| 摘要 |
A half-bridge inverter unit and an inverter. The half-bridge inverter unit comprises an inverter control module and an inductor (L1), wherein the inverter control module can provide different connection states in response to different operation modes, thereby enabling a corresponding half-bridge inverter unit to operate in a buck mode or a boost mode, so as to satisfy the requirements of a wide input voltage range. By means of the characteristic of the positive and negative half-cycle symmetry of a grid voltage, the problem of neutral-point voltage balance of two series capacitors in parallel connection with a direct-current power source is solved. The half-bridge inverter unit adopts a single-stage structure, and has a low power consumption, low costs, high efficiency and high stability. |
