Information subject to change
96-8005549_3-18-21
8508 OPERATOR’S MANUAL – SECTION 6
22
If the output current waveform is neither under
damped or over damped, but the top of the square
wave is not level, then you should instead de
-
crease the capacitor value (see
Figure 6.8
).
ters in the resistor location of the compensation
circuit because this can decrease stability and
may increase inductance.
•
The parallel capacitor in the RC network serves
to increase stability but can be removed, if it is
not required for system stability. If the parallel
capacitor is used, it will usually decrease the
value of resistance needed.
•
In multiple amplifier systems, expect to decrease
the value of R5 in series systems by 1/2.
6.2 Driving Reactive Loads
Like all switching amplifiers, 8500 series ampli-
fiers are able to reuse the energy returned from
reactive loads. Unlike purely resistive loads, loads
with some reactance (either capacitive or induc-
tive) will store energy during part of a cycle, and
then release some of this energy back later. This
energy is transferred back to the load through the
amplifier’s power supply. This allow the amplifier
to deliver continuous apparent power that is up to
five times the rated power of the amplifier when
driving reactive loads.
Figure 6.8 – Square Wave Showing a
Decrease in C is Required
When making adjustments:
Resistor:
Increase or decrease resistance values
in increments of +/- 10%.
Capacitor:
Incrementally decrease capacitor val-
ues by a factor of 2 or 3.
After final adjustments have been made to the
circuit, the final waveform for your planned appli-
cation should be tested to confirm the amplifier’s
compensation setting.
NOTE:
•
If possible, use 1% metal film resistors. AE
Techron discourages installation of potentiome-
Summary of Contents for 8500 Series
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