On Wed, May 20, 2009 at 10:43 AM, Levente Kovacs <[1][email protected]> wrote:
On Wed, 20 May 2009 10:33:30 -0500 Mark Rages <[2][email protected]> wrote: > 100 amps and 500 watts implies a load impedance of 0.05 ohms. Some > professional audio amplifiers may handle this, but I think most will > go into self-protect mode. > > Best bet might be a car amp: > [3]http://www.sonicelectronix.com/item_11796_Kenwood+KAC-8104D.html Looks nice. > If Levente is just looking for a sine wave, he should check out > variable frequency drive motor controllers. Search ebay for "VFD". No, we want to test a current sensor with mains' frequency. However there are transient once in a while on the line, so we must simulate them too. OK, so this amp: [4]http://www.sonicelectronix.com/item_11682_MA+Audio+HK10KA.html is rated to deliver 10kw into 1 ohm, if you feed it 17.5 V. That's 100A. The protection circuitry may still be a problem with your load, however. Also, I am not endorsing that vendor, it's just a random website I ran across. What kind of transient are you trying to simulate? Maybe it would be easier to make a circuit to add the transient to mains power, instead of recreating mains power with an amplifier. Regards, Mark markra...@gmail -- Mark Rages, Engineer Midwest Telecine LLC [5][email protected] References 1. mailto:[email protected] 2. mailto:[email protected] 3. http://www.sonicelectronix.com/item_11796_Kenwood+KAC-8104D.html 4. http://www.sonicelectronix.com/item_11682_MA+Audio+HK10KA.html 5. mailto:[email protected]
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