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Author Topic: How to change the direction of the current in a control system?  (Read 1055 times)

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Offline SatoruSatakeTopic starter

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How to change the direction of the current in a control system?
« on: November 11, 2014, 12:03:34 pm »
Hello everyone,!
I was given a hard question from my "control system" professor ,the question is: there are two input through a op-amp(+12Volt and -12Volt),so, how to achieve that "when the +12V through the circuit, the current has a deriction, and when the -12V is applied, the current has another direction?" Can I use the "Howland Current Pump"? If not, what can I choose?
Thank you!
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Offline Andy Watson

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Re: How to change the direction of the current in a control system?
« Reply #1 on: November 11, 2014, 12:34:34 pm »
Yes, the Howland configuration would be good.
It does depend on the magnitude of the current you are controlling. At low levels of current you could also look at transconductance amplifiers - like LM13700, or CA3080.
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Offline SatoruSatakeTopic starter

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Re: How to change the direction of the current in a control system?
« Reply #2 on: November 11, 2014, 01:06:24 pm »
Thank you Andy! I got it! ;)
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