DC motor signal

[Albert.lu]

Hello all experts,

Now I have a project about automotive,I want to check DC motor signal :phase_U,phase_V,phase_W

as attached picture.

However,I don't know how many test items need to be performed.

Anyone can help me,thanks

Albert

[P@Anand]

What do you mean Test items? Do you want to measure the values at MOUTs? 

 Or do you have some sort for algorithm for performing some math operation. Please explain.

[mikeporter]

Boy that is one studly 8051 you are using there! In any case, to measure the three outputs you will be needing 3 analog inputs.

Mike...

[Albert.lu]

Hello,

I guess PC send commands to the controller by UART or other communication protocol  then MOUT0,1,2 will output signal.

So we will check this signal to make sure DC motor fuctionality good or not.

Test items means voltage ,frequency ,THD,and so on.

If DAQ card can check this fuction or need Oscilloscope?

Thanks a lot

[Albert.lu]

Hi, 

Yes,i want to check Mouts values,thanks

[Albert.lu]

Hi, 

Yes,i want to check Mouts values,thanks

[mikeporter]

Do you know what the large IC in your schematic is? It's a variant of an 8051 microprocessor. It does whatever its program tells it to. How is it programmed? From what is there, I can't tell if it even has a serial interface on it -- or how it might be used.

Mike...

[Albert.lu]

Thanks for your information.

Yes,I know larger IC is microcontroller,also know it would be programmed before used.

Now there is no any useful information about programmed code and its fuction.

But even if missing much information,I must make test plan to customer.

I just want to know how to test MOTOR signal in normal method.

Check freq,THD,voltage....etc?

If DAQ card can meet this test requirement?

Or need to use oscilloscope?

Thanks

[Dennis_Knutson]

Yes, you can use a daq card but you must know something about the signal in order to select the correct one. You just can't blindly assume anything. What sort of sample rate, simultaneous capture, maximum amplitude, etc.

[mikeporter]

well, assuming that whatever the uP is in is operating, It might be useful to look at the outputs with a o'scope to see what the data there actually looks like. This will tell you things like amplitude and give you some insight into the sort of sampling rates you will need.

Mike...