Power amplifier for B&K Mini-Shaker 4810 that can handle DC-offset
Power amplifier for B&K Mini-Shaker 4810 that can handle DC-offset
(OP)
I would to perform some vibration tests using the Brüel & Kjær Mini-Shaker Type 4810. My test setup is a little odd because I want the shaker to be slightly displaced from its default position when performing the tests. This means the signal I send to the shaker must have a DC-bias. I have an Arbitrary Waveform Generator so generating a signal with a DC-bias is no problem. However, the Arbitrary Waveform Generator can't deliver as much power as the shaker needs. So, I need a power amplifier that can deliver about 1 Watt and that can amplify a the DC-component as well. Does anybody know where I can find such an amplifier or which companies might make these? If not, does anybody know of an alternate solution which doesn't require too much electronics design skills (I'm a software engineer)? Thanks in advance!





RE: Power amplifier for B&K Mini-Shaker 4810 that can handle DC-offset
BUT
The problem is more likely to be that the constant DC will fry the voice coils in the shaker. Can you not use an independently sprung suspension to provide the necessary displacement?
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Power amplifier for B&K Mini-Shaker 4810 that can handle DC-offset
RE: Power amplifier for B&K Mini-Shaker 4810 that can handle DC-offset
You'd be way better off shimming to get the offset
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Power amplifier for B&K Mini-Shaker 4810 that can handle DC-offset
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Power amplifier for B&K Mini-Shaker 4810 that can handle DC-offset
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Power amplifier for B&K Mini-Shaker 4810 that can handle DC-offset
Greg Locock: You mentioned a manufacturer called "Environmental Engineering", would you happen to know their web site address?
RE: Power amplifier for B&K Mini-Shaker 4810 that can handle DC-offset
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Power amplifier for B&K Mini-Shaker 4810 that can handle DC-offset