Hi I'm working on a brushed DC motor with permanent magnets. I'm giving it 12V as input voltage (with a bench power supply) and it produces a back EMF that has a range of about (-90,90)V that I've seen in my oscilloscope, since here nothing is strange.
The power supply and the oscilloscope are conncted to the same 230 AC (Europe AC voltage) through the same power strip...
I tried to completely disconnect my scope from the motor and the channel of my scope is detecting the back EMF anyway(same frequency of the DC motor), but in this case the range goes from (-5,5)V.
Since I will have to test the same kind of motor but also more poweful than the one I'm testing right now, I'm concerned about a way to completely isolate the bench power supply from the power strip so that the oscilloscope won't detect any back EMF as it should be and also to protect my other instruments/electric device.
How can I do that? Can an isolated transformer do this?
Thanks in advance
The power supply and the oscilloscope are conncted to the same 230 AC (Europe AC voltage) through the same power strip...
I tried to completely disconnect my scope from the motor and the channel of my scope is detecting the back EMF anyway(same frequency of the DC motor), but in this case the range goes from (-5,5)V.
Since I will have to test the same kind of motor but also more poweful than the one I'm testing right now, I'm concerned about a way to completely isolate the bench power supply from the power strip so that the oscilloscope won't detect any back EMF as it should be and also to protect my other instruments/electric device.
How can I do that? Can an isolated transformer do this?
Thanks in advance