CYCLE-BY-CYCLE CURRENT LIMITING METHOD AND DEVICE, AND INVERTER CIRCUIT

摘要

A cycle-by-cycle current limiting method and device, and an inverter circuit, which are used to solve the problem that when an existing cycle-by-cycle current limiting method is utilized to wave-seal an inverter, wave sealing of all of switching tubes may lead to a high-voltage failure in a bus and may also affect the capability of the inverter in supplying power to a load. The method comprises: determining a current on an energy storage inductor in an inverter to be greater than or equal to a current at a first current limiting point and smaller than a current at a second current limiting point (S401); wave-sealing a main pipe in the inverter, and transmitting waves to auxiliary pipes in the inverter on the basis of a first wave-transmission timing sequence, the first wave-transmission timing sequence being a timing sequence of drive signals of the auxiliary pipes in the inverter when the current on the energy storage inductor is smaller than the current at the first current limiting point during the working process of the inverter (S402); determining the current on the energy storage inductor to be greater than or equal to the current at the second current limiting point (S601); and wave-sealing the main pipe in the inverter, and wave-sealing the auxiliary pipes in the inverter (S602).