ZVT zero voltage conversion inverter

How to reduce converter loss in split phase HB inverter?

A soft switching circuit implementing zero voltage transition (ZVT) is proposed for the boost stage, while a coupled inductor integrated magnetics is incorporated in the split phase HB inverter stage to reduce converter loss.

What is auxiliary ZVT circuit?

The auxiliary ZVT circuit in the boost stage enables the switching node current to flow through an auxiliary inductor and a transistor placed across the main inductor during complementary device turn OFF, thus ensuring zero voltage turn ON of the main switch. This modification does not interfere with the basic converter or controller performance.

What is a split phase inverter?

The former is composed of an inductor , dc-link capacitor , input capacitor , and switches and . The split phase inverter stage comprised four switches , , , and , two for each phase and coupled inductors and as shown in Fig. 1a. The boost stage controls the dc-link voltage to be around twice the input voltage which represents the PV panel voltage.

What is a 1 kVA CGdL inverter?

A 1 kVA GaN-based CGDL inverter prototype has been developed, as shown in Fig. 6a and its component details are given in Table 3. GS66516B top-cooled E-mode GaN devices from GaN systems are used for the main switches, while SiC devices are used for the ZVT branch.

Do PV inverters have a common ground structure?

In general, all PV inverters with a common ground structure (PV panel negative connected to the grid neutral) can realise negligible leakage current since the panel negative terminal being directly shorted to the grid neutral and hence to the ground ideally eliminates the common mode parasitic capacitance.

What is the basic topology of a split phase AC converter?

The basic topology reported with preliminary results in is a modification of the split phase dc–ac converter proposed in where the decoupling capacitor is removed from the lower HB link to the main dc-link .