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17 Engineering a More Sustainable Future | ADI VISIT ANALOG.COM 5 Precision Measurement Complex motion control requires precision converter technologies for high qual- ity current feedback utilizing both isolated and nonisolated solutions to provide control loop performance that is both highly accurate and has fast transient response. Current feedback is the fundamental building block to enhancing drive performance and determines the overall control bandwidth and response time. Key requirements for current feedback include synchronized measurement with PWM cycle, isolated or high common-mode measurement, low offset drift to minimize torque ripple, and low latency simultaneous sampling at 14- to 18-bit resolution to measure phase currents. Precision converter technologies are also required for accurate position measurements in encoders and linear track appli- cations that can deliver greater throughput and increase productivity. Isolation and Interface Next-generation drives and motors that enable complex motion control require digital isolation technology to provide isolated data and isolated communica- tions interfaces such as RS-485, USB, and LVDS. Isolated gate drivers are also needed to drive high- and low-side power semiconductors to provide robust, safety compliant, and high reliability assets. Gate drivers convert the logic-level PWM signals to high-side referenced signals that control power transistors. High voltage inverter applications often use IGBTs, with a future trend toward SiC and GaN to increase switching frequency and/or lower switching losses. Low voltage applications typically use MOSFET-based switches. The key requirements for gate drivers include high speed, low propagation delay, low delay skew, robustness and common-mode transient immunity, switch protection features ( DESAT, Miller clamp, soft shutdown, UVLO ) , and controllable switching ( variable slew rate switching ) . Standard digital isolators play a role in many drives in transferring signals between high voltage power electronics domains and safety extra low voltage ( SELV ) domains for PWM and other signaling. Examples include isolated signaling for integrated power modules ( IPM ) . Fully integrated isolated power solutions can also be combined with digital isolators or other isolated functions to provide significant solution size reduction compared to a discrete transformer solution. Industrial Ethernet Industrial Ethernet connectivity with sub-ms cycle times network performance is required for deterministic real-time communication in motion control applica- tions ( servos and drives ) . Robust physical layer devices at 100 Mb and Gb speeds combined with layer 2 Industrial Ethernet protocols such as EtherCAT, PROFINET, EtherNET/IP, and IEEE time sensitive networking ( TSN ) ensure deterministic Ethernet connectivity. Next-generation designs are moving to Gb TSN on converged networks with multiple traffic types, cyclic communications for control, and acyclic communications for best effort traffic ( for example, vision and monitoring traffic ) . Low latency Industrial Ethernet solutions are required to reduce cycle times in multi-axis applications. These deterministic motion solutions enable more complex motion applications that drive higher levels of manufacturing productivity and flexibility. Magnetic Sensing Magnetic sensing based on anisotropic magnetoresistance ( AMR ) position sensor solutions enables robust and accurate position sensing for encoder applications. Position feedback is used for direct position control or for inferring rotational speed and implementing machine speed control in servo drives. Magnetic sensing provides a lower cost solution compared to optical encoders and a more robust solution in industrial applications that are subject to dust and vibration. Power Management Intelligent motion applications are typically deployed in harsh industrial environ- ments where high ambient temperature operation is required, along with immunity to conducted noise and high voltage transients. In some decentralized applica- tions, drives are located closer to the motor in smaller enclosures and, in other applications, the drive is integrated with the motor. Higher power density power management solutions that operate at high ambient temperatures are required to enable these smaller form factor intelligent motion applications. Machine Health Machine health uses vibration and shock sensors to enable real-time condition monitoring of an asset's health to eliminate unplanned downtime, extending the asset's useable lifetime while also reducing maintenance costs. By integrating machine health into motion applications, new revenue streams can be generated though digitization strategies that create new service-based business models based on guaranteed uptime to enable higher levels of manufacturing productiv- ity. Asset health data based on vibration, shock, and temperature is transformed into asset health insights by edge AI, which are then communicated via wired or wireless solutions to the management control software where they provide real-time state of health of key assets. Conclusion Agile production is required to quickly respond to changing consumer demands and support efficient production, down to a batch size of 1. Agile production is enabled by intelligent, connected assets that can be reconfigured quickly. These connected assets share data in real time; this data is used to improve operational performance by identifying bottle necks in production and by monitoring the health of assets to eliminate unplanned downtime. Smart manufacturing that is built on intelligent motion solutions consumes less energy and enables more complex motion to drive higher levels of flexibility, productivity, and sustainability. To learn more about Analog Devices' technologies and platforms for intelligent motion control and how we are helping our customers and partners accelerate higher value motion control solutions, please explore our range of solutions on the following pages or visit analog.com/intelligentmotion.