IMPROVED DIAGNOSTICS FOR MULTI-LEVEL MEDIUM-VOLTAGE DRIVE USING MECHANICAL BYPASS Russian patent published in 2018 - IPC G01R31/02 H02M7/483 H02P27/08 

FIELD: electrical engineering.

SUBSTANCE: invention can be used in medium-voltage drives. In a system and method for performing diagnostics in a medium-voltage drive, the bypass mechanism is operably connected to the output terminals of a power cell and is configured to create a shunt path between the output terminals. Bypass mechanism includes a communication interface configured to transmit a bypass signal to a communication interface associated with the power cell in response to a state change. Method of performing diagnostics includes a controller transmitting an input voltage to a bypass mechanism of the power supply, thereby causing a state change of the bypass mechanism. Controller receives a signal from the power cell, wherein the signal indicates the power cell has detected the state change of the bypass mechanism. Controller then determines if the power cell is correctly associated with the bypass mechanism.

EFFECT: technical result is higher accuracy of detecting bypass operations, failure or incorrect connections in the power cell.

12 cl, 6 dwg