A full-bridge inverter based on a unipolar switching scheme, the full-bridge inverter being configured to convert DC electric power to AC electric power, wherein the full-bridge inverter comprises a first branch and a second branch, which are electrically coupled in parallel between a first DC node and a second DC node of the full-bridge inverter configured to receive the DC electric power, the first branch comprising a first higher switch and a first lower switch in series, and the second branch comprising a second higher switch and a second lower switch in series, wherein the full-bridge inverter further comprises a filter circuit comprising a first inductor, one pin of the first inductor being electrically coupled with a first branch conductor, the first branch conductor being electrically coupled between the first higher switch and the first lower switch, and an opposite pin of the first inductor being electrically coupled with a first output node of the full-bridge inverter; a second inductor, one pin of the second inductor being electrically coupled with a second branch conductor, the second branch conductor being electrically coupled between the second higher switch and the second lower switch, and an opposite pin of the second inductor being electrically coupled with a second output node of the full-bridge inverter; a first filtering unit switch, a first filter diode, a second filter diode and a second filtering unit switch in series electrically coupled between the first branch conductor and the second branch conductor, cathodes of the first diode and the second diode being electrically coupled together; a third filter diode, whose cathode is electrically coupled with the first output node, and a fourth filter diode, whose cathode is electrically coupled with the second output node, the anodes of the third diode and the fourth diode being electrically coupled together; a third inductor electrically coupled between the cathodes of the first diode and the second diode and the anodes of the third diode and the fourth diode; and the full-bridge inverter further comprises electric path circuits (178, 184) configured to conduct an electric current between the third inductor and the first DC node in response to switching the first filtering unit switch in an electrically conducting state, and conduct an electric current between the third inductor and the second DC node in response to switching the second filtering unit switch in an electrically conducting state. a first branch and a second branch, which are electrically coupled in parallel between a first DC node and a second DC node of the full-bridge inverter configured to receive the DC electric power, the first branch comprising a first higher switch and a first lower switch in series, and the second branch comprising a second higher switch and a second lower switch in series, wherein the full-bridge inverter further comprises a filter circuit comprising a first inductor, one pin of the first inductor being electrically coupled with a first branch conductor, the first branch conductor being electrically coupled between the first higher switch and the first lower switch, and an opposite pin of the first inductor being electrically coupled with a first output node of the full-bridge inverter; a second inductor, one pin of the second inductor being electrically coupled with a second branch conductor, the second branch conductor being electrically coupled between the second higher switch and the second lower switch, and an opposite pin of the second inductor being electrically coupled with a second output node of the full-bridge inverter; a first filtering unit switch, a first filter diode, a second filter diode and a second filtering unit switch in series electrically coupled between the first branch conductor and the second branch conductor, cathodes of the first diode and the second diode being electrically coupled together; a third filter diode, whose cathode is electrically coupled with the first output node, and a fourth filter diode, whose cathode is electrically coupled with the second output node, the anodes of the third diode and the fourth diode being electrically coupled together; a third inductor electrically coupled between the cathodes of the first diode and the second diode and the anodes of the third diode and the fourth diode; and the full-bridge inverter further comprises electric path circuits (178, 184) configured to conduct an electric current between the third inductor and the first DC node in response to switching the first filtering unit switch in an electrically conducting state, and conduct an electric current between the third inductor and the second DC node in response to switching the second filtering unit switch in an electrically conducting state.