EV Electric Motors

1. Inefficient motor matching for diverse speed rangesAdvanced Motor Architecture28 documents (7%)
2. Winding overheating from high power density requirementsThermal & NVH Management18 documents (5%)
3. Specialized traction requirements for non passenger vehiclesAdvanced Motor Architecture17 documents (5%)
4. Limited vehicle range from low battery energy densityAdvanced Motor Architecture16 documents (4%)
5. High frequency gear whine without engine masking noiseThermal & NVH Management12 documents (3%)
6. Traction motor acoustic radiation from electromagnetic PWM excitationThermal & NVH Management12 documents (3%)
7. Inverter thermal inefficiency limiting power densityControl Logic & Digital Validation11 documents (3%)
8. Drive bearing degradation causing unexpected system failureControl Logic & Digital Validation11 documents (3%)
9. Regional adoption rate variabilityMarket Dynamics & Fleet Conversion11 documents (3%)
10. Manufacturing scrap rates during end of line testingControl Logic & Digital Validation10 documents (3%)
11. Lack of standardized test rig capability dataControl Logic & Digital Validation10 documents (3%)
12. Low slot fill factor in stranded wire windingsAdvanced Motor Architecture10 documents (3%)
13. Gear transmission dynamic instability during electromagnetic excitationThermal & NVH Management10 documents (3%)
14. Rare earth magnet supply chain bottlenecksMaterial & Supply Chain Sustainability9 documents (2%)
15. Rare earth material scarcity in permanent magnetsControl Logic & Digital Validation8 documents (2%)

Largest 15 of 58 problems