# Three-phase voltage-source inverter

Canonical URL: https://eloragrid.ai/symbols/three-phase-voltage-source-inverter
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: 3PH-VSI
Drawing use: Schematic, SLD
Reference families: Manufacturer

A three-leg bridge producing the documented three-phase output from a DC-link source.

## What it represents

A three-leg bridge producing the documented three-phase output from a DC-link source.
On a schematic, identify the DC-link rails, three switching midpoints and phase labels and trace the three-phase load/connection and driver/control circuits. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.
The stage topology does not establish whether the system is grid forming, grid following or suitable for a particular connection.
The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation.

## How to read it

- Identify the DC-link rails, three switching midpoints and phase labels.
- Trace the three-phase load/connection and driver/control circuits.

## Information to show or reference

- Label the DC-link rails, three switching midpoints and phase labels.
- Cross-reference the three-phase load/connection and driver/control circuits.
- Add the selected device or circuit documentation revision, power/reference connections and project signal convention.

## Important distinction

The stage topology does not establish whether the system is grid forming, grid following or suitable for a particular connection.

## Facts

- Common schematic mnemonic: 3PH-VSI — descriptive only; project/device documentation defines reference designations.
- Terminal / interface focus: The DC-link rails, three switching midpoints and phase labels
- Artwork scope: Original conceptual topology block; not a complete switch-level circuit.

## Public references

- [Bidirectional three-/single-phase AC/DC PFC and inverter application note](https://www.infineon.com/assets/row/public/documents/24/42/infineon-ac-dc-pfc-11-kw-high-efficiency-high-density-bidirectional-three-single-phase-inverter-applicationnotes-en.pdf) — Infineon Technologies. Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.