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Related Concept Videos

Electro-mechanical Systems01:19

Electro-mechanical Systems

Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
Motional Emf01:22

Motional Emf

Magnetic flux depends on three factors: the strength of the magnetic field, the area through which the field lines pass, and the field's orientation with respect to the surface area. If any of these quantities vary, a corresponding variation in magnetic flux occurs. If the area through which the magnetic field lines are passing changes, then the magnetic flux also changes. This change in the area can be of two types: the flux through the rectangular loop increases as it moves into the magnetic...
Flexural Stress01:16

Flexural Stress

When analyzing bending in symmetric members, it's crucial to understand how stresses distribute when subjected to bending moments. This stress distribution is effectively described by applying fundamental mechanics and material science principles, particularly Hooke's Law for elastic materials.
Hooke's Law states that within the material's elastic limits, stress is directly proportional to strain. In a member experiencing a bending moment, the strain at any point is relative to its distance...
Force On A Current Loop In A Magnetic Field01:17

Force On A Current Loop In A Magnetic Field

Magnetic forces on wires carrying current are most frequently applied in motors. A DC motor is a device that converts electrical energy into mechanical work. In motors, wire loops are enclosed in a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate. The direction of the current is reversed once the loop's surface area is lined up with the magnetic field, causing a constant torque on the loop. During the process, commutators...

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Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
11:44

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

Published on: August 15, 2014

A flexure-based electromagnetic linear actuator.

Tat Joo Teo1, I-Ming Chen, Guilin Yang

  • 1School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore. Singapore Institute of Manufacturing Technology, Agency for Science Technology and Research, Singapore.

Nanotechnology
|August 11, 2011
PubMed
Summary
This summary is machine-generated.

A novel flexure-based electromagnetic linear actuator (FELA) offers large displacement and high force for precise motion. This technology enables ultra-high precision layer-over-layer fabrication in nano-imprinting.

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Area of Science:

  • Mechanical Engineering
  • Nanotechnology
  • Actuator Design

Background:

  • Achieving ultra-high precision in fabrication processes like nano-imprinting requires advanced positioning systems.
  • Existing actuators often face limitations in displacement, force, or positioning accuracy.

Purpose of the Study:

  • To introduce and analyze a novel flexure-based electromagnetic linear actuator (FELA).
  • To demonstrate the FELA's capability for large displacement, high driving force, and ultra-precise positioning.

Main Methods:

  • Development of an electromagnetic driving scheme integrated with flexure-supporting bearings.
  • Analytical modeling of the electromagnetic and flexure mechanisms.
  • Experimental validation using a FELA prototype.

Main Results:

  • The FELA prototype achieved a 4 mm stroke with ±10 nm positioning accuracy.
  • Direct force control yielded force profiles with a force-current ratio of 60 N/A and ±0.3 N accuracy.
  • Demonstrated infinite positioning resolution and highly repeatable motion.

Conclusions:

  • The developed FELA presents a promising solution for ultra-high precision layer-over-layer fabrication.
  • Its capabilities in displacement, force, and accuracy meet the demanding requirements of nano-imprinting.