{"id":1490,"date":"2010-05-29T22:15:09","date_gmt":"2010-05-30T05:15:09","guid":{"rendered":"http:\/\/www.corbinstreehouse.com\/blog\/?p=1490"},"modified":"2010-05-29T22:16:27","modified_gmt":"2010-05-30T05:16:27","slug":"plug-bug-powerenergy-required","status":"publish","type":"post","link":"https:\/\/www.corbinstreehouse.com\/blog\/2010\/05\/plug-bug-powerenergy-required\/","title":{"rendered":"Plug Bug: Power\/Energy Required"},"content":{"rendered":"

\n

This is an older post I never ended up publishing. Basically it is my process of how selection and research \u2014 especially with my particular commute and the hills I have to tackle.<\/em><\/p>\n

How much energy will my bug need for what I want it to do? How do I figure this out? I started out on the DIYElectricCar Forums\/Wiki page –\u00a0How Much Power Will I need?<\/a> This left a lot of unanswered questions, mainly because my physics is now 10 years old and rusty. So, I dug through some of my old books and read a bunch of stuff online and started making a spreadsheet in Numbers on my Mac. Strangely, I was re-reading a page from my old physics book and then ran into that\u00a0same<\/em> exact article on the web: \u201cTopic 2: Automotive Power<\/a>\u201d.<\/p>\n

I also discovered a few other people had made good spreadsheets, but it was still good practice to make my own. The ones I found:<\/p>\n

*\u00a0The Electric Auto Association of Nevada<\/a> has one made by\u00a0tomofreno.<\/span> Awesome.<\/span><\/p>\n

*\u00a0Cameron Software<\/a> has the first one I came across (click on \u201cDrive Power\u201d).<\/span><\/span><\/p>\n

*\u00a0EVConvert<\/a> – an online spreadsheet calculator.<\/span><\/span><\/p>\n

Using these as guides, I made my own; I\u2019ll post it when I finally stop tweaking on it.<\/p>\n

Now, I have about a 20 mile commute from the mountains to Apple. (The bottom of the chart to B on the left of the chart). But, I frequently go to\u00a0Planet Granite<\/a> to climb and want to be able to add that into my daily driving. I want to do this complete route, without charing. But, I\u2019m hoping that normally I will charge at work. The total distance is nearly 52 miles (normally 40 miles if I don\u2019t go to the gym). That\u2019s pretty tough for a homebuilt EV with the giant hill.<\/p>\n

\"map<\/p>\n

\u00a0<\/p>\n

Part of the problem is Highway 17. It is steep roughly a 4.5% average grade from Los Gatos to the top. I am upping it to 5% to round up for my number estimates. I want to be able to maintain the normal speed, about 50-55 mph (I\u2019m shooting for 55mph).<\/p>\n

I mapped it with iMapMyRide:\u00a0http:\/\/www.mapmyride.com\/ride\/united-states\/ca\/san-jose\/376127181995643458<\/a><\/p>\n

Elevation profile:
\"Screen<\/a><\/p>\n

It takes 33kw (44hp) of power to get up that hill, and has to sustain it for at least 7 minutes at 55 MPH to get me to the top. I need a motor rated for at least this. That eliminates a lot of options \u2014 especially the lower priced AC options like the Azure Dynamics AC24 and HPEV\u2019s AC50. One of the troubles I had with DC motor selection is that they usually have charts at really low voltages (72V), so I don\u2019t know how they will perform at higher voltages (ie: 154V). The WarP 9 is rated up to 170V.<\/p>\n","protected":false},"excerpt":{"rendered":"

This is an older post I never ended up publishing. Basically it is my process of how selection and research \u2014 especially with my particular commute and the hills I have to tackle. How much… [read more]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[34],"tags":[],"class_list":["post-1490","post","type-post","status-publish","format-standard","hentry","category-electric-bug"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.corbinstreehouse.com\/blog\/wp-json\/wp\/v2\/posts\/1490","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.corbinstreehouse.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.corbinstreehouse.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.corbinstreehouse.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.corbinstreehouse.com\/blog\/wp-json\/wp\/v2\/comments?post=1490"}],"version-history":[{"count":3,"href":"https:\/\/www.corbinstreehouse.com\/blog\/wp-json\/wp\/v2\/posts\/1490\/revisions"}],"predecessor-version":[{"id":1493,"href":"https:\/\/www.corbinstreehouse.com\/blog\/wp-json\/wp\/v2\/posts\/1490\/revisions\/1493"}],"wp:attachment":[{"href":"https:\/\/www.corbinstreehouse.com\/blog\/wp-json\/wp\/v2\/media?parent=1490"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.corbinstreehouse.com\/blog\/wp-json\/wp\/v2\/categories?post=1490"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.corbinstreehouse.com\/blog\/wp-json\/wp\/v2\/tags?post=1490"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}