Motion Control

Tips On Selecting Custom Gearmotors

A custom gearmotor is one that meets your particular specifications. It has the correct mechanical and electrical interfaces, fits within the envelope available, meets your performance, maintenance, lifetime, and aftermarket criteria, and fits within your budget.

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Intelligent Motor Control ICs Simplify System Design

A new category of IC called an intelligent motor controller (IMC) is evolving that simplifies the task of designing high performance motor control drives. IMCs are dedicated, highspeed ICs that control multi-phase motors such as brushless DC and AC induction motors, and provide sophisticated control features required by today’s energy-efficient applications such as variable speed, flux vector control, and even sensorless control.

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Electric Actuators Deliver Energy Efficient, Low Maintenance Solutions

Machine designers and end users find themselves balancing sometimes opposing priorities such as improving energy efficiency while minimizing adverse impact on the environment, at the same time ensuring performance (e.g., precision, reliability) is not compromised. A key trend towards meeting the challenges has been to shift from hydraulic actuation towards electric actuation, especially in applications characterized by high degree of responsiveness, space constraints, high uptime/low maintenance, low energy consumption, and minimal environmental impact.

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Computer-Assisted Laser Treatment Using Real-Time Retinal Tracking

This computerized system accurately guides laser shots to diseased retinal areas. Diabetic retinopathy resulting from long-term diabetes mellitus is one of the common diseases that leads to choroidal neovascularization (CNV), a leading cause of blindness. Among the currently available treatment methods, a laser can be used to photocoagulate the diseased areas. Several thousand laser shots are usually required during such treatment. Special care must be taken to avoid hitting the blood vessel tree, the macula, the optic disk, and the region among them. For a single eye, this procedure requires up to several hours that are usually divided over many treatment sessions. Consequently, the development of an accurate laser treatment guidance system to treat the whole retina in one session would improve the effectiveness of such procedures.

Posted in: Bio-Medical, Briefs, TSP, Briefs, TSP, Lasers & Laser Systems, Photonics

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Introduction to Linear Actuators

Students trained in classic mechanical engineering are taught to construct a system using conventional mechanical components to convert rotary into linear motion. Converting rotary to linear motion can be accomplished by several mechanical means using a rotary motor, rack and pinion, belt and pulley, and other mechanical linkages, which require many components to couple and align. Although these methods can be effective, they each carry certain limitations.

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Fluid Handling Products Gain in Performance, Efficiency

Today’s pumps, valves, and flow meters are being designed with greater accuracy and flexibility to handle a wide range of fluids, chemicals, and other materials. Demands for more reliable operation and lower energy usage dictate these parts be made of materials lighter than previously available, yet robust enough for high pressure, high duty cycle applications.

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Hermetic Feedthroughs Critical for Flywheel Energy Storage

Next-generation flywheels are made possible by advances in material science in rotor technology, as well as the application of magnetic bearings running in a vacuum environment. While the movement of the rotating flywheel into a vacuum eliminates parasitic drags, such as windage friction losses, mechanical bearings are not suited to operate in a vacuum or for the high speed requirements of the new designs.

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