welcome to another labold tutorial this
video will introduce you to the thyris
3-phase Bridge with feedback please note
that this function is the most complex
function of the thyer control
application I suggest you try the thyer
three-phase bridge function first before
working with this function in order to
understand the basic features and
functionality when lvd is open left
click on this button to open the thyris
control application
[Music]
then under function selection click on
the function you want to use here the
thyer 3phase bridge with feedback just
under in function settings you get
access to all the customizable features
of this function command input you can
choose knob analog input one or its
complement command I'll talk about this
later Arc cosine linearization of the
output voltage
variation this setting maintains a
constant variation of the output voltage
by acting on the firing
angle note that it also reverses the
command controller proportional gain
KP controller integral gain
Ki feedback input you can choose E3 I4
speed analog input 2 and E3
I4 this input decides what you want to
regulate in other terms this function
can regulate voltage by E3 current by I4
speed through digital input A and
B whatever comes in by analog input 2
and finally power in Watts the product
of e3 by
I4 feedback range sets the maximum value
you can get for the specific feedback
input you have chosen feedback filter
cut off frequency a low pass filter
acting on the feedback input
acceleration and deceleration time for
smoother command
variation q1 to q6 as you see in this
function every thyristor is used you can
choose for each one active for Direct
Control of the thyer by the application
or always on or off for
troubleshooting status indicates if the
function is started or
not here is the knob that controls the
command value the start stop button and
finally the meter here that gives you
the value of the firing angle sent to
those
thyr let's get back to the command
percentage line here this line sets the
output value of the bridge in percentage
of the feedback
range for example if the feedback input
is E3 and the feedback range is 70 then
the output range of the three-phase
bridge will be from 0 to 70 volts and a
command percentage of 50% will ask the
bridge with feedback to maintain 35
volts on the output regardless of the
load if the feedback input is speed and
the feedback range is 2,000
RPM then 50% here will ask the
three-phase bridge to maintain a speed
of 1,000
RPM as always here's the electrical
diagram of the function and the show
connection button to help you connect
your Hardware equipment
for this demonstration I will use E3 as
the feedback input on a variable
resistive
load this means that the three-phase
bridge will regulate the voltage red
through
E3 it implies that you need to connect
the meter E3 of the 9063 at the load if
you want the regulation process to work
it is exactly the same principle for the
other feedback inputs like speed or I4
when all your equipment is correctly
connected start the application
the yellow curve here is the input
voltage the blue curve is the output
voltage or load voltage and the purple
curve is the signal sent to q1 finally
the red curve is the current through the
load as you can see the command asked of
the three-phase bridge is 50% of 70
volts this means I want around 35 volts
at the load which is exactly what I get
now to observe the regulation process I
decrease the input
voltage as you can see the firing angle
automatically decreases to maintain 35
volts if I increase the input voltage
the controller automatically increases
the firing angle to percent having high
voltage at the output and maintains 35
volts this regulation process works
great I can vary the load increasing the
current in it and still the load voltage
is maintained at 35 volt you can try
various proportional and integral gain
configurations to see what happens to
the output voltage and regulation
efficiency depending on the application
some settings might be better in one
case but bad in
another try finding the best setting
possible here I changed the command to
80% which equals 56 volts at the
output again the thyris 3-phase Bridge
varies the firing angle to reach the
command asked I suggest that you try
other command percentages or another
feedback input like I4 or speed and see
the results that's how the thyer 3-phase
Bridge with feedback works