My thoughts on Wireless Charging

[lgoldmoon77]

nducing a voltage by mounting the receiver literally on top of the transmitter. Yeah, there's no direct physical connection but you have to make physical contact. Wireless charging doesn't exist by definition as far as I'm concerned but that's my take on things

 

[Mike Dee]

Re: couldn't live without

nducing a voltage by mounting the receiver literally on top of the transmitter. Yeah, there's no direct physical connection but you have to make physical contact. Wireless charging doesn't exist by definition as far as I'm concerned but that's my take on things

I've been saying for a long time buy most people don't get it. Its inductive charging and it's O.K. to like it, but calling it wireless charging is just wrong and between that and the Tesla car must have Tesla spinning in his grave

 

[Axidrain]

Re: couldn't live without

Technically it's correct. There's no wired coming from the phone to the charging pad lol.

 

[Mike Dee]

Re: couldn't live without

Technically it's correct. There's no wired coming from the phone to the charging pad lol.

That's called induction

 

[Im Broken]

"nducing" has nothing to do with transmitters and receivers. The correct terms are primary and secondary windings and they do NOT need to make physical contact. The magnetic fields only need to interact. Therefore it IS 100% wireless.

 

[Mike Dee]

Re: couldn't live without

"nducing" has nothing to do with transmitters and receivers. The correct terms are primary and secondary windings and they do NOT need to make physical contact. The magnetic fields only need to interact. Therefore it IS 100% wireless.

Primary and Secondary windings are elements of a transformer.

Excerpt from wikipedia:

Inductive charging (also known as wireless charging or cordless charging) uses an electromagnetic field to transfer energy between two objects through electromagnetic induction. This is usually done with a charging station. Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device.
Induction chargers use an induction coil to create an alternating electromagnetic field from within a charging base, and a second induction coil in the portable device takes power from the electromagnetic field and converts it back into electric current to charge the battery. The two induction coils in proximity combine to form an electrical transformer.[SUP][1][/SUP][SUP][2][/SUP] Greater distances between sender and receiver coils can be achieved when the inductive charging system uses resonant inductive coupling.
Recent improvements to this resonant system include using a movable transmission coil (i.e. mounted on an elevating platform or arm) and the use of other materials for the receiver coil made of silver plated copper or sometimes aluminium to minimize weight and decrease resistance due to the skin effect.



Portable electronics and devices

• Oral-B rechargeable toothbrushes by the Braun company have used inductive charging since the early 1990s.
• At the Consumer Electronics Show (CES) in January 2007, Visteon unveiled their inductive charging system for in vehicle use that could charge only specially made cell phones to MP3 players with compatible receivers.[SUP][7][/SUP]
• April 28, 2009: An Energizer inductive charging station for the Wii remote was reported on IGN.[SUP][8][/SUP]

• At CES in January 2009, Palm, Inc. announced their new Pre smartphone would be available with an optional inductive charger accessory, the "Touchstone". The charger came with a required special backplate that became standard on the subsequent Pre Plus model announced at CES 2010. This was also featured on later Pixi, Pixi Plus, and Veer 4G smartphones. Upon launch in 2011, the ill-fated HP Touchpad tablet (after HP's acquisition of Palm Inc.) had a built in touchstone coil that doubled as an antenna for their NFC-like Touch to Share feature .[SUP][3][/SUP][SUP][9][/SUP][SUP][10][/SUP]

• March 15, 2013 Samsung launched the Samsung Galaxy S4, which supports inductive charging with an accessory back.
• July 26, 2013 Google and ASUS launched the Nexus 7 2013 Edition with integrated inductive charging.
• September 9, 2014 Apple announced Apple Watch (released on April 24, 2015), which uses wireless inductive charging.

Qi devices

• Nokia launched two smartphones (the Lumia 820 and Lumia 920) on 5 September 2012, which feature Qi inductive charging.[SUP][11][/SUP]

• Google and LG launched the Nexus 4 in October 2012 which supports inductive charging using the Qi standard.
• Motorola Mobility launched their Droid 3 and Droid 4, both optionally support the Qi standard.
• On November 21, 2012 HTC launched the Droid DNA, which also supports the Qi standard.
• October 31, 2013 Google and LG launched the Nexus 5, which supports inductive charging with Qi.
• April 14, 2014 Samsung made the Galaxy s5 that supports Qi wireless charging with either a wireless charging back or receiver.
• November 20, 2015 Microsoft launched the Lumia 950 XL and Lumia 950 which support charging with the Qi standard.
• February 22, 2016 Samsung electronic announces the new flagship S7 & S7 Edge which are using interface that is almost the same as Qi.

 

[Im Broken]

Re: couldn't live without

Primary and Secondary windings are elements of a transformer.

Excerpt from wikipedia:

Inductive charging (also known as wireless charging or cordless charging) uses an electromagnetic field to transfer energy between two objects through electromagnetic induction. This is usually done with a charging station. Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device.
Induction chargers use an induction coil to create an alternating electromagnetic field from within a charging base, and a second induction coil in the portable device takes power from the electromagnetic field and converts it back into electric current to charge the battery. The two induction coils in proximity combine to form an electrical transformer.[SUP][1][/SUP][SUP][2][/SUP] Greater distances between sender and receiver coils can be achieved when the inductive charging system uses resonant inductive coupling.
Recent improvements to this resonant system include using a movable transmission coil (i.e. mounted on an elevating platform or arm) and the use of other materials for the receiver coil made of silver plated copper or sometimes aluminium to minimize weight and decrease resistance due to the skin effect.



Portable electronics and devices

• Oral-B rechargeable toothbrushes by the Braun company have used inductive charging since the early 1990s.
• At the Consumer Electronics Show (CES) in January 2007, Visteon unveiled their inductive charging system for in vehicle use that could charge only specially made cell phones to MP3 players with compatible receivers.[SUP][7][/SUP]
• April 28, 2009: An Energizer inductive charging station for the Wii remote was reported on IGN.[SUP][8][/SUP]

• At CES in January 2009, Palm, Inc. announced their new Pre smartphone would be available with an optional inductive charger accessory, the "Touchstone". The charger came with a required special backplate that became standard on the subsequent Pre Plus model announced at CES 2010. This was also featured on later Pixi, Pixi Plus, and Veer 4G smartphones. Upon launch in 2011, the ill-fated HP Touchpad tablet (after HP's acquisition of Palm Inc.) had a built in touchstone coil that doubled as an antenna for their NFC-like Touch to Share feature .[SUP][3][/SUP][SUP][9][/SUP][SUP][10][/SUP]

• March 15, 2013 Samsung launched the Samsung Galaxy S4, which supports inductive charging with an accessory back.
• July 26, 2013 Google and ASUS launched the Nexus 7 2013 Edition with integrated inductive charging.
• September 9, 2014 Apple announced Apple Watch (released on April 24, 2015), which uses wireless inductive charging.

Qi devices

• Nokia launched two smartphones (the Lumia 820 and Lumia 920) on 5 September 2012, which feature Qi inductive charging.[SUP][11][/SUP]

• Google and LG launched the Nexus 4 in October 2012 which supports inductive charging using the Qi standard.
• Motorola Mobility launched their Droid 3 and Droid 4, both optionally support the Qi standard.
• On November 21, 2012 HTC launched the Droid DNA, which also supports the Qi standard.
• October 31, 2013 Google and LG launched the Nexus 5, which supports inductive charging with Qi.
• April 14, 2014 Samsung made the Galaxy s5 that supports Qi wireless charging with either a wireless charging back or receiver.
• November 20, 2015 Microsoft launched the Lumia 950 XL and Lumia 950 which support charging with the Qi standard.
• February 22, 2016 Samsung electronic announces the new flagship S7 & S7 Edge which are using interface that is almost the same as Qi.

Exactly.

 

[Im Broken]

Re: couldn't live without

Primary and Secondary windings are elements of a transformer.

Excerpt from wikipedia:

Inductive charging (also known as wireless charging or cordless charging) uses an electromagnetic field to transfer energy between two objects through electromagnetic induction. This is usually done with a charging station. Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device.
Induction chargers use an induction coil to create an alternating electromagnetic field from within a charging base, and a second induction coil in the portable device takes power from the electromagnetic field and converts it back into electric current to charge the battery. The two induction coils in proximity combine to form an electrical transformer.[SUP][1][/SUP][SUP][2][/SUP] Greater distances between sender and receiver coils can be achieved when the inductive charging system uses resonant inductive coupling.
Recent improvements to this resonant system include using a movable transmission coil (i.e. mounted on an elevating platform or arm) and the use of other materials for the receiver coil made of silver plated copper or sometimes aluminium to minimize weight and decrease resistance due to the skin effect.



Portable electronics and devices

• Oral-B rechargeable toothbrushes by the Braun company have used inductive charging since the early 1990s.
• At the Consumer Electronics Show (CES) in January 2007, Visteon unveiled their inductive charging system for in vehicle use that could charge only specially made cell phones to MP3 players with compatible receivers.[SUP][7][/SUP]
• April 28, 2009: An Energizer inductive charging station for the Wii remote was reported on IGN.[SUP][8][/SUP]

• At CES in January 2009, Palm, Inc. announced their new Pre smartphone would be available with an optional inductive charger accessory, the "Touchstone". The charger came with a required special backplate that became standard on the subsequent Pre Plus model announced at CES 2010. This was also featured on later Pixi, Pixi Plus, and Veer 4G smartphones. Upon launch in 2011, the ill-fated HP Touchpad tablet (after HP's acquisition of Palm Inc.) had a built in touchstone coil that doubled as an antenna for their NFC-like Touch to Share feature .[SUP][3][/SUP][SUP][9][/SUP][SUP][10][/SUP]

• March 15, 2013 Samsung launched the Samsung Galaxy S4, which supports inductive charging with an accessory back.
• July 26, 2013 Google and ASUS launched the Nexus 7 2013 Edition with integrated inductive charging.
• September 9, 2014 Apple announced Apple Watch (released on April 24, 2015), which uses wireless inductive charging.

Qi devices

• Nokia launched two smartphones (the Lumia 820 and Lumia 920) on 5 September 2012, which feature Qi inductive charging.[SUP][11][/SUP]

• Google and LG launched the Nexus 4 in October 2012 which supports inductive charging using the Qi standard.
• Motorola Mobility launched their Droid 3 and Droid 4, both optionally support the Qi standard.
• On November 21, 2012 HTC launched the Droid DNA, which also supports the Qi standard.
• October 31, 2013 Google and LG launched the Nexus 5, which supports inductive charging with Qi.
• April 14, 2014 Samsung made the Galaxy s5 that supports Qi wireless charging with either a wireless charging back or receiver.
• November 20, 2015 Microsoft launched the Lumia 950 XL and Lumia 950 which support charging with the Qi standard.
• February 22, 2016 Samsung electronic announces the new flagship S7 & S7 Edge which are using interface that is almost the same as Qi.

So you agree with me or the OP?

 

[Mike Dee]

Re: couldn't live without

I'm saying its inductive charging which it is by definition. The term wireless charging has become synonymous with inductive charging in portable electronics industry because it sounds sexier. It is somewhat misleading because in the electric utility industry that definition would never fly.

 

[bobdob]

Re: couldn't live without

We are getting a little unnecessarily deep in semantics here...

What is going on in inductive/wireless charging is exactly what goes on in a transformer. I'm not sure whether having the coils not be mechanically linked makes it "not a transformer". But does it even matter? The schematic symbol for a transformer doesn't hint at any mechanical coupling

 

[Mike Dee]

Re: couldn't live without

We are getting a little unnecessarily deep in semantics here...

What is going on in inductive/wireless charging is exactly what goes on in a transformer. I'm not sure whether having the coils not be mechanically linked makes it "not a transformer". But does it even matter? The schematic symbol for a transformer doesn't hint at any mechanical coupling

I didn't initiate the transformer into the conversation and a transformer serves a different purpose. The turns ratio or the primary and secondary steps a voltage up or down.

 

[bobdob]

Re: couldn't live without

I didn't initiate the transformer into the conversation and a transformer serves a different purpose. The turns ratio or the primary and secondary steps a voltage up or down.

A transformer can have a 1:1 turns ratio and not change the voltage at all - that is done all the time, the purpose being solely for isolation.

 

[Mike Dee]

Re: couldn't live without

A transformer can have a 1:1 turns ratio and not change the voltage at all - that is done all the time, the purpose being solely for isolation.

You are correct and there are many other types of transformers. I was trying to use the most common example to keep it simple.

Though the transmitter and receiver of a wireless charging device effectively act like a transformer I wouldn't normally call it such because it is two separate units and that is what I was trying to convey in response to post 5. I seem to have failed in that respect.

I believe the OP was trying to convey that wireless charging is really inductive charging which it is and I interjected that wireless charging has become the synonymous term for inductive charging. Some people argue that it should not be called wireless charging and would like to reserve that term for being able to wirelessly charge from a distance. Anyway I'll leave it at that.

 

[Im Broken]

Ahhhh. I get it now. Trying to compare wireless charging to wireless internet or wifi. That thought never crossed my mind since it's not practical at all. That would be pretty sweet though. I guess you could say solar is wireless charging from a distance

 

[Mike Dee]

Ahhhh. I get it now. Trying to compare wireless charging to wireless internet or wifi. That thought never crossed my mind since it's not practical at all. That would be pretty sweet though. I guess you could say solar is wireless charging from a distance

That's what Tesla had in mind....transmit electricity wirelessly. Question is.... How to do it safely.
Solar is energy conversion but you could look at it as wireless charging.
Lol

 

[Im Broken]

That's what Tesla had in mind....transmit electricity wirelessly. Question is.... How to do it safely.
Solar is energy conversion but you could look at it as wireless charging.
Lol

Tesla was a genius but that whole wireless transmission thing is way out there.

I could argue almost all the energy we consume today can be traced back to solar. Not counting nuclear or geothermal. Name an energy source and I'll tell you how bombardment by photons created it.

 

[Mike Dee]

Tesla was a genius but that whole wireless transmission thing is way out there.

I could argue almost all the energy we consume today can be traced back to solar. Not counting nuclear or geothermal. Name an energy source and I'll tell you how bombardment by photons created it.

Oh...no....I'm not going there

 

[Im Broken]

Oh...no....I'm not going there

lol

The sun is so dense it takes hundreds of thousands of years for a photon to escape it's core. I love talking particles.

 

[Mike Dee]

lol

The sun is so dense it takes hundreds of thousands of years for a photon to escape it's core. I love talking particles.

Have you been hanging around with Brian May?

 

[Im Broken]

Have you been hanging around with Brian May?

Brian Greene and Brian Cox. Love me some particle physics. Brian May is pretty badass too though.