Issue 1.5 Q-Drive Installation Manual
Copyright © 1996 Quin Systems Ltd. Page 57
10. Configurations
10.1 General
This section gives details of the configuration options on all the drive boards used in the
Q-Drive range of servo amplifiers, although the settings are not normally changed. The
amplifiers are set up as described below when shipped.
10.2 Resolver Ratio
The ratio and the amplitude to the primary of the resolver are determined by resistors
RSIN, RCOS and RREF.
Standard fitting:
RSIN = RCOS = 0 (bridge) for a resolver ratio of 2:1
RREF = 12 k ohm to obtain 4V
eff
to the resolver primary
Special cases:
Use the following formula:
Where: - RREF is expressed in k ohm
where: -Vref is rms voltage applied to the primary of the resolver.
Vref max. = 6 V
To calculate the values of Rsin and Rcos use the following formula, where Rcos and
Rsin are expressed in k ohm
Kr is the resolver ratio
(Resolver ratio 2 : 1 corresponds to Kr = 0,5)
Rref
88
Vref
-----------
=
10–
Rsin Rcos
r×
10 Vref–
------------------------
100–==
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