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

2. 2 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

3. 3 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).

4. 4 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.

5. 5 Phase 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

6. 6 Phase 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

7. 7 Phase I Final Design Battery Three 12 Volt Lead Acid Batteries 44 Ah Capacity each Low Cost

8. 8 Phase I Final Design Single speed gear reduction drive

9. 9 Review of Previous Work: Phase 2 Create Simulink Models –Battery –DC Motor –Controller –Vehicle Dynamics –Data Collection (minimal)

10. 10 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).

11. 11 System Block Diagram

12. 12 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.

13. DC – DC Boost Converter 13 Boost Converter Idealized Equation Boost Converter Schematics Vo/Vi = 1/(1-D)

14. 14 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

15. 15 Equipment List Batteries(3) Product ID: Interstate SLA1161 Type: Sealed lead acid Voltage: 12V Capacity: 44 Ah Controller Type: Alltrax DCX-600

16. 16 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

17. 17 Equipment List Braking Simulation Motor Type: Yet to be determined. Voltage Profile Controller Yet to be determined.

18. Schedule of Future Tasks 18 DateNate GolickKevin Jaris Week 11/29/2013Aquire additional motorSimulate power electronics Week 22/5/2013Design pedal displacement systemContruct power electronics Week 32/12/2013Create Simulink model of motorCreate voltage profile Week 42/19/2013Test power electronics with additional motor Week 52/26/2013Test power electronics with additional motor Week 63/5/2013Remove go kart motor from MUEVCreate Simulink model of regenerative braking Week 73/12/2013Mount both motors onto test platform Week 83/26/2013Test regenerative braking system Week 94/2/2013Test regenerative braking system Week 104/9/2013Test regenerative braking system Week 114/16/2013Mount regenerative braking system to MUEV Week 124/23/2013Test regenerative braking system on MUEV Week 134/30/2013Test regenerative braking system on MUEV Week 145/7/2013Finalize report and presentation Week 155/14/2013Presentation

19. Questions? 19