Inverter leg voltage

4 FAQs about [Inverter leg voltage]

Can a four-leg voltage source inverter reduce the number of IGBTs?

This paper presents a new three-phase four-leg voltage source inverter (VSI), which achieves a high cost effectiveness for mega-watt level system applications. The proposed four-leg inverter adopts the integrated topology with thyristors and insulated-gate bipolar transistors (IGBTs), which aims to reduce the number of IGBTs.

What is a four-leg inverter?

The proposed four-leg inverter adopts the integrated topology with thyristors and insulated-gate bipolar transistors (IGBTs), which aims to reduce the number of IGBTs. In order to handle the zero sequence current, a neutral leg via incorporating IGBTs is artfully integrated with the regular phase legs.

What is the circuit topology of four-leg DC/AC inverter?

Fig. 1 : Circuit topology of four-leg DC/AC inverter. neutral impedance connected to the fourth leg is Vdn. The voltage between a reference ‘o’ of the inverter and the neutral of the load is denoted by Vno. In order to prevent short-circuiting the DC source

How many switching states does a four-leg inverter have?

Normally, a four-leg inverter consists of 2 4 = 16 possible switching states, while for the new topology, the states of thyristors have to be considered beside the states of IGBTs. The relationship between phase voltage and switching states of phase a are summarized in Table 1, where the UT stands for “Upper Thyristor”.

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