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Related Concept Videos

Motor Units00:46

Motor Units

62.4K
A motor unit consists of two main components: a single efferent motor neuron (i.e., a neuron that carries impulses away from the central nervous system) and all of the muscle fibers it innervates. The motor neuron may innervate multiple muscle fibers, which are single cells, but only one motor neuron innervates a single muscle fiber.
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Motor Units01:13

Motor Units

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The motor unit is a fundamental component of the neuromuscular system and plays a crucial role in coordinating muscle contractions. It consists of a somatic motor neuron, which connects and controls multiple skeletal muscle fibers, forming a single functional segment. The axon of the motor neuron branches out and establishes synaptic connections known as neuromuscular junctions with individual muscle fibers within the motor unit.
Motor units come in different sizes, with smaller units...
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Force On A Current Loop In A Magnetic Field01:17

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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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Magnetic Force On Current-Carrying Wires: Example01:22

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In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
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Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

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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.
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Torque On A Current Loop In A Magnetic Field01:13

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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...
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Wireless and Powerless Sensing Node System Developed for Monitoring Motors.

Dasheng Lee1

  • 1Department of Energy and Refrigerating Air-conditioning Engineering, National Taipei University of Technology, Taipei, Taiwan. f11167@ntut.edu.tw.

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|November 23, 2016
PubMed
Summary
This summary is machine-generated.

A new wireless, self-powered sensor node enhances motor condition monitoring in industrial settings. This reliable system overcomes harsh environments and cable damage, improving overall machinery management.

Keywords:
EM pulseSensor networksmonitoring system reliabilitymotor monitoring systemwireless and powerless sensing node

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Area of Science:

  • Mechanical Engineering
  • Electrical Engineering
  • Sensor Technology

Background:

  • Industrial motor reliability is crucial for tooling systems.
  • Harsh plant environments and damaged sensor cables compromise traditional monitoring systems.
  • Existing systems face challenges in deployment and consistent operation.

Purpose of the Study:

  • To develop a wireless and powerless sensing node for motor condition monitoring.
  • To overcome the limitations of wired sensor deployments in industrial settings.
  • To enhance the reliability of motor monitoring systems.

Main Methods:

  • Integration of a Micro Electro-Mechanical System (MEMS) sensor, signal processor, communication module, and self-powered generator into a single node.
  • Development of a specialized communication module transmitting electromagnetic (EM) pulses.
  • Utilizing induction power generated by motor shaft rotation for self-sustainability.
  • Implementation of a monitoring system with the novel sensing nodes for performance testing.

Main Results:

  • The developed sensing node is wireless and requires no external power lines.
  • Electromagnetic pulses effectively transmit sensor signals through the motor's metal casing.
  • The self-powered generator ensures continuous operation.
  • Performance tests confirmed the node's effectiveness in enhancing monitoring system reliability.

Conclusions:

  • The novel wireless, self-powered sensing node significantly improves motor monitoring reliability.
  • This technology offers a robust solution for harsh industrial environments.
  • It is a valuable tool for implementing reliable motor management programs.