Download How Servo control combines power and precision

SERvO DRIvES
SERvO DRIvES
How Servo control combines
power and precision
A fluid solution for your machines
Servo drive systems are increasingly being used in place of a standard AC
motor as they offer superior control. Characteristics such as a high power
output to physical size ratio and fast acceleration, making them ideal for many
applications. These include packaging, product handling, printing and other
industrial machinery where precision is critical.
In general, the application of a servo motor is characterised by the
requirement for frequent changes in speed and torque, operation
from standstill to hold positions and short-term operation with high
peak loads. The common form of industrial servo system uses
an AC brushless synchronous motor with an integral absolute
encoder to provide feedback. In comparison to standard threephase AC motors, servo motors are considerably more compact
with a higher power density, higher efficiency and significantly
lower inertia. Hence they accelerate much faster, run cooler, and
provide instant power for automation tasks.
Compact Servo Motors
and Drives, Lexium 05
Top Grade Performance
• Highly compact servo drive with
exceptional performance, yet simple
to install
• High speed control loop of 65 micro
seconds and one millisecond new
reference response time
• Four modes of control including point-topoint in relative or absolute moves,
torque or speed regulation, electronic
shaft and manual mode
• Side-by-side mounting capability up to
50°C ambient
• In-built class A EMC filter
• Open connectivity with in-built CANopen
and Modbus as standard and
optional Profibus
• Compact IP20
The Lexium 05 is a powerful solution in
designing and optimising your machines
and is the perfect answer to your technical
and economical challenges. By combining
the essential motion control functions with
control and command
interfaces, it makes
your machines
simple, reliable
and costeffective.
Servo control system
The controller provides
overall control of the motion
system and can interface with
other equipment
A drive unit sometimes
referred to as an amplifier
controls the motor power
and speed
All making the Lexium 05 ideally suited to
a wide range of servo applications.
The servo motor provides
drive and contains an encoder
to provide feedback
LIMIT OR SENSOR
FEEDBACK
ENCODER FEEDBACK LOOP
The drive unit handles power and speed
control of the servo motor. In contrast to
three-phase AC motors without speed
feedback, the servo motor not only has
power terminals and an earth connection,
but also connections for the integral shaft
encoder. In some cases it will also have
brake control and temperature monitoring
connections. The encoder feedback loop
is key to the entire system and continually
provides motor output shaft speed and
position data. This allows the drive unit
to compensate for changes in load
conditions, which will affect the shaft
The process requiring
precision control
speed and monitor the exact position of
the shaft. This enables the system to drive
the motor to a precise position. The
controller, which could be a PLC or
dedicated motion controller, provides overall
control of the system. This controller
provides commands to the drive unit as
either simple ‘move’ parameters via a
fieldbus interface (for example Modbus,
or CANopen) or using pulse and direction
signals. The controller also monitors sensors
and limit inputs to ensure the process is
completed correctly and doesn’t exceed
predefined limits. n
JUNMA SERvO SERIES
The Junma range offer the user a compact servo drive and motor combination which is simple
to use, as the product has no parameters to set and features an automatic
tuning system. Pulses from a suitable controller are sent to the drive,
along with direction control. The servo drives are available in 100, 200,
400 and 750W models, with matching motors.
For the full range of drive units, servo motors and accessories
in the Junma series see BOOK 1 page 1-957
12 AUTOMATION APRIL 2008
146-305
Pulse servo drive 100W
£382.00
146-327
Pulse servo drive 400W
£431.00
146-197
Servo motor 100W
£223.00
146-210
Servo motor 400W
£311.00
Latest technologies from the leading automation brands
Lexium 05 servo drives
Power Rating
Supply Voltage
624-9043
0.75kW
200->240v
Max. Peak Current
10A
£498.00
624-9037
1.2kW
200->240v
17A
£568.00
624-9059
2.5kW
200->240v
28A
£768.00
624-9065
2.0kW
380->480v
22A
£710.00
624-9087
3.0kW
380->480v
34A
£798.00
A Dynamic Combination
The BSH servo motor with its new winding
technology based on salient poles is
compact and has an extremely low inertia,
making them ideally suited to reduce
machine footprints whilst maintaining
system performance.
Selection Guide
0.75kW 240v
1.2kW 240v
2.5kW 240v
2.0kW 400v
3.0kW 400v
Stall Torque
(Nm)
Nominal Speed
(rpm)
Peak Torque
(Nm)
Peak Torque
(Nm)
Peak Torque
(Nm)
Peak Torque
(Nm)
Peak Torque
(Nm)
BSH0551T31A2A
0.5
6000
1.4
-
-
BSH0553P31A2A
1.3
4000
3.2
-
-
-
-
BSH0702T31A2A
2.1
6000
-
4.1
6.7
-
-
BSH0703P31A2A
2.8
3000
-
7.2
10.3
8.7
-
BSH1001P31A2A
3.4
2500
-
-
8.5
8.5
-
BSH1002P31A2A
5.5
2000
-
-
16
13.9
-
BSH1003P31A2A
7.8
2000
-
-
19.7
-
23
Servo Motor Part No.
624-9071
BSH0551T31A2A
BSH servo motor 0.5Nm stall torque
£340.00
624-9093
BSH0553P31A2A
BSH servo motor 1.3Nm stall torque
£325.00
624-9100
BSH0702T31A2A
BSH servo motor 2.1Nm stall torque
£375.00
624-9116
BSH0703P31A2A
BSH servo motor 2.8Nm stall torque
£375.00
624-9015
BSH1001P31A2A
BSH servo motor 3.4Nm stall torque
£405.00
624-9021
BSH1002P31A2A
BSH servo motor 5.5Nm stall torque
£430.00
624-8769
BSH1003P31A2A
BSH servo motor 7.8Nm stall torque
£444.00
For the full range and further information please visit rswww.com/schneider
rswww.com/automation 0857 201201
AUTOMATION APRIL 2008 13