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Explore Why Does a Piece of Steel Turn? | SynRM Explained in 3D with 169 views, 1 likes, and 0 comments. Experience the impact of this video content that has captured audience attention.

The rotor of a synchronous reluctance motor (SynRM) is nothing but a stack of steel laminations with air slots cut into it: no magnets, no winding, no cage and no brushes. Yet it turns exactly in step with a rotating magnetic field. In this 3D animation we find out why a piece of steel turns, and what it takes to run it. We take the motor apart, then watch it work with live 3D, 2-D magnetic-field, torque, phasor and speed diagrams. At the end we compare it with the switched reluctance motor (SRM). You will see: • Where synchronous reluctance motors are used: pumps, fans and compressors, HVAC, machine tools, conveyors, electric vehicles • What is inside: frame and end shields, stator core and winding (the same as in an induction motor), the steel rotor with its flux barriers, shaft and bearings • The physics: the flux travels easily along the steel (d axis) and badly across the air slots (q axis), so Ld is about 6 times Lq, and the rotor lines up with the rotating field. A zoomed, slow-motion view shows the flux lines inside the rotor steel • Load: the rotor lags the field by the load angle δ, torque follows sin 2δ, rated load is at δ of about 18° and the maximum is at 45° (about 167% of rated torque) • What happens if the load is too high: the rotor falls out of step • Starting: why the motor cannot start by connecting it straight to the supply, and how a converter ramps up the field frequency • Current and power factor: the d current magnetises, the q current makes torque, and the power factor is about 0.7 at rated load • SynRM against SRM, side by side: stator, rotor, currents, torque ripple, and the converter each one needs (standard inverter against a half-bridge per phase) • Pros and cons CHAPTERS 0:00 The AC motor that is just steel 0:21 Where synchronous reluctance motors are used 0:42 What is inside: parts of the motor 0:56 Part-by-part tour in 3D 1:55 Physics: why does a piece of steel turn? 3:32 Load: load angle and torque 4:17 Starting: how does it start? 5:05 Current and power factor 5:44 Comparison: SynRM vs switched reluctance motor 7:25 Pros and cons 7:56 Recap 8:38 Which motor next?

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