Abstract: This application discloses an inverter circuit for an inverter such as a photovoltaic inverter. Also disclosed are inverters and photovoltaic power systems including such inverter circuits. The inverter circuit is based on a HERIC topology, and in the inverter circuit a third capacitor and a fourth capacitor are bridge-connected between a bus and a first longitudinal bridge and between the bus and a second longitudinal bridge respectively. In this way, when the inverter circuit goes from a starting phase to a freewheeling phase, the third capacitor and the fourth capacitor can stabilize a voltage fluctuation caused by different turn-off speeds of the switching transistors in the HERIC topology, to prevent resonance caused by the voltage fluctuations.

Abstract: The present invention is applicable to the communication equipment field, and in particular, relates to temperature control equipment and a communication equipment cabinet. In the embodiments of the present invention, the temperature control equipment uses an inverter to perform regulated filtering for an alternating current and uses a DC/DC boosting module to boost a direct current, thereby supplying power to the compressor of the temperature control equipment. When the temperature control equipment is powered up by the alternating current power supply and the direct current power supply, the power supply changes from an alternating current to a direct current once the alternating current fails, thereby reducing a fault rate and improving reliability.