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I have a function generator that has an output voltage of 10Vpp. I need to use it to drive a voice-coil-actuator (VCA) that operates on 35V and 11.7A.

I was searching for a solution to amplify the signal from the function generator to reach the required operating volt. Any ideas how to achieve this task? Can I use a transformer instead of an amplifier?

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    \$\begingroup\$ Buy a 400W Class D audio DC power Amp or motor controller \$\endgroup\$ Commented Jul 29, 2021 at 13:34
  • \$\begingroup\$ Does Audio amp support the frequency range of VCA that is somewhere between 0~120 Hz? \$\endgroup\$
    – Power
    Commented Jul 29, 2021 at 13:53
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    \$\begingroup\$ The VCA is a V/I= 3 ohm load similar to subwoofer amps, yet those typically do not go down to DC. Your need to say what is your input power source available and go shopping. There is no cheap solution. \$\endgroup\$ Commented Jul 29, 2021 at 14:29
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    \$\begingroup\$ We have a big vibration table that uses 4 VCAs and a pair of two-channel rackmount audio amplifiers. As far as I can tell, the amps are completely off the shelf and unmodified. The big caveat is that you are limited by the lowest reproducible frequency of your amplifier which is, as mentioned, typically not zero. \$\endgroup\$
    – vir
    Commented Jul 29, 2021 at 14:40
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    \$\begingroup\$ I wouldn't necessarily think any amp would work since they're not really designed for that application. You might have to do some experimentation to see what works, remembering that specifications for audio equipment (specifically power) should be taken with a grain of salt. The amps we have are Crown DSi 1000s. \$\endgroup\$
    – vir
    Commented Jul 29, 2021 at 15:10

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