current power amplifier - need help with the design

[vilakazyp]

current power amplifier

hi all

Please help me, im currently working on an active magnetic bearing (AMB) project on which im required to design a current power amplifier and its control circuit:

the specifications are: 40-60Vdc input
5A continuous & 10A peak
Red LED=2kHz & Green LED=1kHz

control circuit: 1volt to 1A output increase in amplifiers output


Best redards

 

[kwkam]

current power amplifier

LM12 or LM3886 may be help

 

[vilakazyp]

Re: current power amplifier

greetings

thank very much for replying to my email. could you please eleborate more, what is LM12 or LM3886?

Regards

 

[FvM]

Re: current power amplifier

what is LM12 or LM3886?

If you know google, you wouldn't have to ask...

They are Natioal Semiconductor power amplifiers. You have to add a current control loop however. And I wonder, how LED colours are related to a current amplifier?

 

[vilakazyp]

Re: current power amplifier

Is it possible to use a PID controller to control the Current power Amplifier via a PWM generator? for current control loop, i will use a currrent transducer which will feed the actual current to my PID controller for any necessary rectifications. is it wise to do so?

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