DIRECT CURRENT VOLTAGE TRANSFORMER Russian patent published in 2006 - IPC H02M3/335 

FIELD: electric engineering, possible use for engineering transformers of direct current voltage with galvanic decoupling of input and output circuits.

SUBSTANCE: transformer contains input filter, output rectifier filter and power transformer, secondary winding of which is connected to inputs of output rectifier filter, while primary winding through power electronic key is connected to outputs of input filter, while control input of power electronic key is connected through synchronization circuit to output of control circuit, while input of check connection of control system through check connection circuit is connected to outputs of output rectifier filter. Check connection circuit contains decoupling transformer and auxiliary electronic key. Primary winding of decoupling transformer is bridged by demagnetizing element and connected through auxiliary electronic key to outputs of output rectifier filter, secondary winding of decoupling transformer through rectifier is connected to input of check connection of control system, while control input of auxiliary electronic key is connected to output of circuit for generation of commutation pulses. Synchronization circuit, connecting control input of power electronic key to output of control circuit, can be made in form of synchronization transformer, primary winding of which is connected to output of control circuit, and secondary winding - to control input of power electronic key. Circuit for generation of commutation pulses may be made in form of an additional secondary winding of power transformer or in form of additional secondary winding of aforementioned synchronization transformer.

EFFECT: possible manufacture of direct current voltage transformer with check connection by output voltage and galvanic decoupling of input and output circuits, provided without using optic pair by forming alternating voltage in check connection circuit, corresponding to output voltage of transformer, transferring aforementioned voltage through decoupling transformer and generating check connection voltage from it.

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