Aerotech BAL LINEAR AMPLIFIER SERIES, User Manual, Page: 26 / 56

Installation and Operation BA Linear Series User’s Manual
2-6
Aerotech, Inc.
Version 1.5
2.3.3. Dual-Phase Command Configuration
This mode is used with a brushless motor only. In this configuration, the differential
input, pre-amplifier, and self-commutation circuits are bypassed. The dual-phase inputs
are sinusoidal and are 120
°
out of phase from each other. The third phase is generated by
the amplifier. The dual-phase command configuration is shown in Figure 2-4. The
advantage to this configuration is that it provides the smoothest possible motion.
Figure 2-4. Dual-Phase Command Configuration
SIG COM
5V
Signals to Optional
Position Velocity Loop
Controller
3 Hall A, B, C
2 MKR, MKR-N
2 COS, COS-N
2 SIN, SIN-N
2 5V, SIG COM
MKR, MKR-N
SIN, SIN-N
COS, COS-N
5
V, SI
G CO
M
HALL A, B, C
Square Wave Quadrature
Encoder with Commutation
Tracks or Hall Sensors
Brushless Motor
Shutdown
Fault
SIG COM
Dual Phase Current
Command Provided
By Commutating
Controller
Shielded Cabling
Motor Phase A
Motor Phase C
A
B
C
RT
LO
HI
2, 20
7
9
22
14
10
23
1
J6
ICMDA
ICMDB
SIG COM
SHUTDOWN
FAULT
SHIELD
Motor Phase B
BAL A
MPLIFIER
AC LO 115/230 VAC 50/60 HZ
AC HI (Depending on Mode)
Earth Ground
* The RT connection is used
with six wire, three phase
motors and with single-phase
brush AC motors.
*