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The Future Energy Challenge Energy Challenge in the Home

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The Future Energy Challenge Energy Challenge in the Home Single-Phase Powered Induction Machine Drive for Residential Applications iDRIVE iDRIVE – PowerPoint PPT presentation

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Title: The Future Energy Challenge Energy Challenge in the Home


1
The Future Energy Challenge Energy Challenge in
the Home
Single-Phase Powered Induction Machine Drive for
Residential Applications
April 29, 2004 Power Affiliates
Program Presented by Brett Nee Jonathan
Kimball
  • Sponsored by
  • Grainger Center for Electric Machinery and
    Electromechanics
  • National Science Foundation
  • California Energy Commission
  • In kind support from
  • Emerson Motor Company

2
Overview
  • Future Energy Challenges Motivation
  • Design Specifications
  • UIUCs solution the iDRIVE
  • Competition Results
  • 2005 Future Energy Challenge

3
Motivation
  • Motors account for approximately 64 of the U.S.
    electrical use
  • Approximately 1 billion motors in the U.S. use
    over 1700 billion kWh/yr
  • 90 of the motors are less than 1 hp in size, and
    account for approximately 10 of the electricity
    consumed by the motor population
  • This translates to 170 billion kWh/yr

4
Motivation
  • Each 1 improvement in motor and drive efficiency
    results in
  • 1.7 billion kWh/yr of energy saved
  • An equivalent of 6 10 million tons of displaced
    coal/yr
  • 15 20 million tons less CO2 released into
    atmosphere/year
  • Over 1 billion energy cost saved/yr

5
2003 FEC Requirements
  • Create a Motor and Drive System
  • Motor System Specifications
  • Output power range 50W - 500W (lt1HP)
  • Motor Speed ranges from 150RPM - 5000RPM
  • Efficiency gt 70
  • Power Factor gt 0.8
  • Operate from a single phase 120 Vac source

6
The iDRIVE
PFC Boost Rectifier Hex-bridge Inverter
Induction Motor
7
iDRIVE PFC Boost
  • Specifications
  • 200 V dc bus with /- 10 V ripple
  • gt95 Efficiency
  • Power Factor1
  • Output Power 80W - 800W

8
iDRIVE - Inverter
  • Characteristics
  • dc to ac conversion (three-phase)
  • Transfers power from PFC stage to the induction
    motor
  • gt95 Efficiency
  • Volts per Hertz motor control strategy using
    Harmonic Elimination

9
Hamonic Elimination
3rd 13th harmonics eliminated
10
iDRIVE Induction Motor
  • Why a new design?
  • Low efficiency of standard machines.
  • Machines are not designed specifically for high
    efficiency with drives.
  • Need a different approach to meet the
    specifications.
  • Different performance criteria can be applied
  • No line-starts.
  • Motors operate only in low slip regime.

11
System efficiency
12
2003 FEC Competition Results
  • Competition in Raleigh, NC. (May 2003 )
  • 4 finalist teams, 1 semi-finalist
  • Testing facilities provided by Advanced Energy
  • University of Illinois
  • 2nd place overall (7500)
  • Best Technical Presentation (2500)

13
2003 FEC Team
14
2005 FEC Team
15
How do we build a winning system?
  • Everything must work
  • Should have plenty of time for system integration
  • Must achieve higher efficiency
  • Must maintain low cost
  • Must innovate
  • Potentially follow multiple paths

16
Motor Concepts
  • PMSM? Investigate
  • Cost issues
  • Induction Motor
  • Needs to be a lower slip design
  • Investigating exterior rotor for higher inertia

17
Topology Concepts
  • Boost PFC
  • Well-known industrial solution
  • Ideal for unity power factor
  • Buck PFC
  • Relatively untried
  • Possibly more passives?
  • Lower voltage stresses on semiconductors
  • Block diagram doesnt change

18
Control Issues
  • Use inertia of motor
  • Free energy storage element
  • May displace capacitive energy storage
  • Need to address stability and instantaneous power
    flow
  • Otherwise shape current
  • Meet letter of specification, 0.8 PF
  • May be able to meet spec at a lower cost

19
Example WaveformsUnity PF vs. 0.8 PF
20
2005 Future Energy Challenge
  • Course offering ENG 491 fall and spring
  • 18 students currently involved
  • Mechanical Engineering
  • Electrical Engineering
  • Grad students will drop off as undergrads come up
    to speed
  • Students will be organized into sub-teams
  • Replaces senior design requirement for EEs

21
Summary
  • Competed effectively in 2003 Future Energy
    Challenge
  • Have several good ideas to build on, several
    lessons learned
  • Assembled a strong team to develop these ideas
    into a winning entry in 2005 Future Energy
    Challenge
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