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We
combined the latest digital and analog technology
to design some of the best performing linear servo amplifier products on the market today.
These transconductance (current mode) linear servo
amplifiers are ideal for low friction applications
requiring high bandwidth, low noise and minimal
distortion from the power electronics.
Our design features a high speed DSP that provides
monitoring and user interface functions while the
analog control and linear power stages provide
extremely quiet control of the outputs. True
linear output control is obtained with out
any
zero
crossover distortion. Our sophisticated
real-time fault detection algorithms continually
protect the amplifier from potentially damaging
conditions. One of the main parameters to
consider when specifying and using linear servo amplifiers is the power
rating of the amplifier. If the power in the application exceeds the
capability of the amplifier, most other amplifiers will be destroyed by
this condition. Our LA series amplifiers all feature our exclusive Safe
Operating Area (SOA) protection. This feature monitors the power in each
output device in real-time and protects the amplifier from damage in the
event of an over-power condition.
Our linear
servo amplifiers can drive brushless motors in
either sine mode (2 phase input) or Trapezoidal
mode (6 step) using motor mounted hall
sensors.
Adding
our new VMC-3000 plug-in module allows torque mode
or velocity mode sinusoidal commutation from an incremental encoder
and a +/-10vdc command input. Full positioning
mode is also available with this controller as an
option, allowing the LA series to become a
complete single-axis motion system.
A simple jumper setting selects
between the modes of operation. In
sine mode, the amplifier requires two +/-10vdc
current command signal inputs 120 degrees
out of phase. No feedback is required back to the
amplifier. The servo amplifier generates the third
phase internally. In Trapezoidal mode,
the amplifier requires a single +/-10vdc current
command input signal. The motor's hall sensors (or
encoder commutation tracks) are connected to the
amplifier for commutation. The servo amplifier
provides the 3 phase currents based on the
position of the motor shaft. Brush mode (DC)
motors can also be driven in current mode using a
+/-10 vdc command signal input.
These linear
servo amplifiers are easily configured using
either the on-board jumpers or with the built-in
serial interface. The serial interface also allows
monitoring of the drive parameters and status in
real-time during operation. All settings are
stored in non-volatile memory during power-off
conditions. Our servo amplifiers can
easily be configured during production by
downloading the settings from a host computer.
Our exclusive
Autobalance feature allows fast and easy setup
with any motor or load. This feature tunes out the
inherent imbalances found in any analog servo
output stage, allowing full power to be delivered
to the windings of the motor. This feature alone
has saved our customers valuable time and money
during manufacturing, since anyone can now balance
the amplifier with the push of a button - no screwdrivers,
"pot tweakers" or meters are needed.
Each of
the power levels is available in either a
three-phase version for AC Brushless motors, or a
single-phase version for Voice Coil Motors and DC
Brush Motors.
Linear Servo
Amplifiers for high performance applications
Technical Specifications
|
LA200 |
LA407 |
LA508-25 |
| Cont.
Power,
Watts |
200* |
400* |
500* |
| Peak
Power,
Watts |
400* |
1200* |
1500* |
| Cont.
Current,
Amps |
2.5 |
5 |
10 |
| Peak
Current,
Amps |
10 |
15 |
25 |
| Bus
Voltage,
Vdc |
±12
to ±75 |
±12
to ±75 |
±12
to ±75 |
| Max.
Bandwidth |
10
kHz |
10
kHz |
10
kHz |
| Dimensions |
8.00"x
7.50"x 1.46" |
8.00"x
7.50"x 2.24" |
8.00"x
7.50"x 2.75" |
*Note: Customer must provide proper
cooling
Linear Servo
Amplifiers Technical Specifications
Applications
for our LA series Linear Servo Amplifiers
- Linear
Air bearing stages
- Rotary
Air bearing spindles
- Spindle
control
- Linear
Servo Stages
- Rotary
Servo Stages
- Diamond
turning lathes
- Lens
grinding equipment
- Laser
steering
- Ultrasonic
scanning
- Coordinate
Measuring Machines (CMM's)
- Disk
inspection spin stands
- Thermoelectric
cooling control (TEC's)
- Fiber
optic welding
- High
resolution positioning systems
- Semiconductor
processing equipment
LA407
Linear Servo
Amplifier
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