I want to regulate the input current into an ultrasound transducer (40 kHz, 50W). The signal is being generated by PCB. I read that regular potentiometers are usually employed up to a power of 1 Watt. I have found potentiometers that could be used, but they seem a bit bulky and expensive (ca. 80 EUR). Is there an alternative to a standard potentiometer to regulate the current up to 50W?
Electrical – Alternative to a potentiometer to regulate 50 W
potentiometerpowerultrasound
Related Solutions
Incremental encoders often have a haptic detent, and most have a push-button built-in. The detent momentum to overcome the detents may vary from hardly feelable to a clear click. There are also encoders which run smoothly, without detents. Most encoders have between 12 and 30 detents (and also pulses) per revolution.
Try these linear amplifiers made by Apex. They are designed specifically for ultrasound aplications.
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Best Answer
Don't try to scale down the 50 W signal coming out of the driver. Instead, control the driver circuit to produce a lower amplitude signal.
This is the same concept as a volume control for audio. There isn't some big fat pot between the power amp output and each speaker. Instead, the volume control adjusts the amplitude of the low power signal going into the amplifier.
Show the power driver, and how it is controlled. From that we can probably recommend ways to cause it to make less power. Without those details, there is little to say.