Aerotech BAL LINEAR AMPLIFIER SERIES, User Manual

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Installation and Operation BA Linear Series User’s Manual
2-12
Aerotech, Inc.
Version 1.5
2.6. DC Brush Motor Operation
The BAL can control up to three brush motors. There are two different configurations for
brush mode operation.
2.6.1. Single Brush Motor
In this mode, a brush motor can be controlled in either velocity mode or current mode,
refer to Figure 2-7. The connection of the motor phase to the amplifier is done through
phase A and phase C. This configuration allows the motor to see the entire bus. Meaning,
if a BAL10-40 is the amplifier, then the brush motor will have 80 volts across its
terminals and a BAL10-80 will put 160 volts across the motor terminals (Differential at
full speed). Connecting the "+" side of the motor to A and "-" to the RT (Return) allows
the motor to operate in a single-ended mode. This means that the A terminal will swing
plus and minus with respect to RT. For a BA10-40, the motor will only see +40V or -40V
maximum; not 80V. This permits lower voltage DC motors to be used safely with BAL.
The jumper settings for velocity or torque mode can be found in Section 2.5.1. and
Section 2.5.2.
Figure 2-7. Single Brush Motor Configuration with Tach
Differential
Velocity Or
Torque CMD
SIG COM
5V
Shutdown
Fault
SIG COM
Shielded Cabling
Motor Phase A
Motor Phase C
A
B
C
RT
LO
HI
2, 20
3
7
8
21
14
10
23
1
J6
+ INPUT
- INPUT
SIG COM
SHUTDOWN
FAULT
SHIELD
BAL AMPLIFIER
AC LO 115/230 VAC 50/60 HZ
AC HI (Depending on Mode)
Earth Ground
-
-
+
+
DC Motor
T
MA
OR
For Single Power Supply
Operation