Copy of Wireless Energy Transfer_pp_draft3_2007a

8/14/2019 Copy of Wireless Energy Transfer_pp_draft3_2007a

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Wireless Energy Transfer

Team Cheetah

Igal Mohamed, Mike Sweeney, Nguyen

Than


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Project Overview

Sponsored by EECS Department

Prove that wireless energy transfer ispossible

Power a light bulb wirelessly bymagnetic induction

I


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Team Cheetah

Small size of the group

Each member involved in every

section of the project

N


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Presentation Outline

Marketing

Quality

Engineering

Manufacturing


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Marketing

The Wireless Energy System


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Marketing analysis

Portable mobile devices needcharging.

People are tired of dying batteries

Current wireless charging is onlypossible

within inches from a transmitter

I


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Marketing Features:

Wireless technology will expand currentelectronics market

Wireless

Convenient Portable

M


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M,I

Wireless Energy System Specifications

Safety Operates at 10Mhz

Affordable Cost $ 35-50Long Lasting Operation 1-2 Hours between charges

Long Distance Transfer Full efficiently at one meter

Extended life 3-5 years

Accessibility Available at commonelectronic stores.


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Market Competition

WildCharger & Visteon

$50-100

Charging Multiple Device

Must have contact on pad

N


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Quality EngineeringWireless Energy System


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Quality Testing

Conformance to requirements

Tests to verify Performance

Temperature

Impact

Humid

I

T T i


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Temperature TestingProcedure:

Determine if temperature affectsthe power transfer

Same procedure will be

implemented for hot and cold

temperatures

M


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Humidity Testing Procedure:

How much humiditycan the system be

exposed to

Without inhibiting

losses in energytransfer ?

N


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Impact Testing Procedure:

The impact test will check the casethat surrounds the wirelesstransmitter for defects.

I

Wi l S t Q lit


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Wireless System QualityTesting

The transmitter and the receiver willbe tested separately

M

Testing Equipment

Ref Heater Hum Therm Hygro Mult Mstic Tank

Temp Test R R R R

Humid Test R R R R R R

Impact Test R R

Ref = Refrigerator; Hum = humidifier; Therm = thermometer;Hygro= Hygrometer; Mult = Digital Multimeter; Mstic = Meter Stick


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Reliability

Guarantee of system to perform forthe specified time

To predict the rate of failure of thesystem

Using the (MIL-HDBK-217F).

I


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Failure Rate calculation

Total rate failure is:

componentsofnumbercomponentindividualofratefailure

)(where

p

p*1

21

=

=

=

+=

p

P

N

Nsum

M


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Sub-system rate of failure per10^6 hours

Transmitter~

1.5

Receiver~

1.5

Components Rate of failure per 10^6 hours

Resistors (~20) 0.0043

Inductors 0.008

Transistors 0.0023

Capacitors 0.0039

Diodes 0.0069

The rate in which the wireless energydevice will fail is 3 times every million

hours of use

or1 failure per 500,000 hours of use.

N

Failure Rate CalculationTable 1 Table 2


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Certification Required

FCC Regulation

Is it safe when exposed to magneticfield?

I


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Engineering

Wireless Energy

System


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Engineering Specificationsand Principles

Magnetic Induction

Short distance magneticresonances

I,N

Transmitter Copper Coil

Input Voltage 120 V (AC), 60 HzTransmission

signal 10 MHz

Receiver Copper coil

Output 1 watt


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Wireless Energy ChargerSystem

M,N


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AC to DC converter

This converter will convert the 120 VAC from the power outlet to a 9 V DCvoltage across the input of thefrequency oscillator.

Rectifier circuit composed a diodes and acapacitor.

M


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Frequency oscillator

Input voltage is 9 V D.C

Outputs A.C current at the desiredfrequency.

Creates an electromagnetic energy.

I


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Principle of Primary Coil

ProjectingMagneticField

HudBd =

Magnetic Vector Equation


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Principle of Receiving Coil

The Changing in

Flux createsan induced emf

= sdBNVemfdt

d

Induced Voltage


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Safety

Two Classes of

Radiation

I


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Can cause current in the

body

Can cause ionization ofmolecules

Can alter DNA

Ionizing radiation ( > 10^15 Hz )

Safety

N


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Non-ionizing radiations (

Documents

Copy of Wireless Energy Transfer_pp_draft3_2007a