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Automation Technologies 3/2016

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Automation Technologies 3/2016

Servo drive series with

Servo drive series with intelligent function CONTROL AND DRIVE TECHNOLOGY Manfred Niedoba The new Sigma-7 motor from Yaskawa was developed with three main goals in mind: maximum operational reliability, high production output and consistently fast commissioning. Considering the requirements of machine constructors and end-users, the new Sigma series is well equipped to satisfy the market’s demands. Today’s market environment is extremely challenging for Machinery and plant manufacturers. The central role is played by software and electronics. This demands new skills over and above those of mechanical design and construction. At the same time, development periods are becoming shorter. One response to these complex challenges is to create powerful components that are themselves able to perform as many intelligent functions as possible. Keeping these aspects in mind, Yaskawa has designed the new generation of its Sigma servo system. The current Sigma-7 series satisfies the demands and offers particularly good returns for packaging plants, semiconductor manufacturing, wood processing and digital printing machines. Rapid commissioning The amplifier software is now equipped with extensive presets that simplify and accelerate the servo drives’ commissioning. For example, the ‘tuningless’ function allows immediate use of the Sigma-7 without the need for complex parameterisation or special knowledge of control equipment. While an autotuning function ensures quick adjustment. The servo motor system supports both installation and commissioning on the hardware side too. The new 400 V version has a removable quick-coupling plug, for easy and simple wiring. Moreover, the book-style housing supports gap-free, side-by-side installation of several amplifiers in a small space. This makes it possible to realise a high performance density inside the switching cabinet. The space inside the cabinet is reduced to a minimum, allowing it and the drive electronics to be integrated in the machine. Author: Manfred Niedoba, product manager for the Drives & Motion division AUTOMATION TECHNOLOGIES 3/2016

Devices can also be connected directly from one to the next, by so-called daisy-chain wiring, which reduces installation time. An integrated real time EtherCAT interface allows easy integration in the machine environment. Taken together, all of these time-saving features considerably reduce the ‘time to market/machine’, or the interval leading up to a machine’s market launch. Algorithms maximise machine output and precision Machine output and precision are 2 main parameters that are considered to measure the servo motor’s performance in everyday production. Torque and acceleration are naturally subject to physical limits. The mechanics of high-quality motors has already approached these limits in many aspects. The motors in the Sigma-7 series are up to 20 % smaller than their predecessors while offering equivalent performance, at the same time producing considerably less amount heat. This means that they not only need less space in the machine but they are also more energy-efficient. Much more potential for efficiency is provided by the software and electronics. The Sigma-7 series has particularly powerful control algorithms. The ‘tuningless’ function, for example, ensures automatic adjustment to the load. In conjunction with an automatic vibration suppression function, it is possible to keep plants vibration-free, even when running at an inertia ratio of 30:1. The system also runs reliably under dynamic load variations. In addition, force ripple compensation ensures a high level of synchronous operation. The deft combination of 24-bit encoder resolution and powerful control performance satisfies the high standards of synchronous operation and precision. The absolute encoders guarantee both, even at low rotational speeds. Yaskawa combines the benefits of Sigma-7 drives with consistent controller solutions – from high-performance PLC to motioncontrol units. These combinations allow synchronous applications with up to 62 axes of control. In this way, the new servo drives fit well in the Yaskawa ‘Total System Solutions’ concept. Modularly coordinated products and software from the Drives & Motion, Robotics and Vipa divisions complement each other to form technically consistent automation solutions from a single source. Operational reliability and retrofitting The newly developed servo motors have been available for 200 V since 2014 and will shortly also be available for 400 V. They cover a power range of 0.5-15 kW. At the same time, this new generation reflects the experience of 25 years of development know-how and more than 9 million servo systems in the field. Operational reliability and availability are correspondingly high. The new Sigma-7 generation builds on the advantages of the previous Sigma-5 series – with enhanced safety standards (SIL3, Pl-e), double-axle modules, higher motor protection classes (IP67) and other features. It is also simple to retrofit existing systems, as the new motors are mechanically compatible with the flange dimensions of the Sigma-5 generation. The Sigma-7 series satisfies the demands and offers particularly good returns for packaging plants, semiconductor manufacturing, wood processing and digital printing machines The new Sigma-7 servo drive series from Yaskawa features intelligent functions for consistently simple and correspondingly fast commissioning and maximum machine output with high precision. Machinery and plant constructors will be able to devise powerful solutions in an increasingly competitive market environment. Photographs: Yaskawa Europe GmbH About Yaskawa Yaskawa is one of the top manufacturers of servo drives (Sigma Series), inverter drives, and industrial robots, systems engineering (medium voltage inverters, generators, converters), and IT (software-based products). It is one of the few global companies that supplies components and solutions for almost all industries from a single source. Yaskawa Europe GmbH, based in Eschborn near Frankfurt, operates 3 divisions – Drives & Motion, Robotics and Vipa – and caters to the markets of Europe, Africa, the Middle East and the region of the former Soviet Union. AUTOMATION TECHNOLOGIES 3/2016


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