Power converter and system for engine starter generator

By designing a power converter system including AC-DC and DC-DC converters, the self-starting problem of the asynchronous induction generator during electrical load fault is solved, and the cooling efficiency is improved and the cooling system is simplified through a one-way oil flow cooling system.

CN120729079APending Publication Date: 2025-09-30GENERAL ELECTRIC CO
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Patent Information

Application Number
CN202510378180.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-03-29
Filing Date
2025-03-28
Publication Date
2025-09-30

AI Technical Summary

Technical Problem

In the prior art, asynchronous induction generators cannot maintain the excitation voltage when the electrical load fails, resulting in an inability to self-start, and traditional cooling systems are complex and inefficient.

Method used

A power converter system is designed, including an inverter/converter/controller (ICC) containing AC-DC and DC-DC converters, combined with semiconductor switching devices, inductors, and controller modules. It is capable of maintaining the excitation voltage during electrical load faults and improving efficiency through a single-pass oil flow cooling system.

Benefits of technology

The invention realizes maintaining the excitation voltage of the induction generator in the case of electrical load failure, simplifies the cooling system, and improves the starting capability and cooling efficiency of the generator.

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Abstract

The invention relates to a power converter and a system for an engine starter generator. A power converter system includes an asynchronous induction generator electrically coupled to an inverter / converter / controller (ICC). The ICC may be coupled to an electrical load. The ICC may include an AC-DC converter and a DC-DC converter. The DC-DC converter is configured to operate at a duty cycle substantially equal to 1 in a first mode of operation. In the event of a short-circuit fault in the electrical load, the DC-DC converter is configured to operate at a duty cycle of less than 1 in the second mode of operation.
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