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Power Brick Controller User Manual
Connections and Software Setup 45
Utilizing the following expression, for channels 1 – 4 as an example:
And monitoring the magnitude of the signals in the lower 16 bits of
PowerBrick[].Chan[].AtanSumOfSqr (e.g. in the watch window):

First, set up the excitation output magnitude, ResExcitMag . Start with highest (value of 3). We
want the value of AtanSumOfSqr (lower 16 bits) to be the greatest possible.

Set up the excitation frequency divider, ResExcitFreqDiv . Resolver manufacturers generally
specify a minimum operating frequency. Set this typically to a value of 0, same as the phase
clock.

Set up the excitation delay (from the phase clock), ResExcitDelay . This value is also configured
experimentally to produce the greatest possible value of the signal’s magnitude, which is in the
lower 16 bits of
AtanSumOfSqr .
Configuring Resolver ECT
Once, the resolver excitation signal is set up, the encoder conversion table can be configured as follows
(e.g. channel 1, motor #1):
Resolver Counts per User Units
With resolvers, the feedback resolution is set by the ASIC interface hardware, and produces 65,536
counts per revolution.
GLOBAL ResExcitDelay;
GLOBAL ResExcitMag;
GLOBAL ResExcitFreqDiv;
ResExcitMag = 3 // [0 - 3]
ResExcitFreqDiv = 0 // [0 - 3]
ResExcitDelay = 65 // [0 - 255]
PowerBrick[0].ResolverCtrl = ResExcitDelay* EXP2 (24) + ResExcitMag* EXP2 (22) + ResExcitFreqDiv* EXP2 (20)
Motor[ 1 ].ServoCtrl = 1
EncTable[ 1 ].Type = 1
EncTable[ 1 ].pEnc = PowerBrick[ 0 ].Chan[ 0 ].AtanSumofSqr.a
EncTable[ 1 ].pEnc1 = Sys.pushm
EncTable[ 1 ].index1 = 0
EncTable[ 1 ].index2 = 0
EncTable[ 1 ].index3 = 0
EncTable[ 1 ].index4 = 0
EncTable[ 1 ].index5 = 0
EncTable[ 1 ].index6 = 0
EncTable[ 1 ].ScaleFactor = 1 / 65536