Power Brick Controller User Manual
Connections and Software Setup
44
Setting up Resolvers
Configuring a resolver requires setting up the excitation signal control. The excitation signal control
element,
PowerBrick[].ResolverCtrl
, is a 4-channel saved component:
Excitation Signal Control
Channels 1 – 4
PowerBrick[0].ResolverCtrl
Channels 5 – 8
PowerBrick[1].ResolverCtrl
The excitation signal control element is a 32-bit element wherein the upper 12 bits carry meaningful
information is broken down as follows:
Bit #:
Binary:
Hex ($):
Bits [31 – 24]
specify the phase shift or delay of the excitation sine wave with respect to the phase clock.
The unit of this field is 1 / 512 of an excitation cycle. This component is usually set experimentally to
maximize the magnitude of the feedback signal.
Bits [23 – 22]
specify the magnitude of the excitation output. The highest magnitude that does not cause
saturation of the feedback ADCs (which occurs when values in the lower 16 bits of
PowerBrick[].Chan[].AtanSumOfSqr
exceed 32767) should be used.
Peak-Peak [Volts] Value Binary
3.2
0
00
6.2
1
01
8.8
2
10
12.2 (Max.)
3
11
Bits [21 – 20]
specify the frequency of the excitation output. The frequency that comes closest, but slightly
higher, to that recommended by the resolver manufacturer should be used.
Excitation Frequency Value Binary
Phase Clock / 1
0
00
Phase Clock / 2
1
01
Phase Clock / 4
2
10
Phase Clock / 6
3
11
Phase Shift (Delay)
M
ag
.
Fr
eq
.
Reserved
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1 0 0 0
0 0 0 0
1 1 0 0
0 0 0 0 0 0 0 0
0 0 0 0
0 0 0 0 0 0 0 0
8
0
C
0
0
0
0
0
