P O W E R A M P L I F I E R S
Power Amplifiers
89
BRUSHLESS
MBA-6-60
The MBA-6-60 miniature servo ampli-
fier is a low-cost, easy-to-use amplifier
for driving brushless servo motors at
high switching frequencies. The ampli-
fier utilizes power MOSFETs and sur-
face mount technology to produce
high power in a small package. The
MBA-6-60 accepts a ±10 V range input
signal directly from Galil programma-
ble motion controllers, or it can be
configured as a stand-alone drive. An
unregulated DC power supply is
required to drive the MBA-
6-60, which is available
from Galil as the CPS Series
(see page 88).
Description
F E A T U R E S
s
For brushless servo motors
s
Miniature size; only 5"
×
3"
×
1"
s
720 watts peak; 20 to 60 V DC,
6 amps continuous, 12 amps
peak
s
Pulse-width-modulated at 33
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
operation
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
60 V maximum
Peak current: 12 amps, 2 sec. maximum
Continuous current: 6 amps, internally
limited
ELECTRICAL SPECIFICATIONS
Minimum load inductance: STD
Power dissipation at max. continuous
current: 18 W
Current loop bandwidth: 2.5 KHz typical
Heatsink temperature range: -25° to 65° C,
shuts off if above +65° C
Switching frequency: 33 KHz
MBA-6-60
Servo Amplifier
PHYSICAL
Dimensions: 5.09"
×
2.98"
×
.94"
Weight: 10 ounces
MODES OF OPERATION
The MBA-6-60 can operate in three
modes: current, open loop (voltage), or
velocity. These modes are set by two
switches: SW1 and SW3.
SW1 SW3
Current Mode
OFF ON
Velocity Mode
OFF OFF
Voltage Mode ON OFF
The current mode of operation is the
most common setting for use with
Galil motion controllers.
