness is reduced? Or running a test with LISN the only way?
I am trying to use TL431 as a comparator (kind of like this article):
**broken link removed**
The article says - "When the battery voltage is higher than the threshold voltage, the cathode voltage of the TL431 is at its low level of approximately 2V".
My question is = Why does the cathode...
I didn't read any of the posts above.
To answer your question, SMPS control is not a secret. The best way to go about it is pick a controller (other than Power Integrations junk) and design a type 2 feedback circuit. There are a lot of resources for it. But the easiest way to go about it is use...
https://i53.tinypic.com/300qt8l.jpg
I have searched for this a lot (on this forum and google). Can someone verify/explain how this circuit works?
Here is my understanding: TL431 has a ~2.5V reference. The resistor divider of R1/Rlower creates a divided down output voltage. The difference...
Because I know where my sensor reading will be for the most part, so I don't want the whole range... I want to extract just the data I need, maybe put some gain on it, and send it to A/D to look for small changes.
I am using a single supply op-amp, so summing can work. Though I want it such...
enjunear, the sensor output gets buffered and goes into a 0-3.3v a/d.
E-goe, I was thinking about that (offset and clip the upper part). So, if I do 1V offset (to remove the lower range), then the output of the opamp will be 1V when no input is applied? Because of the dc bias. What I want is...
I have a 0-5V sensor output that goes to an op amp buffer and then to an A/D. I only need data from 1-3.3V from the sensor output. Chopping the top end is easy by using a zener clamp or something similar. How do I remove the bottom end, so I don't see 0-1V data. I figure use an op amp, but what...
Thanks! I already did that. Product Index, PMIC - Motor Drivers, and chose application as three phase bldc motor drive or 3p motor drive, with throughole package. I may have to go with an h-bridge pack and separate gate driver IC. It would have been nice if it was in one package, it makes less...
I am using Actel Fusion FPGA, and the Fusion embedded kit: Fusion Embedded Development Kit
The Ishnatek guys do this in verilog, which I don't know. I am doing it in VHDL.
It's so hard to find motor drivers in DIP packs.
The components you suggested make up the entire motor controller. I need just the middle portion from the block diagram (H-bridge + Gate driver). Something like this:
**broken link removed**
Except, it does not come in TH/PDIP style package.
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