The MSA-12-80 miniature servo
amplifier is a low-cost, easy-to-use
amplifier for driving brush-type servo
motors at high switching frequencies.
The amplifier utilizes power
MOSFETs and surface mount tech-
nology to produce high power in a
small package. The MSA-12-80
accepts a ±10 V range input signal
directly from Galil programmable
motion controllers, or it can be con-
figured as a stand-alone drive. An
unregulated DC power supply is
required to drive the
MSA-12-80, which is
available from Galil as the
CPS Series (see page 88).
PHYSICAL
Dimensions: 5.09"
×
2.98"
×
.94"
Weight: 10 ounces
MODES OF OPERATION
The MSA-12-80 can operate in three
modes: current, voltage, or velocity.
These modes are set by two switches,
SW1 and SW3. SW2 is always off.
SW1 SW2 SW3
Current mode OFF OFF ON
Voltage mode ON OFF OFF
Velocity mode OFF OFF OFF
The current mode of operation is the
most common setting for use with
Galil motion controllers.
86
Power Amplifiers
·
Galil Motion Control, Inc.
·
800-377-6329
Description
F E A T U R E S
s
For brush servo motors
s
Miniature size; only 5"
×
3"
×
1"
s
2000 watts peak; 20 to 80 VDC, 12
amps continuous, 25 amps peak
s
Pulse-width-modulated at 22 KHz,
97% efficiency
s
Protection against over-voltage,
over-current, over-heating, and short
circuits across motor, ground, and
power leads
s
Adjustable loop gain, current limit,
and offset
s
Four-quadrant regenerative opera-
tion
s
Operates off single, unregulated DC
supply, also available from Galil
s
Surface mount technology for high
reliability
s
No external heatsink required
POWER RATING
DC supply voltage: 20 V minimum
80 V maximum
Peak current: 25 amps, 2 sec. maximum
Continuous current: 12 amps, internally
limited
ELECTRICAL SPECIFICATIONS
Minimum load inductance: 250 µH
Power dissipation at max. continuous
current: 15 W
Over-voltage shut-down: 90 V
Current loop bandwidth: 2.5 KHz typical
Heatsink temperature range: -25 to 65° C;
shuts off if above 65° C
Switching frequency: 22 KHz
MSA-12-80
Servo Amplifier
P O W E R A M P L I F E R S
MSA-12-80
BRUSH-TYPE
