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

Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

5.2K
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...
5.2K
Force On A Current Loop In A Magnetic Field01:17

Force On A Current Loop In A Magnetic Field

3.7K
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...
3.7K
Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

3.7K
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.
3.7K
Magnetic Flux01:18

Magnetic Flux

4.1K
The magnetic flux measures the number of magnetic field lines passing through a given surface area. The SI unit for magnetic flux is the weber (Wb). Magnetic flux is a scalar quantity. It depends on three factors: the strength of the magnetic field B, the area through which the field lines pass, and the relative orientation of the field with the surface area.
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...
4.1K
Magnetic Force Between Two Parallel Currents01:13

Magnetic Force Between Two Parallel Currents

4.1K
Two long, straight, and parallel current-carrying conductors exert a force of equal magnitude on one another. The direction of the force depends on the current direction in the conductors.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and  the vector product of the length vector along the current element and the field due to the first conductor. According to the...
4.1K
Biasing of FET01:22

Biasing of FET

450
Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
450

You might also read

Related Articles

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

Sort by
Same author

Embedded 3D Printing of Newtonian Fluids in Elasto-viscoplastic Matrix.

ACS applied materials & interfaces·2025
Same author

<i>Faecalibacterium prausnitzii</i> A2-165 metabolizes host- and media-derived chemicals and induces transcriptional changes in colonic epithelium in GuMI human gut microphysiological system.

Microbiome research reports·2024
Same author

Extracorporeal Blood Pump driven by a Novel Bearingless Split-Tooth Flux-Reversal Motor.

IEEE/ASME transactions on mechatronics : a joint publication of the IEEE Industrial Electronics Society and the ASME Dynamic Systems and Control Division·2024
Same authorSame journal

A 6-DoF position sensor for bearingless slice motors.

IEEE transactions on industrial electronics (1982)·2024
Same author

An immune-competent human gut microphysiological system enables inflammation-modulation by Faecalibacterium prausnitzii.

NPJ biofilms and microbiomes·2024
Same author

Piezo-deformable mirrors for active mode matching in advanced LIGO.

Optics express·2022
Same journal

SAPM: Self-Adaptive Parallel Manipulator with Pose and Force Adjustment for Robotic Ultrasonography.

IEEE transactions on industrial electronics (1982)·2023
Same journal

Improved Extended Kalman Filter Estimation using Threshold Signal Detection with a MEMS Electrostatic Microscanner.

IEEE transactions on industrial electronics (1982)·2021
Same journal

Piezoelectric Floating Element Shear Stress Sensor for the Wind Tunnel Flow Measurement.

IEEE transactions on industrial electronics (1982)·2021
Same journal

Optimal Design of a Resonance-Based Voltage Boosting Rectifier for Wireless Power Transmission.

IEEE transactions on industrial electronics (1982)·2017
Same journal

Adaptive Kinematic Control of a Robotic Venipuncture Device Based on Stereo Vision, Ultrasound, and Force Guidance.

IEEE transactions on industrial electronics (1982)·2017
See all related articles

Related Experiment Video

Updated: Nov 12, 2025

Magnetic Adjustment of Afterload in Engineered Heart Tissues
09:40

Magnetic Adjustment of Afterload in Engineered Heart Tissues

Published on: May 5, 2020

6.1K

Homopolar Bearingless Slice Motor with Flux-biasing Halbach Arrays.

Minkyun Noh1, David L Trumper2

  • 1Department of Mechanical Engineering, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada.

IEEE Transactions on Industrial Electronics (1982)
|March 22, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a novel bearingless slice motor design that levitates and rotates a steel reluctance rotor. This innovative motor configuration achieves stable suspension and efficient torque generation, paving the way for advanced electromechanical systems.

Keywords:
Bearingless motorsflux-biasinghomopolar machinesslice motors

More Related Videos

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
09:43

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

Published on: November 7, 2017

9.7K
A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
08:23

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

6.5K

Related Experiment Videos

Last Updated: Nov 12, 2025

Magnetic Adjustment of Afterload in Engineered Heart Tissues
09:40

Magnetic Adjustment of Afterload in Engineered Heart Tissues

Published on: May 5, 2020

6.1K
Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
09:43

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

Published on: November 7, 2017

9.7K
A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
08:23

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

6.5K

Area of Science:

  • Electrical Engineering
  • Electromechanical Systems
  • Motor Drives

Background:

  • Bearingless motors offer advantages in applications requiring contactless operation.
  • Reluctance motors are known for their robustness and cost-effectiveness.
  • Integrating levitation and rotation in a single device presents unique design challenges.

Purpose of the Study:

  • To develop and validate a new bearingless slice motor configuration.
  • To achieve stable levitation and rotation of a reluctance rotor.
  • To investigate the torque-current characteristics and suspension performance.

Main Methods:

  • A novel motor configuration utilizing Halbach magnet arrays for bias flux.
  • Passive stabilization of axial and tilting degrees of freedom.
  • Active feedback control for radial stabilization.
  • Design, construction, and testing of a prototype motor and control system.

Main Results:

  • Achieved a torque constant of 14.9 mNm/A.
  • Demonstrated a maximum speed of 5500 rpm.
  • Obtained a suspension bandwidth of 84 Hz with a phase margin of 11.3 degrees.
  • Measured passive stiffnesses of 15.3 N/mm (axial) and 34.4 mNm/deg (tilting).

Conclusions:

  • The presented bearingless slice motor design successfully levitates and rotates a reluctance rotor.
  • The motor exhibits performance comparable to permanent-magnet synchronous machines in terms of torque-current relationship.
  • The prototype validates the feasibility of this configuration for advanced applications requiring contactless rotation.