SINGLE-PHASE INVERTER OPERATION MONITORING UNIT Russian patent published in 2015 - IPC G01R21/00 

FIELD: electricity.

SUBSTANCE: device contains a DC source, an inverter, voltage and current sensors, a load, two analogue remultipliers with LF filters. The device is also fitted with a 90 degree phase shifter, a circuit of series connected HF filter, the rectifier and LF filter, two analogue dividers, cosφ and sinφ indicators, the threshold unit, sinφ polarity identifier unit, the vector sum module evaluator, the two-threshold comparator and blocks of indication of character of loading, overload on the jet power and malfunction of the control unit. The adding of additional elements has allowed to provide comprehensive and evident monitoring of the inverter operation, to improve reliability of information on a load connected to the inverter, timely inform the service personnel on the inverter overload. The device is fitted with self-checking circuits improving its reliability.

EFFECT: small hardware costs, insignificant dimensions and weight.

1 dwg