VISCOUS FERROMAGNETIC MOTOR Russian patent published in 2009 - IPC H02N11/00 

FIELD: electricity.

SUBSTANCE: proposed motor can be used in power engineering. The motor contains a ferromagnetic circular rotor, inside of which there is an immovable magnet with a linear shape, and outside - two C-shaped permanent magnets. The permanent magnetic viscosity τ of the material of the rotor, radius R and angular speed ω are linked by the expression τ=0.186 X₀/ω R, where X₀ is the average distance between poles of the C-shaped magnets. The motor is started by external winding of the rotor to angular speed ω_start>0.186 X₀/τ R. A sensor is fitted on the rotor, linked to a receiver (magnetic or optical sensor-receiver pair). On the C-shaped magnets, there are magnetising coils, connected in series to a direct current source, the control input of which is connected to the circuit for automatic control from the series-connected with the output of the above mentioned receiver a pulse former, D flip-flop, phase detector, low pass filter and a direct current amplifier. The second input of the phase detector is connected to a circuit of reference signal from series connected reference generator and comparator.

EFFECT: possibility of automatic stabilisation of speed of rotation of the rotor of the motor in varying work load mode.

2 cl, 6 dwg