APPARATUS AND METHOD FOR DETECTING OUTPUT PHASE DEFICIENCY IN INVERTER

摘要

An apparatus and a method for detecting phase deficiency in an inverter is provided, the method including deciding whether a sector of the output current is a sector where current detection is possible based on switching operation status of the switching element in the inverter, maintaining a phase deficiency variable when deciding the current detection in the sector of the output current to be impossible, adding a count to a phase deficiency variable to accumulate when deciding the current detection in the sector of the output current to be possible and deciding the output current to be within a phase deficiency band, and determining as phase deficiency when the phase deficiency variable is greater than a prescribed detection level.

主权项

1. A method for detecting phase deficiency of output current, by receiving output current from a leg-shunt resistor in an inverter including a plurality of switching elements, the method comprising:
deciding whether a sector of the output current is a sector where current detection is possible based on switching operation status of the switching element in the inverter; maintaining a phase deficiency variable when deciding the current detection in the sector of the output current to be impossible; adding a count to a phase deficiency variable to accumulate when deciding the current detection in the sector of the output current to be possible and deciding the output current to be within a phase deficiency band; and determining as phase deficiency when the phase deficiency variable is greater than a prescribed detection level.