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The EVMaine Electric Car Project - Page 2 of 4 |
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Components and Materials Selection, Plus More Design Decisions This is the ultimate lightweight wheelmotor (from Australia): http://www.tip.csiro.au/Machines/success/sc.html Motor Controller/PWM: I will get a controller to match the motor. The guys at the link below put together "Engineered Systems" for DC Electric Vehicle Drives http://www.ev-america.com/suppliers.html Advanced DC Motors below, one of the best and most popular motor manufacturers: http://www.adcmotors.com/prod01.htm
My Final choice of motor: An Advanced DC Motor #A00-4009 rated 36-72 VDC, 6.7" diameter by 10.4" long with .875
Motor ADC #A00-4009 6.7" 36-72VDC 6HP Single Shaft This model of Advanced DC brand motor is recommended for electric vehicles up to 1,000 pounds.
The Biggest EV Parts Dealer in the Country www.evparts.com/firstpage.php?PHPSESSID=f6c3f64f3e486e584e5422724bccefba Motor Protection: I will wrap some window screening around the motor to prevent the entry of small rocks, and will provide plenty of cooling air for it.
This is a three-wheeled Doran kit car (electric) from the early ‘90’s http://www.evclubsouth.org/carfrm.html The link below is the above guy’s home page from which he describes two electric motorcycles as he’s building them. He also considers a CVT transmission to get better low AND top end performance. http://geocities.com/hendersonmotorcycles/ Curtis foot pedal source below: (potentiometer-accelerator). http://www.curtisinst.com/index.cfm?fuseaction=cDatasheets.dspListDS&CatID=12 Drive Wheel: I will use a # 630 chain and sprockets with about a six to one ratio. Safety Bumpers: This pdf file below outlines many schemes to increase bumper safety for pedestrians. The summary is really all that needs to be read. This site sells the Curtis 900r battery ‘fuel gauge.’ http://www.curtisinst.com/index.cfm?fuseaction=cDatasheets.dspListDS&CatID=25 I expect the weight of my finished vehicle with batteries will be less than 900 pounds. A photo of four battery electric vehicles being recharged in a city in France. They include an El Car (Germany), two Twikes (Switzerland) and a Kurrent (Italy first, but now from the US).
https://www.aurorasolarcar.com/main_frame.html A HOMEMADE AUSSIE ELECTRIC 3-WHEELER
THE CHARGER DESIGN FROM VANCOUVER, BC, CANADA
This is a .pdf file Click Here Below: I like the design of the bottom part of this double frame with battery storage under the driver for a very low center of gravity. I will also have my batteries under the driver.
Wheels: My front tires will be spoked, 26.5 inch outside tire diameter, Kevlar belted with a small tread area for reduced rolling friction. They will look funny on such a small car, but I don’t care because they should give a smoother ride on uneven pavement. A heavier motorcycle wheel and tire will be utilized for the single back drive wheel. I like this design. The running chassis on the right below, not the body on the left, parallels my design.
http://www.ent.ohiou.edu/~me470/SnrDesign05_06/me472/H3R_Design_Report_graded.pdf This document from the University of Ohio has lots of great engineering ideas in it. This is the best three wheel design document that I have found yet. Theft Protection Features: Keyed ignition switch, unusual looking vehicle (easy to find), locked grocery compartment, and eventually a lockable cockpit cab. Another small, one-person prototype EV below.
https://www.aurorasolarcar.com/main_frame.html
https://www.aurorasolarcar.com/main_frame.html
Here’s the nice aluminum frame of the SolarTaxi, an electric car that is now travelling around the World, although they’ve suffered some frame breakage problems..
Speedometer: An electronic biicycle speedometer with an odometer is the smallest and lightest option, But I’d prefer something with a bigger display. Speedo fixer: http://www.cyclepages.com/ProductGroupDisp.aspx?ProductGroupID=4600762 Frame Material: Square tubing steel. The Body: A fiberglass body could be made on screening placed on the car frame over plastic sheeting so it doesn’t stick to the car frame. The finished body could later be attached to the frame. Headlight: A car headlight with both high and low beams. The center of the headlight lens must be no less than 24 inches from the ground. Trailering the Car: I will get a trailer, and then make a custom car-carrying setup for it. Below is a very neat rear wheel setup with an E-Tek motor from Briggs and Stratton for a solar racer. Unfortunately this motor is not quite powerful enough for my considerably heavier-than-a-solar vehicle.
http://www.speedace.info/solar_car_mechanics_suspension_steering_and_brakes.htm The gear ratio here is about 6 to 1. Here is a handy Electric Vehicle Technology Forum where you can get some of your questions answered, although it appears to be mostly about two-wheelers: http://endless-sphere.com/forums/ Check out Yahoo Groups too, there are several pertaining to electric vehicles. Here’s an interesting front end below:
Two photos of a 1970 Bond Bug 3-wheeler
Plenty of solar panels here, almost enough to run it. http://jcwinnie.biz/wordpress/?p=1625
I like this one too
Here’s a good example of a separate body frame
A compact running gear solar car:
https://www.aurorasolarcar.com/main_frame.html Some Australian solar car materials and parts are discussed here: https://www.aurorasolarcar.com/beaming03_04/suzuka03/report_01.html My overarching goal is to keep both the weight and the cost of my vehicle to a minimum, and the range to a maximum. I think that is many people’s goal for their electric car. Top speed vs range per charge are trade-offs as long as todays batteries cannot store much electricity. When more energy-dense batteries are available at a reasonable price the usual reasons that most people reject electric cars will disappear, but Detroit will continue to fight them anyway. $6 a gallon gas would also speed up the acceptance process, and even $4 per gallon would make people start hating that SUV gas hog sitting in their driveway, not to mention that it would likely also torpedo the US economy. Tailight and Turn Signal Lights: I’ll use LEDs for less power drain. Two parking lights in the front and two taillights in the rear. Include a switch to turn off the front parking lights while the others are on. Below is a link to a very interesting website about some design flaws inherent in all 3-wheeled vehicles. In defense of my project, it seems to me that a relatively low-speed electric vehicle for running errands is not what this author is talking about when he discusses roll-overs during high speed turns. http://www.clevislauzon.qc.ca/Professeurs/Mecanique/ethierp/3-wheels/class3.htm Perhaps the professor above was referring to a vehicle that is a lot speedier than mine will be, such as the high speed, three-wheeled T-Rex that is shown below. Update: They are now finishing development of an electric version of the T-Rex 3-wheeler to be marketed soon in the U.S. for around $49 grand.
Side Mirrors: Break-away type for safety. I’ll get them at an auto supply store, and not skimp on size.
This underslung driver solar design leaves a more coherent panel top, but is too close to the road to be road legal and it dangerously restricts the driver’s view. https://www.aurorasolarcar.com/main_frame.html Windshielf Rearview Mirror: I’ll make sure it is a big one. Side rearview mirrors will be present. I will install a flat safety glass windshield. This basic and clean design is more to my liking:
https://www.aurorasolarcar.com/main_frame.html
Above: Another one, but surely it is too hot inside.
This design does not particularly appeal to me. http://www.blueskydsn.com/BugE_Concept.html Brakes: Sturdy disk brakes on all 3 wheels with a 2 wheels /1 wheel double master cylinder. A different interesting solar design, but again it is too low to be street legal.
https://www.aurorasolarcar.com/main_frame.html Accessories: I’ll install a standard 12 volt outlet in the dash for any accessories like my laptop computer. Again, this lightweight solar design below intrigues me, but mine will be considerably heavier than this one.
http://www.solarelectricalsystems.com/html/suncar.htm Read these info bits about solar car design - very good! http://www.speedace.info/solar_car_bodywork.htm
Let us know how you would do things, or have done things, differently. We will publish your comments.
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