FIELD: electricity.
SUBSTANCE: invention is related to electric engineering, to systems of automatic stabilisation of direct voltage generated by direct conversion of ambient thermal energy, for example, of swimming pools, and may be used in environmentally sound power engineering. Device for automatic control of power generator comprises a ferromagnetic ring coupled mechanically to the rotation axis through beams; one part of the ring is combined with saturating magnetic field while the other one is coupled to heat-generating medium. Low-pass filter or integrator is connected in series to the control unit by magnetising and its output is connected to a bias coil. Magnetic gap of the strong permanent magnet is made of two parts, the first of which forms a uniform magnetic field with intensity providing for maximisation of magnetic response of the ferromagnetic at the length L of this part of the magnetic gap, and the second part of the magnetic gap with the length L generates a saturating magnetic field in the beginning of this part of the magnetic gap and further a magnetic field in direction of movement of the ferromagnetic ring that linearly increases by intensity to the end of the magnetic gap. The rotation axis is coupled mechanically to the rotation axis frequency meter and direct-current brushless generator connected to the load and including separate operating winding and magnetising winding. The operating winding is connected to accumulator battery, to external load, to source of reference voltage, to control unit by magnetising and to the first input of comparator. Field magnetising winding is connected to the accumulator battery through a direct-current polarity reversal switch. Output of the reference power source is connected to the second input of the comparator, which output is coupled to control input of the control unit by magnetising through low-pass filter.
EFFECT: stabilisation of direct voltage at variation of external load and increased service life and reliability.
10 dwg
