Coaxial magnetic reducer-multiplier comprising mounted on bearings two shafts, a high-speed and low-speed, on which are mounted rotors with salient poles, a ferromagnetic yoke - a stator having two coaxial cylindrical surfaces with pronounced teeth and the body of non-magnetic material, wherein Both rotor made with permanent magnets and have an even number of poles - two or more, and the low-speed rotor has a pole number ratio times greater than a high-speed rotor, the stator comprises three coaxial ferromagnetic elements, between which there is a substantial axial gap and the cylindrical surface of the stator facing the rotors have the number of teeth multiple of three - three for each two rotor poles, the magnetic fluxes of high-speed rotor poles engage with all the poles of the low speed rotor through the stator, wherein one pole of a high-speed rotor (for example, S) mesh with the opposite poles of the low speed rotor (N) through one ferromagnetic stator element and the second pole-speed rotor (e.g., N) are engaged with the opposite poles of the low speed rotor (S) through the two ferromagnetic stator element, while rotating the pole grip via one or two ferromagnetic element stator alternately changing.
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