Search found 15 matches

by cj7hawk
Sun, 12 Jul 2015, 05:19
Forum: Scooters, mopeds and electric toys
Topic: Hybrid Electric Bicycle
Replies: 20
Views: 2533

Hybrid Electric Bicycle


All the vibration comes through the seat....

by cj7hawk
Sat, 11 Jul 2015, 21:02
Forum: Scooters, mopeds and electric toys
Topic: Hybrid Electric Bicycle
Replies: 20
Views: 2533

Hybrid Electric Bicycle

Fifth generation generator complete and tested - This is the first fully contained design, with everything housed and intended to work all weather - Technologically, it's a slight improvement on the fourth generation, but everything changed slightly - Still uses three fans for cooling. http://powerc...
by cj7hawk
Fri, 12 Jun 2015, 03:03
Forum: Scooters, mopeds and electric toys
Topic: Hybrid Electric Bicycle
Replies: 20
Views: 2533

Hybrid Electric Bicycle

Regen braking and Back EMF are pretty similar - main differences being that one is intentional, and the other not... And, of course, the regen braking comes in at any speed, while back-emf only occurs at higher speeds that the motor runs on the battery, and the power is either sucked away by dynami...
by cj7hawk
Thu, 11 Jun 2015, 06:59
Forum: Scooters, mopeds and electric toys
Topic: Hybrid Electric Bicycle
Replies: 20
Views: 2533

Hybrid Electric Bicycle

What sort of daily km are you doing? Must be a lot. I get about 30km out of a $100 lithium battery. I've done the opposite to you with voltage, running a 36v hub motor at 48v to get more speed out of it, but using a cycle analyst to limit the power to 200w. Eh? That's pretty impressive - I never kn...
by cj7hawk
Thu, 11 Jun 2015, 05:13
Forum: Scooters, mopeds and electric toys
Topic: Hybrid Electric Bicycle
Replies: 20
Views: 2533

Hybrid Electric Bicycle

Hi Rusdy, That's a pretty nice looking bike - very clean lines and I do like the solar charger ( I assume you use a voltage booster to direct-drive the battery charge? ) - you did a nice job on the conversion. The motor power was more co-incidence than intent. I started with 500 @ 48v and thought "I...
by cj7hawk
Wed, 10 Jun 2015, 04:25
Forum: Scooters, mopeds and electric toys
Topic: Hybrid Electric Bicycle
Replies: 20
Views: 2533

Hybrid Electric Bicycle

All up including the rear carrier rack? Less than 6kg difference. Given the size of battery pack I'd need to support the range I go, it weighs less than a battery of equivalent capacity - but you are correct that it needs struts on the carrier to take the load - I ride very carefully over bumps at t...
by cj7hawk
Thu, 04 Jun 2015, 06:00
Forum: General EV Discussion
Topic: Hybrid vs EV - Forum thoughts?
Replies: 8
Views: 815

Hybrid vs EV - Forum thoughts?

I much prefer pure EV as a concept. No ice servicing, no fuel, no oil, no extra unneeded weight....... I am long term planning a conversion that might have hybrid as part of its make up though....I use a ute for my gardening business, sometimes I do 30km, sometimes 150....and I'm usually towing a t...
by cj7hawk
Tue, 02 Jun 2015, 04:47
Forum: General EV Discussion
Topic: Hybrid vs EV - Forum thoughts?
Replies: 8
Views: 815

Hybrid vs EV - Forum thoughts?

Hi all,

I was just wondering what the general forum thoughts were on the topic of pure-EV or Hybrid EV ( Series or Parallel Hybrid ) -

Have many people made them, or is the thought to go pure EV and get rid of everything with an engine?

Regards
David
by cj7hawk
Mon, 01 Jun 2015, 20:28
Forum: The Lounge
Topic: Cheapest Commuting Challenge
Replies: 16
Views: 1080

Cheapest Commuting Challenge

Oops - Just realized a calculation error - I thought some of the numbers looked bigger than I had expected them to be based on earlier calculations and projections.... BTW, I'm working off of 200 commutes per year - so calculations are based on that, but this only affects the lifespan in years - Al...
by cj7hawk
Mon, 01 Jun 2015, 05:41
Forum: The Lounge
Topic: Intellegent Helmets
Replies: 7
Views: 413

Intellegent Helmets

Hmmm, I did develop such a system - It was an 800x600 VGA screen ( 0.4" ) that ran off of 2 x CR123 batteries, and could either sit over my eye while wearing my bike helmet ( I have a NV plate on my bike helmet ) or integrate a see-through reflector to direct the image over my FOV ( diopter adjusta...
by cj7hawk
Mon, 01 Jun 2015, 05:21
Forum: Scooters, mopeds and electric toys
Topic: Hybrid Electric Bicycle
Replies: 20
Views: 2533

Hybrid Electric Bicycle

Yes, well spotted - I'm using a 3kW motor derated to 1kW with additional forced cooling - It doesn't even get warm enough to feel the heat at 500w, so should handle 1kW with the wire on it - Rated to 1.5kW for 10 minutes without additional cooling and I use a direct-drive ducted fan to force air th...
by cj7hawk
Mon, 01 Jun 2015, 05:11
Forum: The Lounge
Topic: Hi All, A hybrid bike inventor in Perth here :).
Replies: 2
Views: 269

Hi All, A hybrid bike inventor in Perth here :).


LoL! No, but I did haunt the place for many years and did apply for a job there once while I was inbetween work ( didn't get the job ).

Most of those electronics, battery, etc are all from Jaycar.

( no, I don't work for Jaycar either ) :)

Regards
David
by cj7hawk
Mon, 01 Jun 2015, 05:10
Forum: The Lounge
Topic: Cheapest Commuting Challenge
Replies: 16
Views: 1080

Cheapest Commuting Challenge

so the life-cycle cost would be AUD1,600 / 800 trips = 2 bucks a trip (or 7.5 cents per km). Try to beat that! Sorry, you did throw down a challenge, so I'll answer that with my own hybrid petrol/electric system. Image taken two prototypes ago... It doesn't look all that different at the moment. ht...
by cj7hawk
Mon, 01 Jun 2015, 04:42
Forum: The Lounge
Topic: Hi All, A hybrid bike inventor in Perth here :).
Replies: 2
Views: 269

Hi All, A hybrid bike inventor in Perth here :).

Hi My first post to the forum - I've been wanting to make my own EV for commute for some time, but never expected it to be a bicycle - I posted about it here So I thought I'd drop in, say hi and introduce my project and see what else people were working on on the forum - :) The bike is designed for ...
by cj7hawk
Mon, 01 Jun 2015, 04:30
Forum: Scooters, mopeds and electric toys
Topic: Hybrid Electric Bicycle
Replies: 20
Views: 2533

Hybrid Electric Bicycle

Hi All, I've been working on a new idea and have read these forums before so thought i'd join the forum and introduce my project and try to find anyone else who has worked on a similar project. I don't know what the forum feelings around hybrids are - Some time ago, I wanted to build an electric car...