4.1.2.3.2 Build Level 2—Close Current Loop

In Build 1, the open loop operation of the inverter is verified. In this build, Build 2, the inner current loop is closed. For example, the inductor current is controlled using a current compensator G_i. Both DC bus and output voltage feed forward are applied to the output of this current compensator to generate the duty cycle of the inverter, as shown in Equation 12. The plant for the current compensator is simple to use, and a proportional integral (PI) controller may be used to tune the loop of the inner current.

Figure 26 shows the build level 2 control diagram of the closed current loop.