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DURApulse GS30 AC Drives from AutomationDirect

Automation-Direct has added new high-performance DURApulse GS30 drives that support several control modes including sensorless vector control, closed-loop flux vector control, and torque control in a compact package. The GS30 series expands the DURApulse family by adding internal tension control loop expanded parameter sets for greater versatility, as well as optional EtherCAT and single- or dual-port EtherNet/IP communication cards. GS30 drives support up to four independent induction motor parameter sets or control of a single AC permanent magnet motor. Sizes up to 3 hp for a 230-VAC single-phase input, 50 hp for a 230-VAC three-phase input, and 100 hp for a 460-VAC three-phase input. This series offers PID control, built-in PLC functionality, and STO capability typically found with more expensive high-performance AC drives.
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Power steering systems for warehouse and autonomous vehicles

Allied Motion has introduced the electric power steering (EPS) series for steer-by-wire warehouse vehicles, autonomous AGVs, and similar material transport vehicles. This compact system includes a fully integrated motor, gearbox, controller, and optional output pinion. It is available in three frame sizes and 16 models to cover virtually any electric steering requirement in applications from small pallet lifters to AGVs/AGCs to multi-ton reach trucks. An optional, patent-pending feature, Turning Wheel Absolute Position Control, allows the controller to know the turning wheel position without external sensors.
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New brushless motors maximize power density

Allied Motion Technologies has introduced the KinetiMax 95 High Power Drive (HPD), an outer-rotor brushless motor. This frameless motor is designed to maximize power density for its volume with a nominal output torque of 2 Nm at 2,300 RPM, resulting in 480 W of continuous output power. At only 37 mm axial length, this compact stator-rotor set is an ideal solution for applications such as material handling systems, AGVs, mobile robots, handheld power tools, and more.
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Compact rod motors: Effective linear thrust generation

RDM-A Series rod motors from Akribis Systems are great for space-constrained applications requiring high motor forces and smooth linear motion. These compact motors feature a tubular design to distribute magnetic flux evenly along the circumference of the stator. They achieve continuous forces from 2.1 to 137.8 N and peak forces from 6.2 to 413.4 N. An air gap between the coil and magnet track enables non-contact axial linear movement and steady force production over the length of the stroke, and ironless construction ensures cog-free motion.
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NORD's heavy-duty drive systems tackle tough industrial applications

Industrial gear units from NORD DRIVE-SYSTEMS are used for a variety of heavy-duty applications, providing high output torques and long service life with minimal maintenance. Combining high-efficiency motors and dynamic VFDs, users get high performance and smooth operation. Learn which drive systems are used for which real-world applications in industries including grain, cranes and hoists, wastewater, food and beverage, and bulk material handling. Good info here.
Read the full article.

XYZ nanopositioning stage for scanning and positioning in photonics and microscopy

PI's P-616 XYZ Piezo Nanoposition-ing Stage, based on a parallel-kinematic design, features a single, lightweight moving platform for all three axes. It offers high precision (sub-nanometer resolution) and dynamics in a compact package. Known as the NanoCube^®, it is the smallest and lightest system with capacitive feedback, providing a 100-µm linear travel range in three degrees of freedom.
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Robot with longer reach handles heavier payloads

The new RV-35/50/80FR robot series from Mitsubishi Electric Automation is ideal for handling large workpieces and heavy objects. This series has a max reach of almost 83 in. (2,100 mm) and a max payload over 175 lb (80 kg), so it's a great solution for palletizing and machine tending. These robots have a wide range of safety functions, including position and speed monitoring, and simplified installation and programming when paired with Mitsubishi Electric's MELFA Smart Plus card.
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Linear servo press solutions from Tolomatic

Improve your pressing systems with electric linear actuators from Tolomatic. While hydraulic presses are a traditional choice in many manufacturing applications, a new generation of high-force Linear Servo Press technologies is now replacing high-maintenance hydraulics. They offer significant advantages in precision, programmability, energy efficiency, reliability, and flexibility.
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Tech Tip: What is a stepper motor linear actuator?

What is a stepper motor linear actuator (SMLA), what types are available, and what can they do for your linear motion designs? Find out in this informative Thomson video. Learn how precision lead screws can be combined with a stepper motor in a number of ways, and discover which type can benefit your linear motion applications.
View the video.

Brakes for high-speed SCARA robots and more

Precise positioning of semi-conductor wafers during SCARA assembly operations requires instantaneous braking and holding power while minimizing heat in the system. The latest compact and slender Miki Pulley BXR-LE brake models provide the needed, perfectly controlled braking in a confined area of the system using minimal power. The braking response and holding power of this power-off engaged brake makes it ideal for this and other high-speed applications. The BXR-LE brake uses 24 VDC for a split second to overcome compression spring inertia to open the brake, then consumes only 7 VDC by utilizing the BEM power control module.
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Automated piece-picking solution

The MI.RA/ OnePicker is a new and fully automated intelligent piece-picking solution from Comau. The easy-to-use, AI-backed, and collaborative solution reduces upstream process times, saving time, energy, and resources for warehouse, e-commerce, and other applications while increasing overall productivity and cost efficiency. Designed to autonomously pick miscellaneous objects from the same bin, it's a smart way to eliminate unsustainable sorting activities. Comes with Comau's Racer5 six-axis cobot.
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Unlock cost savings: Revolutionary GAM GPL Gearbox

The GPL planetary gearbox, when paired with your preferred servo motor, delivers a solution that can match the fit and performance of direct drive motors while offering significant cost savings. With <6 arcsec backlash, GAM says this gearbox outperforms all other zero-backlash gearboxes on the market, making it the ideal choice for your applications. Discover how one company realized significant savings by replacing multiple direct drive motors with the GPL gearbox in a modular housing.
Read the GAM application story.

Bosch Rexroth new linear motor modules

Fast, compact, and precise. These properties characterize the new linear motor modules (LMM) with integrated screw-free direct drive from Bosch Rexroth. The axes are available in sizes 140, 180, and 220 mm and feature a zero-backlash direct drive. They complement the existing linear motion technology portfolio as a ready-to-install solution offering excellent value for money. The linear motor modules are available in all sizes with iron-core linear motors. Standard strokes are up to 1,540 mm and forces up to 2,400 N.
Learn all the specs and options.

OnRobot doubles payload capacity of its grippers

OnRobot's new 2FG14 and 3FG25 electrical grippers for heavy-duty, collaborative applications are now launching along with the new machine tending solution AutoPilot powered by D:PLOY, developed in collaboration with Ellison Technologies. The new three-fingered 3FG25 gripper provides users with 25 kg (55.1 lb) of payload power in a compact, all-electric, lightweight form, unlocking the potential of the latest cobots. Ideal for CNC machine tending, the 2FG14 is a lightweight parallel-finger gripper with a payload of 14 kg (30.8 lb). It doubles the payload and gripping force of OnRobot's popular 2FG7 gripper while also providing 30% more total stroke.
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Linear guide system corrects misalignments

Bishop-Wisecarver's UtiliTrak^® linear guide system includes vee rails for precision and open rails for misalignment float to provide smooth and accurate motion on inaccurate structures. Because precise parallelism is difficult to achieve, it is not uncommon for mounting surfaces to be slightly out of parallel. UtiliTrak's design compensates for mounting errors and does not require absolute parallelism for accurate operation. Genius.
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OSU research shows how hackers can target smart meters to destabilize electricity grid

Researchers in the Oregon State University (OSU) College of Engineering have shown that a power transmission grid can be destabilized by hackers who manipulate smart meters to create an oscillation in electricity demand.

Their findings were published in IEEE Access.

The study is important because understanding where a grid's vulnerabilities lie and what they look like is the first step in designing protection mechanisms, says associate professor of electrical engineering and computer science Eduardo Cotilla-Sanchez, who led the project with graduate student Falah Alanazi.

A smart meter is a digital device that collects electricity usage data and sends it to a local utility through a telecommunications connection. The meters can help customers learn more about their electricity use, and they can also be used to remotely shut off customers' power, such as in the case of unpaid bills.

OSU Ph.D. student Thabiso Mabote, left, and College of Engineering faculty member Eduardo Cotilla-Sanchez put caution tape around a machine testbed. Machine testbeds are useful to validate machine dynamics in a time-domain simulation such as was used in the smart meter research. [Credit: Photo provided by Eduardo Cotilla-Sanchez]

 

 

 

 

Like circuit breakers in a household panel, power grid components can "trip" and shut off when demand, or load, is too high or problematic for some other reason. The result is load being passed on to other parts of the grid network, which may also shut down, creating the possibility of a domino effect that can lead to a blackout.

In this study, conducted with OSU College of Engineering associate professor Jinsub Kim, researchers used a model known as a time-domain grid protection simulator to demonstrate how causing load to vary back and forth in a regular pattern -- known as a load oscillation attack -- can compromise transmission.

"New technologies have been introduced to make our aging electricity infrastructure more efficient and more reliable," Cotilla-Sanchez said. "At the distribution level, upgrades have included communication systems, distribution automation, local control and protection systems, and advanced metering infrastructure. The bad news is, the upgrades also introduce new dimensions for attacking the power grid."

One of the types of attacks made possible by the new technologies involves hacking into the advanced metering infrastructure, often abbreviated as AMI, and controlling the smart meter switches to cause load oscillations.

"Imagine calling everyone you know and saying, 'OK, at 6 p.m. we are all going to turn the lights on," Cotilla-Sanchez said. "Even if you got a couple thousand people to do that, it would be unlikely to cause much instability because the grid is able to absorb fairly big changes in supply and demand -- for example solar panels at the end of the day do not produce electricity and we are able to anticipate and compensate for that.

"But if a person were to remotely coordinate a large number of smart meters to switch customers on and off at a particular frequency, that would be a problem."

That type of incident would start with someone performing reconnaissance by "poking" a couple of locations in a grid and using the information gained to estimate the grid's destabilizing oscillation frequency, he said. After determining which customer meters to turn on and off at that frequency -- less than 1 Hertz or cycle per second -- the attacker would be ready to launch an assault. What's more, comparatively speaking, an attack doesn't need to involve that many meters.

"We juxtaposed our work with related recent grid studies and found that a well-crafted attack can cause grid instability while involving less than 2% of the system's load," Cotilla-Sanchez said.

The findings, while unsettling, provide a jump-off point for grid operators to develop countermeasures, he added.

"For example, if they detect this type of oscillation on the load side, they could take lines A and B out of service, intentionally islanding the affected area and thus avoiding propagation of the instability to a broader area of the grid," he said. "Another solution, which could be complementary, might be to change the generation portfolio enough -- for example, curtail some wind generation while ramping up some hydro generation -- so the overall dynamic response is different to what the attack was designed toward, so the impact will be smaller and won't be enough to tip the system."

Either technique, he said, will require additional research and development to serve as an effective mechanism of protection, "but understanding the nature of possible attacks, I would say, is a good start."

Source: Oregon State University

Published May 2023

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