1 Micro Electric Urban Vehicle Phase III Students: Nathan Golick Kevin Jaris Advisors: Mr. Gutschlag Dr. Anakwa.

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Micro Electric Urban VehiclePhase III

Students: Nathan Golick

Kevin Jaris

Advisors: Mr. Gutschlag

Dr. Anakwa

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Outline of Presentation

• Project Summary• Review of previous work• Functional Description• Block Diagrams• Functional Requirements• Performance Specifications• Equipment and parts list• Schedule of tasks to be completed

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Project Summary

• Create Simulink models for regenerative braking subsystem.

• Use additional DC motor to simulate vehicle braking dynamics.

• Use power electronics to recover energy provided by the additional DC motor during the simulated braking process.

• Investigate the option of implementing a variable speed motor drive.

• If time permits integrate completed design on the Miniature Electric Urban Vehicle (MEUV).

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Review of Previous Work: Phase I

• Researched all components of a micro electric vehicle.

• Created a drive model.

• Selected optimal components for a test platform.

• Built a prototype MEUV.

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Phase I Final DesignPhase I Final Design

• Motor– D&D Separately Excited

Brushed DC • Model: ES-10E-33• 8 HP Continuous• 6.7” Diameter• 11” Length• 56 lbs• 7/8” x 2” Shaft• 3/16” Keyway

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Phase I Final DesignPhase I Final Design

• Controller– Alltrax DCX600

• 24-48V Battery Input• 600 Amp Limit for 2

minutes• 30 Amp Field Winding

Limit • Standby current: < 35mA• Drives motor to 17 peak HP• 18 kHz Operating

Frequency• -25 C to 75 C Operating

Temperature– 95 C shutdown

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Phase I Final DesignPhase I Final Design

• Battery • Three 12 Volt Lead Acid Batteries

• 44 Ah Capacity each

• Low Cost

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Phase I Final DesignPhase I Final Design•Single speed gear reduction drive

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Review of Previous Work: Phase 2

• Create Simulink Models– Battery– DC Motor– Controller– Vehicle Dynamics – Data Collection (minimal)

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Project Description

• Use an additional DC motor to drive the go-cart motor and use power electronics to recover the kinetic energy during braking simulations.

• Use a controlled voltage on the additional motor to simulate various braking profiles applied to the go-cart motor.

• Model regenerative braking subsystem in Simulink.• Perform multiple simulations to verify the design.• Investigate the possibility of using a variable speed

drive to recover energy at lower speeds. • Integrate completed design with the Miniature

Electric Urban Vehicle (MEUV).

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System Block Diagram

DC Motor Drive Shaft Coupling Braking Power Electronics BatteryGo-Kart Motor

Braking Motor Controller (Voltage Profile)

Super Capacitors(Optional)

Battery Charger

Brake Input

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Functional Requirements

• Brake pedal shall apply regenerative braking up to approximately 75% displacement.

• Brake pedal shall apply hydraulic and regenerative braking above 75% pedal displacement.

• Power electronics shall optimize the recovery of the available kinetic energy.

• Batteries and possibly super capacitors shall store all energy recovered by the power electronics.

DC – DC Boost Converter

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Boost Converter Idealized Equation

Boost Converter Schematics

Vo/Vi = 1/(1-D)

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Equipment List

Vehicle Platform•Make: Vector Go Kart •Model #: 4170•Brakes: 7.5" hydraulic disc with parking brake•Tires (Front): 16"x6"x8"•Tires (Rear): 16"x7"x8"•Dimensions: 72"L x 46"W x 49"H•Wheel Base : 47.5"•Seat to pedals: 33" to 37"•Curb weight: 310lbs•Max. Rider weight: 300lbs

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Equipment List

Batteries(3)• Product ID: Interstate SLA1161• Type: Sealed lead acid• Voltage: 12V• Capacity: 44 Ah

Controller• Type: Alltrax DCX-600

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Equipment List

Motor (Go Kart)

• Type: D&D Separately Excited Brushed 24-48V DC Motor

• Model #: ES-10E-33

• Max power: 17HP

• Max speed: 3000RPM

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Equipment List

Braking Simulation Motor

•Type: Yet to be determined.

Voltage Profile Controller

•Yet to be determined.

Schedule of Future Tasks

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Date Nate Golick Kevin Jaris

Week 1 1/29/2013 Aquire additional motor Simulate power electronics

Week 2 2/5/2013 Design pedal displacement system Contruct power electronics

Week 3 2/12/2013 Create Simulink model of motor Create voltage profile

Week 4 2/19/2013 Test power electronics with additional motor

Week 5 2/26/2013 Test power electronics with additional motor

Week 6 3/5/2013 Remove go kart motor from MUEV Create Simulink model of regenerative braking

Week 7 3/12/2013 Mount both motors onto test platform

Week 8 3/26/2013 Test regenerative braking system

Week 9 4/2/2013 Test regenerative braking system

Week 10 4/9/2013 Test regenerative braking system

Week 11 4/16/2013 Mount regenerative braking system to MUEV

Week 12 4/23/2013 Test regenerative braking system on MUEV

Week 13 4/30/2013 Test regenerative braking system on MUEV

Week 14 5/7/2013 Finalize report and presentation

Week 15 5/14/2013 Presentation

Questions?

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