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Equipment VFD-101 FM harmonic_bearing_current ISO 14224 mode Shaft voltage bearing current (VFD-induced) Shaft voltage bearing current (VFD-induced) Source synthetic + standards-based engineering estimate (ISO 14224 / IEC 61800 / IEEE C57 框架归类)
共模电压致电机轴承电蚀（轴电流）
VFD-101 · Variable Frequency Drive (VFD)
Related equipment → VFD-101
0.82Source conf.
—Evidence conf.
Shaft voltage bearing current (VFD-induced)ISO 14224 mode
1Failure Mechanism

Function:输出至电机，驱动负载

Failure cause:PWM 高频 dv/dt 与共模电压经杂散电容耦合在电机轴产生轴电压，击穿油膜放电

Damage mechanism：PWM 高频 dv/dt 与共模电压经定子-转子杂散电容耦合在轴形成轴电压，击穿轴承油膜放电形成电蚀麻点（fluting），损伤 MOT-101 轴承

2Source Basis (where this FM comes from)
synthetic + standards-based engineering estimate (ISO 14224 / IEC 61800 / IEEE C57 框架归类)

Source confidence 0.82: this FM is derived from the ontology KB and cross-validated by synthetic + standards-based engineering estimate (ISO 14224 / IEC 61800 / IEEE C57 框架归类).

3Evidence Chain (supporting basis)
This FM has no offline curated evidence text; it is derived from the ontology KB and cross-validated by the listed standard clauses and related accident investigations.
Governing standards (evidence)：
  • std:IEC 61800-3 — Adjustable speed electrical power drive systems — EMC requirements · 机理级工程估计，非实测；引用 governing standard 作为分类出处
  • std:IEC 60034 — Rotating electrical machines · 机理级工程估计，非实测；引用 governing standard 作为分类出处
  • std:API 541 — Form-Wound Squirrel Cage Induction Motors—500 HP and Larger · 机理级工程估计，非实测；引用 governing standard 作为分类出处
4Related Real Accidents (traceable to accident cards)
NUREG-IN-94-51NUREG-LER-2006-004-FERMI2

This FM is recorded in 2 real accident investigation(s); tap the report no. to open the corresponding accident lesson card.

5Applicable Standards & Clauses
IEC 61800-3IEC 60034API 541

No separate clause reference.

6Derived Analysis (seeded from this FM)
6/4/4FMEA Sev/Occ/Det
0.09RBI λ
0.7Monitor pdet
12 月Insp. int.

Current tasks:轴电压/轴电流监测 | 共模电抗器/屏蔽电缆 | 轴承绝缘治理

RCFA incident:共模电压致电机轴承电蚀（轴电流）：PWM 高频 dv/dt 与共模电压经杂散电容耦合在电机轴产生轴电压，击穿油膜放电，后果类型 Operational，严重度 6

7RCM Maintenance Decision (strategy landing)
PMScheduled (Proactive) Maintenance
Recommended task绝缘/电气试验 + 继电保护定值校核 + 操动机构特性测试
Suggested intervalHigh risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Decision basis机理类别=electrical
Governing standards
GB/T 14285IEC 60034IEEE C57
⚠ This decision is engineering-inferred by RCM logic from the damage mechanism / root cause / failure cause — it is not derived from measured site history. Confirm with the equipment owner and process before execution.
⚠ 本卡技术正文（功能 / 致因 / 损伤机理 / RCFA 叙事）保留中文原文——依可信 AI 红线，自由技术文本不自动机翻、不编造英文译文。UI、设备类型、FM 名、ISO 码、标准号均为英文。
FM harmonic_bearing_current · Data from OPC KB and whitelisted public sources, compiled by Reliability AI for reliability demonstration only. Evidence ref codes are internal indices, not public DOIs.