Failure Mode and Effect Analyses

Failure Mode and Effect Analyses (FMEA) / Failure Mode, Effect and Criticality Analyses (FMECA)

Definitions:

FMEA/FMECA is a systematic method of analyzing a product design or system to attain the following objectives:

  1. To identify single point failure modes within the product design or system that would cause safety-critical effects and undermine operational safety.
  2. To provide risk mitigation recommendations for such identified safety-critical failure modes.

FMEAs and FMECAs are performed at the component and functional levels.
Component level FMEAs and FMECAs are fastidious, comprehensive and highly desirable.

Pertinent to FMECA:

Failure modes and effect descriptions are categorized into hazard severity classifications.

Hazard Severity Classifications includes the following: Catastrophic, Hazardous (or Critical), Major, Minor and No Effect.

Hazard Severity Classifications are considered System Safety Assessment elements.

FMEA/FMECA Process Flow

FEMA Flowchart

Electric Machine Solutions

- AC Machines -

squirrel cage induction motor

Wound Rotor

motor showing rotor and stator windings

Squirrel-Cage Rotor

Induction Motors

Electric Machine Solutions

Cylindrical-Pole Rotor

Mechanical motor components

Salient-Pole Rotor

Synchronous Motors

- DC Machines -

Precision servo motor

Brushless DC Motors

Electric motor
Silver metal DC gear motor

Permanent Magnet DC Motors

- Winding Configurations -

Outer rotating ring
inner rotor motor
brushless DC motor
rotating electric motor

- Finite Element Analyses -

spiral motor winding
Spiral coil winding pattern
Motor cross-section
Engineering analysis of motor design