**4. Experimental Results**

In order to verify the effectiveness of the proposed method, a test prototype of the grid-connected inverter was conducted, as shown in Figure 6. For the AC-side, a 1 kW three-phase transformer was utilized. Both primary and secondary windings of the transformer were Y-connected, while the neutral point was not elicited, and the ratio was 10:1. Meanwhile, three inductors with 5 mH/0.7 Ω were employed as the output filter inductances. For DC-link, an adjustable dc power supply was used to emulate an EV battery and the dc/dc converter was not required consequently. The dc power supply could provide a maximum voltage of 300 V, while the tested voltage was 150 V. Moreover, the three-leg inverter consisted of three FF300R12ME4 (Infineon) modules. Two current sensors WHB25LSP3S1 were utilized to measure the output currents (*ib* and *ic*). The grid voltages (*eab* and *ebc*) and dc-link voltage were measured using three voltage sensors WHV05AS3S6. Furthermore, a TMS320F28335 digital signal processor was employed to implement the real-time control code, which was developed with C language in Code Composer Studio 6. 0. The sampling frequency was set to 10 kHz. What should be noted is that the grid voltage *ea* was exported to the oscilloscope through digital to analog (D/A) channel since the neutral point of the used transformer was not elicited. Here, a D/A chip AD5344BRU was utilized to implement the D/A function.

**Figure 6.** Experimental setup.
