4. Conclusion

A variable reluctance machine always includes ferromagnetic materials whose geometric shape modifies the configuration of the magnetic field produced by one or more windings. Electromechanical conversion is possible when the spatial arrangement of ferromagnetic materials and windings obeys certain topological rules. The resulting machine structures are highly varied, making it possible to offer variable reluctance solutions for a wide range of applications, from high-speed machines with massive rotors, to very slow torque motors, and a whole range of actuators, sensors and even generators.

Stepper motors are currently by far the most widespread industrial application. Most often of low power, they are found in robotics, household appliances, the automotive industry and many other sectors. Torque motors are also widely used (winches, traction drives, etc.) for torques...