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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