关键词: 多合一电驱动系统, 高压电腐蚀, 扁线电机, SiC 电控, 行星减速器, 多场耦合, 技术挑战

Abstract: As the core power hub of new energy passenger vehicles, the electric drive system is accelerating its evolution towards ultra-high frequency and high voltage, extreme integration, and high power density. From the academic perspective of electromagnetic-thermal-mechanical multi-physics coupling and system-level integration innovation,this paper systematically reviews the technical evolution context and engineering application status of new energy passenger vehicles
from four dimensions: multi-domain integrated drive assembly,high-performance drive motor,wide bandgap semiconductor controller,and precision transmission mechanism. Aiming at the underlying physical bottlenecks,engineering implementation difficulties, cross-domain collaborative design faults, and full life-cycle reliability blind spots exposed in current technological exploration,this paper deeply analyzes the common core challenges faced by the industry in the process of moving towards ultra-high speed, high voltage, and high integration. It aims to provide rigorous theoretical references for breaking through the technical bottlenecks of new energy vehicle electric drive systems.

Key words: multi-in-one electric drive system, high-voltage electro-corrosion, flat wire motor, sic controller, planetary gear reducer, multi-physics coupling, technical challenges