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Hi, Adam Ring here with Innovative IDM. I want to take a few minutes and explain a little
bit about how an AC drive works. Really basic. First, we start off with the sine wave an
AC sine wave typically three phase power or we can also use a single phase power as well.
So, we take that we send it through a bridge rectifier or series of diodes basically convert
that AC into DC. So, it starts off and its a sine wave. Once it goes through the rectifier
it basically flips all the bottom half's up and makes DC, direct current. We store that
in these large capacitors sometimes we call them water towers and that basically is our
source for what we are going to use to generate a synthetic AC sine wave out to a motor. Then,
we take that DC and we go through a series of transistors which are basically electronic
switches and we use that to create a synthetic sine wave, where we can vary the voltage and
the frequency in order to get a motor to spin at a given rate. If we keep the ratio of the
voltage to the frequency consistent, then we can produce constant torque throughout
slow speeds all the way up to the base speed of the motor. In some cases we can even go
up beyond the base speed of the motor. So, in a nutshell that's how an AC dive works.
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