ADAPTIVE SYNCHRONISATION DEVICE Russian patent published in 2010 - IPC H02M1/08 

FIELD: electricity.

SUBSTANCE: adaptive synchronisation device represents self-oscillating cascade with frequency-width-pulse modulating, operating in mode of external synchronisation with grid voltage frequency. Device comprises source of synchronisation signal (not indicated) - "input" of synchronisation device, the second relay element (1), proportional-differentiating link (2), summator (3), integrator (4) and the first relay element 5. Synchronisation device has higher reliability and accuracy of operation under condition of non-stationary parameters of grid voltage due to synchronisation of self-oscillating channel of synchronisation device with combined signal, representing sum of signals from outlet of the second relay element and harmonic coupling of grid, and also proportional-differentiating link.

EFFECT: improved noise immunity to pulse noise from the side of synchronisation voltage.

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