How Things Work - Pennsylvania State University

Wireless Charging Technology
Junhui Zhu
Shiyu Zhang
Fengchun Yang
Reference 1
* There are a lot of similar
products using wireless
charging technology.
* Especially, in the
Thanksgiving Holiday, you
probably see a lot of this
products on the shelf.
* But How Does It Works?
Reference 2
* From our recent lecture, we have
learned Electronic Induction
* Theses Products applied Electronic
Induction Concept into real world.
* This concept is very similar to our
lecture’s (10C) Electronic
* Input alternating currents generate
Magnetic Filed.
* The Magnetic Filed is also constantly
alternating, because the origin
current is alternating (AC)
* The alternating in Magnetic Filed in
Output coil generate current, with
the same AC frequency, but different
Reference 5
* The difference of this model than we have learned in the
class is the distance between two coils.
* In the Transformer Model, two coils are very close to each
* The Wireless Charge, charge station and charge devices have
greater distance than transformer model. BUT, the concept is
the same.
1. The concept is that Charging Coil generates Electronic
Magnetic Wave.
2. The Electronic Magnetic Wave is like a radio broadcasting
station and is broadcasted in to the air
3. The Device Coil receives the Electronic Magnetic Wave in
some distance.
4. The Electronic Magnetic Wave in the Device Coil is
constant alternating with the same frequency as it was
5. Because the Electronic Magnetic Wave is constantly
alternating in the Device Coil, the current starts to form
in the Device Coil.
6. The Device Coil has received the power from the Charging
7. When the Device Coil has enough current and voltage to
charge the battery, your device is being charged!
Reference 4
* In addition to the simple concept, the Wireless
Charging Station is a little more complicated,
because the distance between two coils.
* The Wireless Charging Technology requires
stronger magnetic field and specific wireless
radio frequency to transmit longer distance,
and not interrupt other devices.
* To maximize power output, the transmitting
frequency must be able to resonate between
two coils to have more efficiency.
Reference 3
Reference 3
* Below is a Youtube Video demonstrates Wireless Charging
* Higher Power and able to
charge your electronic car
* Longer distance and able to
charge all you electronic
devices at home.
Reference 6
* You cell phone can be
wireless charged anywhere
like receiving cell phone
Reference 7
Lecture 10C

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