CURRENT SENSING SYSTEM FOR FULL-BRIDGE PULSE-WIDTH MODULATED INVERTER SYSTEM

摘要

According to one aspect, embodiments of the invention provide an inverter system including an input having a positive DC node and a negative DC node coupled to a DC power source to receive input DC power, an output coupled to a load to provide output AC power, a first inverter leg including a first and a second switching device, a second inverter leg including a third and a fourth switching device, the first inverter leg and the second inverter leg being adapted to convert the input DC power to the output AC power, a current sensor coupled to one of the negative and the positive DC node, and a controller assembly adapted to measure a current through the current sensor and determine an inductor current through an inductor coupled to the output, an input current, and an output current based at least on the current through the current sensor.

主权项

1. An inverter system comprising:
an input having a positive DC node and a negative DC node adapted to be coupled to a DC power source and to receive input DC power from the DC power source; an output adapted to be coupled to at least one load and to provide output AC power to the at least one load; a first inverter leg including a first switching device and a second switching device; a second inverter leg including a third switching device and a fourth switching device, the first inverter leg and the second inverter leg being coupled between the input and the output and adapted to convert the input DC power to the output AC power; a current sensor coupled to one of the negative DC node and the positive DC node; and a controller assembly adapted to measure a current through the current sensor and determine an inductor current through an inductor coupled to the output, an input current, and an output current based at least in part on the current through the current sensor.