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Everyone wants lighter motors. I see the hidden design compromises. Agree?
Yes, Lower weight improves efficiency, Acceleration, and vehicle dynamics. ๐๏ธ But lightweight designs often Introduce new challenges: Structural Integrity concerns Manufacturing complexity Thermal limitations Cost pressures Let's dive deeper now. ๐ฏ Copper vs weight Reducing copper lowers Mass But can increase: Current density Temperature rise Copper losses Cooling requirements ( adds cost ) ๐ Take-away: Less copper can Mean more heat. ๐ฏIron vs efficiency Reducing stator/r
Murali krishna
Aug 131 min read
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30,000 rpm motors are not future talk. They are already entering mass production.
More speed. Less material. Better efficiency. 30,000 rpm motors are not future talk. They are already entering mass production. I came across this PUMBAA update recently. It got me thinking deeply. Most EV motors peak near 6,000 rpm. Beyond that, torque starts dropping. That limits high-speed acceleration. Now imagine pushing 30,000 rpm. System design changes completely. Higher speed means smaller motor size. Less copper and magnet needed. Even core material reduces significa
Murali krishna
Apr 231 min read
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Let us learn about U/I/X/Trim cut winding and
I used to focus on magnets more than windings. Hairpin designs changed how I see motor performance. Letโs break down U/I/X/Trim cut winding. As a motor designer, I often face design trade-offs. In one case, we needed higher torque. But the motor volume could not increase. The stator slots were already full. Round wire windings limited copper utilization. Increasing current created new problems. Copper losses increased very quickly. Thermal limits appeared in simulations
Murali krishna
Apr 72 min read
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