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Actuators | Free Full-Text | Design, 3D FEM Simulation and Prototyping of a Permanent Magnet Spherical Motor
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An Orientation Measurement Method Based on Hall-effect Sensors for Permanent Magnet Spherical Actuators with 3D Magnet Array | Scientific Reports
![electromagnetism - What would electromagnetic field of concentric ball magnets look like? - Physics Stack Exchange electromagnetism - What would electromagnetic field of concentric ball magnets look like? - Physics Stack Exchange](https://i.stack.imgur.com/FQ0JZ.jpg)
electromagnetism - What would electromagnetic field of concentric ball magnets look like? - Physics Stack Exchange
Is it possible to have a spherical magnet with the pole at the center so that two such magnets with reverse polarity will always attract even when rolled? Kind of like a
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