To provide an electromagnetic rotation system combined with a magnetic excitation and a current excitation.

Adjacent magnetic salient poles are mutually formed as magnetically independent ones, and a permanent magnet is disposed with a magnetization in the peripheral direction at the side of a magnetic salient pole in the peripheral direction thereof. The salient poles having magnets of different magnetizing directions at both sides are divided to two groups according to the magnetizing directions. A flux content linked with an armature coil is controlled in such structure that a field-control magnetic flux is supplied between the magnetic salient poles in each group by a field-control coil wound around a rotation shaft. The system can be applied to electric motors utilizing a magnetic torque and a reluctance torque, and an efficiency in power generation can be controlled. Energy efficiency can be improved through regenerative braking when used in a mobile body. Further, the need for constant-voltage circuit, converter, and the like is eliminated by the constant-voltage generative function, thus realizing a low-cost system.

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