Power converter, in particular for aircraft, and associated method

By using wide bandgap auxiliary switches made of silicon carbide or gallium nitride in aircraft electrical power converters, the problem of heat loss and large volume of silicon switch power components is solved, smaller volume and lower heat loss is achieved, and the system continuity and reliability are ensured.

CN119654788APending Publication Date: 2025-03-18SAFRAN AEROSYST
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Patent Information

Application Number
CN202380057516.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-08-05
Filing Date
2023-08-01
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

In existing aircraft electrical power converters, switching power components made of silicon have significant heat loss and large volume problems, resulting in increased power consumption and shortened service life.

Method used

A wide bandgap auxiliary switch made of silicon carbide (SiC) or gallium nitride (GaN) is integrated into the electric power converter, and the fault switch is detected through the monitoring module to detect the fault or drift of the auxiliary switch, and the fault switch is disabled to ensure system continuity.

Benefits of technology

Reduces the volume of the power converter, reduces heat loss, and ensures system continuity and reliability in the event of auxiliary switch failure.

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Abstract

The invention relates to an electric power converter (2) for supplying an electric load (3), in particular of an aircraft (1), comprising:-a supply module (5); -at least one main switching arm (18, 19, 20) comprising a first main switch (21) and a second main switch (22); -at least one intermediate connection (29, 30, 31) arranged between the first main switch (21) and the second main switch (22) and intended to be connected to a phase (35, 36, 37) of the electrical load (3); -an auxiliary circuit (7) comprising at least one control line (41, 42, 43) comprising at least one switching unit (44, 45, 46). The switching unit (44, 45, 46) comprises at least one auxiliary switch (62), in particular an auxiliary switch (62) made of silicon carbide or gallium nitride.
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