Power supplies, inject current to its output

[vortex3]

Hello everyone,

I have a general question about a power supplies:

I gonna buy a commercial bipolar power supply to which it is possible to control the voltage/current output and also have monitoring circuits that feedback to you the real voltage/current on its output. In normal operation, when the output voltage is positive, also the output current is positive; and when the output voltage is negative, also the output current is negative. However, in my application I need to be able to read negative current when the output voltage is positive and positive currents when the output voltage is negative (in other words, the circuit will inject current on the power supply instead of the power supply inject current to the circuit).

Does anybody knows is a power supply is capable of this behavior?

Thank you very much for your help.

 

[mtwieg]

Most power DC-DC converter topologies can be modified to pass power and current in both directions, and there are some controllers designed for that purpose. However converters that with an output that can become positive or negative is not easy to do, and I don't know of any controllers which are specialized for that.

 

[vortex3]

I need +/- 200V and less than +/-1A