Research interview questions - advice on Wireless Charging

mainline said:

Power transmission over long distance already exists and has for years.

Toyota had inductive electric car charging in 2011.

Power mat phone/laptop charging has been around for years.

Japans bullet train used induction.

But as already said bigger the distance bigger the losses.

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mainline said:

Power transmission over long distance already exists and has for years.

Toyota had inductive electric car charging in 2011.

Power mat phone/laptop charging has been around for years.

Japans bullet train used induction.

But as already said bigger the distance bigger the losses.

Click to expand...

narkedatninety said:

Inductive relies on very short distances. Maybe you were thinking of resonant?

e.g Inductive Versus Resonant Wireless Charging: A Truce May Be a Designer’s Best Choice - https://www.digikey.co.uk/en/articles/inductive-versus-resonant-wireless-charging

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mainline said:

The technique is still “inductive” in that the oscillating magnetic field generated by the primary coil induces a current in the secondary

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An Efficiency Enhancement Technique for a Wireless Power Transmission System Based on a Multiple Coil Switching Technique

For magnetic-coupled resonator wireless power transmission (WPT) systems, higher power transfer efficiency can be achieved over a greater range in comparison to inductive-coupled WPT systems. However, as the distance between the two near-field resonators varies, the coupling between them...

www.mdpi.com

narkedatninety said:

You said "power transmission over long distance already exists and has for years", then stated several examples of very short range inductive methods.

Long range WPT methods specifically utilise LASER, microwave, resonant-magnetism for e.g satellite applications.

An Efficiency Enhancement Technique for a Wireless Power Transmission System Based on a Multiple Coil Switching Technique

For magnetic-coupled resonator wireless power transmission (WPT) systems, higher power transfer efficiency can be achieved over a greater range in comparison to inductive-coupled WPT systems. However, as the distance between the two near-field resonators varies, the coupling between them...

www.mdpi.com

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mainline said:

I don't really know what you're getting at, power transmission over long distance HAS been around for a long time.

You then go on to quote Long range WPT methods.

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narkedatninety said:

The question was regarding a short-range scenario. WPT over long distance isn't very useful because they tend to use radiative/resonant technologies e.g power-beam/LRLPs . Since you then went on to list some short-range tech (i.e inductive coupling rather than far-field methods, magnetic resonant coupling, for example) underneath 'long distance', I thought it could possibly become confusing for OP.

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DPG said:

OP hasn't been on here for 2 months so I wouldn't worry too much.

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