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Feedback Devices
Resolver
Common feedback devices for ABB BSM servo motors include Resolver, Incremental
Encoder, and Absolute Encoders. Custom feedback devices are also available.
Contact ABB for more information.
Resolver Schematic Diagram
R1
Red/
White
R2
Yel/
White
(Primary)
L2=Motor lead L2 (V)
L3=Motor lead L3 (W)
Waveform 1
8 Pole Motor and
2 Pole Resolver
Waveform 2
4 Pole Motor and
2 Pole Resolver
MN1240
Figure 2-10 Typical Resolver Feedback Device
S1
Red
S3
Blk
S2
S4
Yel
Blu
(Secondary)
Resolver Speci cation
Power Source
Primary Element
Electrical Error
Transformation Ratio
Phase Shift
Accuracy Spread
Input Impedance ZRO
Output Impedance ZSO
ZSS
DC Resistance
Rotor
Stator
Dielectric Strength
Insulation Resistance
Weight
Maximum Operating Speed
Operating Temperature Range
L2−L3 Generated Voltage
L2−L3 Generated Voltage
AC 10Vrms 4.5kHz
Rotor
±7%
0.5 ±10%
±8° nominal
12 ARC minutes
90 + j180
nominal
220 + j350
@ 0° (S1−S3)
210 + j300
@ 0° (S1−S3)
46
REF
120
REF
AC 500 volts, 1 minute 60/50 Hz
100M
Minimum DC 500Volts
0.18kg Maximum
10,000 RPM
−55 ° C to +150 ° C
Cosine Signal
Cosine Signal
2-13
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