INVERTING APPARATUS

摘要

An inverting apparatus including an inverting circuit and a control circuit is provided. The inverting circuit has a first bridge arm unit, a second bridge arm unit, and an energy charging/discharging unit. The energy charging-discharging unit is coupled between the first bridge and the second bridge arm units. The first bridge ail 1 unit is switched according to a first and a second control signals and the second bridge arm unit is switched according to a third and a fourth control signals, so as to converts a DC input voltage into an AC output voltage. The control circuit controls the power conversion of the inverting circuit by the control signals. The control circuit samples magnetizing currents flow through the first and the second bridge arm units so as to adjust switch timing of the control signals, and thus the inverting circuit is operated at the boundary conduction mode (BCM).

主权项

1. An inverting apparatus, comprising:
an inverting circuit, having a first bridge arm unit, a second bridge arm unit and an energy charging/discharging unit, the energy charging/discharging unit is coupled between the first bridge arm unit and the second bridge arm unit, and the energy charging/discharging unit is adapted to connect an electrical grid in parallel, so as to provide an AC output voltage, wherein the first bridge arm unit and the second bridge arm unit receive a DC input voltage, the first bridge arm unit is switched according to a first control signal and a second control signal, and the second bridge arm unit is switched according to a third control signal and a fourth control signal, so as to convert the DC input voltage into the AC output voltage; and a control circuit, coupled to the inverting circuit and configured to provide the first through the fourth control signals to control power conversion of the inverting circuit, wherein the control circuit samples a first magnetizing current flowing through the first bridge arm unit and a second magnetizing current flowing through the second bridge arm unit to adjust switch timing of the first through the fourth control signals, such that the inverting circuit is operated on a boundary conduction mode (BCM).