Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Induction01:16

Induction

4.2K
An emf is induced when the magnetic field in a coil is changed by pushing a bar magnet into or out of the coil. emfs of opposite signs are produced by motion in opposite directions, and the directions of emfs are also reversed by reversing poles. The same results are produced if the coil is moved rather than the magnet—it is the relative motion that is important. The faster the motion, the greater the emf. Additionally, there is no emf when the magnet is stationary relative to the coil.
A...
4.2K
Ferromagnetism01:31

Ferromagnetism

2.5K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.5K
Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

1.4K
In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
1.4K
Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

4.7K
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...
4.7K
Magnetic Force On Current-Carrying Wires: Example01:22

Magnetic Force On Current-Carrying Wires: Example

1.6K
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.
1.6K
Force On A Current Loop In A Magnetic Field01:17

Force On A Current Loop In A Magnetic Field

3.4K
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,...
3.4K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Effect of Channel Height on CO<sub>2</sub>-to-CH<sub>4</sub> Reduction in Microchannel Electrocatalysis.

Micromachines·2026
Same author

Editorial for the Special Issue on MEMS/NEMS Devices and Applications, 3rd Edition.

Micromachines·2026
Same author

High sensitivity chemiresistive biosensor prepared via enzyme-catalyzed redox and nanoparticle conduction network.

Microsystems & nanoengineering·2026
Same author

Investigation of radiation doses to the eyes of patients and medical staff during a videofluoroscopic swallowing study: a phantom study.

Radiological physics and technology·2025
Same author

Effect of peracetic acid cleaning agents on biofilms by Methylobacterium spp. derived from hemodialysis equipment.

Journal of microorganism control·2025
Same author

Investigation towards nanomechanical sensor array for real-time detection of complex gases.

Microsystems & nanoengineering·2025

Related Experiment Video

Updated: Sep 13, 2025

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
06:45

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Published on: October 28, 2022

1.8K

Measuring the Operating Condition of Induction Motor Using High-Sensitivity Magnetic Sensor.

Akane Kobayashi1, Kenji Nakamura2, Takahito Ono1,3

  • 1Department of Mechanical Systems Engineering, Tohoku University, Sendai 980-8579, Japan.

Sensors (Basel, Switzerland)
|July 30, 2025
PubMed
Summary

A single magnetic sensor can monitor induction motor (electromagnetic motor) operating states by analyzing magnetic signals. This non-contact method offers a promising approach for future anomaly detection and advanced data analysis.

Keywords:
induction motorsmagnetic sensornon-contact monitoringpowertorque

More Related Videos

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.7K
Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
06:17

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors

Published on: January 16, 2020

5.8K

Related Experiment Videos

Last Updated: Sep 13, 2025

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
06:45

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Published on: October 28, 2022

1.8K
Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.7K
Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
06:17

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors

Published on: January 16, 2020

5.8K

Area of Science:

  • Electrical Engineering
  • Electromagnetism
  • Sensor Technology

Background:

  • Monitoring electromagnetic motor health is crucial for minimizing operational losses.
  • Current anomaly detection methods face challenges like limited training data and the need for multiple sensors.
  • Non-contact monitoring offers a potential solution to these limitations.

Purpose of the Study:

  • To investigate the feasibility of using a single magnetic sensor for monitoring induction motor operating states.
  • To explore the relationship between magnetic flux density and motor operational parameters.
  • To establish a foundation for future anomaly detection systems.

Main Methods:

  • Utilized a highly sensitive magnetic sensor for non-contact measurement of magnetic signals from an induction motor.
  • Acquired diverse motor operating states through magnetic signal analysis.
  • Investigated the correlation between magnetic flux density and motor conditions such as rotation frequency, torque, and output power.

Main Results:

  • The magnetic spectrum derived from the motor's magnetic signals contains discernible information about its operating state.
  • Key operational parameters including rotor rotation frequency, torque, and output power were successfully correlated with magnetic spectrum data.
  • Demonstrated that a single magnetic sensor can effectively capture comprehensive motor operating condition data.

Conclusions:

  • A single, non-contact magnetic sensor is a viable tool for monitoring induction motor operating conditions.
  • The magnetic spectrum analysis provides valuable insights for advanced data analysis and potential anomaly detection.
  • This approach reduces the need for multiple sensors and addresses data limitations in machine learning applications.