Part 1 of this article series looked at what to consider when selecting motor connection cables, output reactors, braking resistors, line reactors and line filters. Part 2 continues by looking at the differences between VSDs/ VFDs and servo drives, reviewing uses for AC and DC rotary and linear servo motors, considering where soft start-stop units fit into industrial operations, and Looking at how DC converters are used to power peripherals like sensors, human-machine interfaces (HMIs), and safety devices. Variable speed drives and variable frequency drives (VSDs/VFDs) are essential to maximizing industrial operations' efficiency and sustainability, but they’re not the only tools available. To get the ultimate performance, VSDs/VFDs often need to be supplemented by other devices like servo drives and motors, soft start-stop units, direct current (DC) converters, and direct current (DC) input uninterruptible power supplies (UPS) to arrive at an optimal industrial automation architecture. AC and DC servo motors and drives are suited for various applications, from simple 1- or 2-axes tasks to complex tasks with 256 or more axes of motion. Servo motor- controlled actuators provide precise and repeatable movements for industrial machines and are available with rotary and linear motion configurations.
Constant speed applications like conveyors, pumps, and overhead cranes can often benefit from using soft start-stop units instead of VSDs/VFDs. Depending on the application requirements, designers can select between redundant DC power supplies, a Class 2 power supply as defined in the U.S. National Electric Code (NEC), or a DC UPS to handle unpredictable mains power and improve system reliability. This article begins with a look at the differences between VSDs/ VFDs and servo drives, reviews uses for AC and DC rotary and linear servo motors, and considers where soft start-stop units fit into industrial operations. It continues by reviewing how DC converters are used to power peripherals like sensors, human-machine interfaces (HMIs), and safety devices. It examines when to use a redundant DC architecture or a DC UPS to power those devices and the choice between battery and supercapacitor energy storage. Representative devices from Schneider Electric, Omron, Lin Engineering, and Siemens are presented in each case.
Servo motor systems can complement VSDs/VFDs in
industrial automation architectures. Servo motor systems are designed for complex and dynamic motion systems and can support precise positioning. Servo drives are used with permanent magnet motors
we get technical
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