I am undergraduate student and electrical engineer at a formula student team. I am doing a engine dyno using a DC motor in which I am getting the current output of around 400A which I am measuring through a shunt. But I want to get the output curve in terms of voltage, in which I am getting some difficulty as the current value is so high. So can you help me this |
by AMAN598
May 14, 2019 |
@AMAN598 can you provide a schematic? What is the load? Can you measure the voltage across the shunt? Why are you saying there is difficulty because the current is high? |
by mrobbins
May 23, 2019 |
can you be a bit more specific re what you wish to do?-- "output curve" Are you looking for a speed torque curve for the engine? In that case it's handy to know that for a dc motor with fixed field speed is proportional to generated voltage and torque is proportional to motor current. To get generated voltage you can measure terminal voltage with a voltmeter and you already have the current so you can calculate the generated voltage (terminal voltage - ir drop) . Let me know if this makes sense to you and I can go into more detail if necessary. |
by Foxx
May 25, 2019 |
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