Magnetic Coupler: Ansys Maxwell Magnetostatic Torque vs Angle
Introduction
Hello everyone, David Giglio here with Ozen Engineering, Inc. In this video, I will show you how to model a magnetic coupler in ANSYS Maxwell using the Magneto Static Solver.
Project Overview
In this project, I define a variable called theta which has a nominal value of 0 degrees. I use a sweep definition where theta varies from 0 degrees to 90 degrees with a step value of 2.5 degrees.
Magnet Configuration
- The magnets are shown in two different colors:
- Orange Magnets: B field points in the positive Z direction.
- Blue Magnets: B field points in the negative Z direction, with a Z component value of -1.
- The B field distribution is an 8-pole field, alternating on the top of the stator magnets.
Torque Analysis
In the initial position, the B field is maximized across all magnet pairs regarding the rotor and stator, resulting in zero torque due to symmetry. As we rotate the rotor:
- Adjacent unlike poles attract, inducing a negative torque.
- Like poles repel, also inducing a negative torque.
- At 22.5 degrees, the rotor magnet is between stator magnets, minimizing the B field and resulting in zero torque.
- Further rotation induces a positive torque due to repelling forces between like poles.
- At 67.5 degrees, torque is maximized positively.
Results
When plotting torque versus angle, the following observations are made:
- Initially, like magnets are aligned, resulting in zero torque.
- As rotation continues, unlike poles attract, inducing negative torque.
- At 45 degrees, unlike magnets are aligned, and like poles repel, resulting in zero torque.
- Further rotation results in positive torque due to repelling forces.
Simulation Setup
The model is set up with the following parameters:
- Rotor objects, including magnets and core, are assigned a rotate geometry operation using the theta variable.
- Torque parameter is assigned using virtual torque definition, suitable for permanent magnets.
- Positive Z-axis is used as the reference for rotation.
Conclusion
This is not an actual motion simulation; rather, it models how torque varies with changes in the rotor's position. By varying parameters such as magnet dimensions, we can analyze how torque and field distribution change. For power performance analysis, a magnetic transient solver would be necessary.
Contact us to learn about our simulation capabilities and request a demonstration. We provide training to use ANSYS tools and offer consulting services. Thank you very much, and have a nice day.
Hello everyone, David Giglio here with Ozen Engineering. In this video, I show you how to model a magnetic coupler in ANSYS Maxwell using the Magnetostatic Solver. In this project, I define a variable called theta with a nominal value of 0 degrees.
I use a sweep definition where theta varies from 0 to 90 degrees with a step value of 2.5 degrees. The magnets are shown in two different colors: orange and blue.
The orange magnets are defined such that the B field points in the positive Z direction, while the blue magnets are aligned in the negative Z direction. The material properties show the Z component as -1 for the blue magnets and as 1 for the orange magnets, indicating the direction of the B field.
The B field distribution is an 8-pole field, with poles alternating on the top of the stator magnets. As the rotor rotates, the adjacent poles attract or repel each other, inducing a negative or positive torque.
The rotor objects, including all the rotor magnets and the core, are assigned a rotate geometry operation using the theta variable. The simulation solves all torque values and field distributions for all angle variations.
I vary the angular value of the mechanical angle of the rotor to see how the torque and field distribution change. Although this is not an actual motion simulation, it allows us to analyze how torque depends on the magnetic field and the position of the magnets in this model.
Contact us to learn about our simulation capability and request a demonstration. We provide training to use ANSYS tools and offer consulting services. Thank you very much and have a nice day.
