System of power modules for a multi-level inverter of an electric vehicle
By designing a multi-level inverter system and utilizing the arrangement of multiple switches and neutral power rails, combined with heat sinks and capacitors, the problem of inverter instability due to heat was solved, resulting in more efficient and stable motor drive.
CN122159703APending Publication Date: 2026-06-05BORGWARNER INC
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BORGWARNER INC
- Filing Date
- 2025-12-02
- Publication Date
- 2026-06-05
AI Technical Summary
Technical Problem
In electric vehicles, the inverter's heat affects the switching operation of electrical equipment, leading to unstable operation, a problem that is difficult to solve effectively with existing technologies.
Method used
A multi-level inverter system, including a power module and an inverter, is adopted. By using multiple switches and a neutral power rail arrangement, combined with heat sinks and capacitors, current distribution and heat dissipation are optimized, loop inductance is reduced, and noise coupling is minimized.
Benefits of technology
It improves the operational stability and efficiency of the inverter, reduces harmonic levels and electromagnetic interference, enhances electrical performance, and is suitable for efficient driving of electric vehicles.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122159703A_ABST
Abstract
A system of power modules for a multi-level inverter for an electric vehicle. A system includes an inverter for converting DC power from a battery to AC power to drive an electric machine, where the inverter includes: a power module including: a positive DC power tab; a negative DC power tab; an AC power tab; a first neutral power tab; a second neutral power tab, where the first and second neutral power tabs are on opposite sides of the positive and negative DC power tabs; a first switch electrically connected to the positive DC power tab and the AC power tab; a second switch electrically connected to the negative DC power tab and the AC power tab; and one or more switches electrically connected to the AC power tab and one or more of the first or second neutral power tabs.
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