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Motor Design Engineering Considerations - I — Lesson 1

This lesson covers various aspects of motor design and selection, including steel losses, saturation, noise, magnet selection, peak torque and power, and ingress protection. It explains how steel losses occur due to hysteresis and eddy currents, and how these losses can be minimized. The lesson also discusses the impact of saturation on motor performance and the sources of noise in motors. It provides insights into the selection of magnets based on cost, temperature stability, corrosion resistance, and magnet strength. The lesson further elaborates on the importance of peak torque and power for short durations and the need for ingress protection to withstand environmental conditions.

Video Highlights

00:17 - Introduction and steel losses
06:20 - Effect of saturation
08:40 - Discussion on noise of motor
11:33 - Explanation of dynamic balancing
16:07 - Selecting magnet materials
19:26 - Peak torque and peak power
23:00 - Ingress protection

Key Takeaways

- Steel losses in motors occur due to hysteresis and eddy currents. These losses can be minimized by using laminated steel cores.
- Saturation can significantly impact the performance of a motor, especially at higher torques.
- Noise in motors can originate from the stator (magnetic noise) or the rotor (mechanically induced noise).
- The selection of magnets for motors depends on various factors including cost, temperature stability, corrosion resistance, and magnet strength.
- Motors require peak torque and power for short durations to handle specific situations like overcoming a steep ramp or overtaking on a highway.
- Ingress protection is crucial for motors to withstand environmental conditions like dust, rain, and water jets.