Inverter adopting electromagnetic compatibility design
By introducing electromagnetic compatibility (EMC) design into the inverter, including multiple filtering modules and isolation measures, the problem of strong electromagnetic interference in the inverter was solved, achieving improved EMC and reduced costs.
Patent Information
- Application Number
- CN202520952078.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2026-04-17
- Estimated Expiration
- 2035-05-14
AI Technical Summary
The lack of effective electromagnetic compatibility solutions in existing inverter designs leads to strong electromagnetic interference and increases the cost of subsequent EMC correction.
The inverter, designed with electromagnetic compatibility in mind, includes input and output electromagnetic interference filtering modules, a common-mode inductor, an inverter unit, an AC inductor-capacitor-inductor filtering module, a phase-shifting isolation three-phase transformer, and a control module. It suppresses common-mode noise through symmetrically wound dual coils, incorporates an AC LCL filter, and adds an input-side electromagnetic interference filtering module to ensure that signals are not interfered with during input and output. It uses fiber optic connections between the inverter unit and the control module, and separates the high-voltage and low-voltage sections. It also employs EMI filters and shielding design.
It effectively suppresses electromagnetic interference in the inverter, improves electromagnetic compatibility, reduces output voltage and current ripple, ensures signal continuity during input and output processes, and reduces the cost of EMC correction.