BTM-055-20 Finisar Corporation., BTM-055-20 Datasheet - Page 5

• Manufacturer Part Number: BTM-055-20
• Description: Rohs Bantam Trapezoidal Torque Amplifer Module
• Manufacturer: Finisar Corporation.

MoToR ConneCTionS
Motor connections are of two types for brushless motors: phases and Halls. For brush motors, only the armature connections are needed.
The phase or armature connections carry the amplifier output currents that drive the motor to produce motion. The Hall signals are
three digital signals used for commutating a brushless motor. When using a brush motor the Hall inputs should be unconnected and the
motor armature connections made between the U & V phase outputs.
MOTOR PHASE CONNECTIONS: BRUSHLESS
The amplifier output is a three-phase PWM inverter that converts the DC buss
voltage (+HV) into DC voltage waveforms that drive two motor phase-coils at a
time (trapezoidal commutation). Cable should be sized for the continuous current
rating of the amplifier. Motor cabling should use twisted, shielded conductors for
Ce compliance, and to minimize PWM noise coupling into other circuits. The motor
cable shield should connect to motor frame and the equipment frame ground for
best results.
MOTOR PHASE CONNECTIONS: BRUSH
The amplifier output is an H-bridge PWM inverter that converts the DC bus voltage
(+HV) into a DC voltage waveform that drives the motor armature. Cable should
be sized for the continuous current rating of the amplifier. Motor cabling should
use twisted, shielded conductors for Ce compliance, and to minimize PWM noise
coupling into other circuits. The motor cable shield should connect to motor frame
and the equipment frame ground for best results.
MOTOR HALL SIGNALS
Hall signals are single-ended signals that provide absolute feedback within one
electrical cycle of the motor. There are three of them (U, V, & W) and they
may be sourced by magnetic sensors in the motor, or by encoders that have
Hall tracks as part of the encoder disc. They typically operate at much lower
frequencies than the motor encoder signals, and are used for commutation.
When driving DC brush motors, the Hall inputs should be left unconnected.
Copley Controls, 20 Dan Road, Canton, MA 02021, USA
Web: www.copleycontrols.com
Bantam
Trapezoidal Torque
Amplifier Module
Tel: [phone]
Hall W
Hall U
Hall V
P1-11
P1-12
P1-13
P1-14
P1-19
P1-20
P1-21
P1-22
P1-11
P1-12
P1-13
P1-14
P1-19
P1-20
P1-21
P1-22
P1-1
P1-2
P1-3
P1-4
P1-1
P1-2
P1-3
P1-4
J1-16
J1-14
J1-12
No
connections
+5V
3.3nF
10k
10k
(+)
(-)
Fax: [phone]
W
U
V
RoHS
74HC14
Brushless
Page 5 of 18
Motor
Brush
Motor