I would like to get a modest capability to do some of the ramped power quality tests defined in MIL-STD-704. Typically, I would want to be able to apply various DC voltage inputs to a test specimen, and then slew those voltages following the typical dV/dT requirements. Typical exposures might be 28 VDC for 30 seconds, then ramping to 50 VDC in 10 milliseconds, holding 50 VDC for 5 seconds, then ramping to 12 VDC in 40 milliseconds, etc. The problem I have is that all of my power supplies are too slow to track the ramps, and even when they get close, I am seeing capacitor charge/discharge curves rather than straight ramps. So I have been thinking that maybe what I want is a DC coupled amplifier. Perhaps one possibility is the automotive aftermarket, where those rude idiots buy those thousand watt boom boxes that they use to rattle my house when they drive past. I think they now use Class D switchers for those amplifiers. Does anyone have any suggestions about where I might look? Ed Price [email protected] <blocked::mailto:[email protected]> WB6WSN NARTE Certified EMC Engineer & Technician Electromagnetic Compatibility Lab Cubic Defense Applications San Diego, CA USA 858-505-2780 (Voice) 858-505-1583 (FAX) Military & Avionics EMC Is Our Specialty -
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