January 1, 1993IEEE Transactions on Magnetics
Instantaneous magnetic field distribution in brushless permanent magnet DC motors. I. Open-circuit field
Authors
Discussion
Loading...
Member takes
Implication
Analytical modeling demonstrates accurate open-circuit magnetic field calculation in radial-field brushless DC motors, indicating a viable alternative to finite element computation.
Key Points
- To establish a two-dimensional analytical framework for predicting the open-circuit instantaneous magnetic field distribution across the airgap in radial-field brushless permanent magnet DC motors.
- Solved 2D governing electromagnetic field equations in polar coordinates within the annular airgap and magnet domain of multipole slotless motors.
- Modeled both internal and external rotor configurations under assumptions of uniform radial magnetization and constant relative recoil permeability.
- Validated the analytical field solutions by comparing results directly against numerical finite element analyses across multiple radial-field motor designs.
- Obtained explicit analytical equations for the instantaneous open-circuit radial and tangential magnetic field distributions across the airgap region.
- Achieved close quantitative agreement between the analytical calculations and numerical finite element predictions across various motor topologies without empirical fitting.
Cite This Study
Zhu et al. (1993) studied this question.