Search found 265 matches

by HeadsUp
Sun, 22 Nov 2009, 21:22
Forum: Electric motors and controllers
Topic: big batteries and step up DC converters
Replies: 69
Views: 19559

big batteries and step up DC converters

Or 40 x 200 Ah buddy pairs = 240 kg plus the same $940 worth of BMS. I have no idea why that works out lighter. but it does work out lighter and still saves well on BMS costs and cabling weight / joint resistance , plus the possibility that it helps to balance out issues with a weak cell if its bud...
by HeadsUp
Sun, 22 Nov 2009, 19:00
Forum: Electric motors and controllers
Topic: big batteries and step up DC converters
Replies: 69
Views: 19559

big batteries and step up DC converters

just thinking outside the box for a moment instead of using 200 x 40 AH cells = 300 kg pack plus $ 3900 worth of BMS. what about using 20 x 400 AH cells = 270 kg plus $ 940 worth of BMS plus of course a step up DC-DC converter to increase your 64 volt pack up to say 480 - 600 volt before sticking i...
by HeadsUp
Sun, 22 Nov 2009, 18:11
Forum: Batteries, charging, management and monitoring
Topic: Home grown BMS ideas !
Replies: 781
Views: 129595

Home grown BMS ideas !

Is this a test? My guess is 138Ah http://forums.aeva.asn.au/smileys/smiley1.gif in between bursts of high and noncomparative discharge wouldnt they tend to balance each other a little when in parrallel ? thinking the charge potential wont be as simple as saying 3 x 45 AH is pack capacity . http://f...
by HeadsUp
Thu, 19 Nov 2009, 20:27
Forum: Batteries, charging, management and monitoring
Topic: Dashboard Display Modules and Touchscreens
Replies: 37
Views: 6397

Dashboard Display Modules and Touchscreens

Apple will be releasing a 10in touch "sub-notebook" (oversized iPhone) early next year. Programmable? Just need external interface device. I'm no techo but the iPhone is really versitile whats its boot up and reset time ? as BGA pointed out , whatever is used must be instant and on demand with no b...
by HeadsUp
Thu, 19 Nov 2009, 17:44
Forum: Electric motors and controllers
Topic: cruise control
Replies: 22
Views: 3180

cruise control

As much as I love your idea (and have thought about it in the past), be careful claiming copyright to it, it already exists. I'm at work now, but i'll post up patent + uses of it when I get home tonight.. I wanted to do it a while back on my bike (non-electric), a speed-limit-defined cruise-control...
by HeadsUp
Thu, 19 Nov 2009, 04:00
Forum: Technical and conversion discussion
Topic: excel calculation spreadsheets motor torque
Replies: 2
Views: 3332

excel calculation spreadsheets motor torque

Speadsheet calculators for ;

Motor torque

motor_power.xls


Driving up slope
ExDriving_up_slope.xlscel

by HeadsUp
Thu, 19 Nov 2009, 02:37
Forum: Electric motors and controllers
Topic: cruise control
Replies: 22
Views: 3180

cruise control

GPS is not the solution, can't handle temporary speed zones, or ones that change due to weather conditions. Road side transponders with fixed receivers/transmitter in the vehicle is more flexible and traceable. in 10 - 15 years thats how it will probably be assuming the global monetary system doesn...
by HeadsUp
Thu, 19 Nov 2009, 02:21
Forum: Technical and conversion discussion
Topic: Cheap AC ICV
Replies: 69
Views: 9906

Cheap AC ICV

usually the motors would need some reduction, so you can use a chain or toothed belt from each motor and have them overlapping in the middle. Yes sorry i did intend mentioning suitability for Micro cars with 13 - 14 inch wheels but i got distracted by my stomach gurgling and also more suitable for ...
by HeadsUp
Thu, 19 Nov 2009, 01:59
Forum: Technical and conversion discussion
Topic: motor mounts
Replies: 5
Views: 1513

motor mounts


by request:

front wheel drive east west motor mount using three point mounting




Image
by HeadsUp
Thu, 19 Nov 2009, 01:38
Forum: Technical and conversion discussion
Topic: Cheap AC ICV
Replies: 69
Views: 9906

Cheap AC ICV


PS..... i know it needs a wheel alignment

the workshop guys just bolted the tyres'on temporarily for the photo shoot..........

Image
by HeadsUp
Thu, 19 Nov 2009, 01:36
Forum: Technical and conversion discussion
Topic: Cheap AC ICV
Replies: 69
Views: 9906

Cheap AC ICV


another option for mounting small inboard motors

note the tyres are special race compound donuts and not suitable for road use

Image

by HeadsUp
Wed, 18 Nov 2009, 15:24
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 65656

Nevilleh's BMW

ps if you cant get inside a chassis rail to put nuts onto a bolt , there are beautiful things called a nutsert or rivnut ( google it ) great for putting nuts inside a blind compartment , you may be able to use them without buying the special tool , i have air powered ones which are worth about $ 90...
by HeadsUp
Wed, 18 Nov 2009, 05:06
Forum: Electric motors and controllers
Topic: Regen braking bridge rectifiers
Replies: 59
Views: 13508

Regen braking bridge rectifiers

No idea what these price at , but they bolt direct to the IGBT's and will align in the same plane as the heatsink , so allowing the same heatsink to cool both the IGBT's and capacitors http://i318.photobucket.com/albums/mm416/HansOnn_2008/epcoscaps.jpg . got a price reply for those big phat EPCOS c...
by HeadsUp
Wed, 18 Nov 2009, 02:52
Forum: Electric motors and controllers
Topic: cruise control
Replies: 22
Views: 3180

cruise control


you mean navman ?

some of the in car GPS navigators have that function , but i wouldnt trust the data or notification to be 100 % accurate
by HeadsUp
Wed, 18 Nov 2009, 01:10
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 65656

Nevilleh's BMW

ps if you cant get inside a chassis rail to put nuts onto a bolt , there are beautiful things called a nutsert or rivnut ( google it ) great for putting nuts inside a blind compartment , you may be able to use them without buying the special tool , i have air powered ones which are worth about $ 90...
by HeadsUp
Wed, 18 Nov 2009, 01:05
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 65656

Nevilleh's BMW

what size screws are holding the battery box onto the chassis rails ? the last battery box i drew up for a BMW is pictured below you could probably use 40 x 40 x 4 angle coz you "only" have 55 kg of batteries but you have to consider the effect of vibration and twisting of the chassis under average...
by HeadsUp
Wed, 18 Nov 2009, 00:06
Forum: Batteries, charging, management and monitoring
Topic: Ponilion's LiFePo4,5-33C LiPolymer battery
Replies: 118
Views: 30331

Ponilion's LiFePo4,5-33C LiPolymer battery

its just a spelling problem contact www.Poni-lying [/QUOT] Headsup, it is series.Not joking ,ok ? You mean am i lying or a liner ? What do you based on ? http://forums.aeva.asn.au/uploads/689/refund_money.png means , if product is faulty , refund money or you never get sales again signed.......Skip...
by HeadsUp
Tue, 17 Nov 2009, 23:15
Forum: Electric motors and controllers
Topic: cruise control
Replies: 22
Views: 3180

cruise control


i think one day there will be roadside transponders everywhere that tell your car computer to limit speed to match that zone

by HeadsUp
Mon, 16 Nov 2009, 20:48
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 65656

Nevilleh's BMW

Thanks for those suggestions, I will check them out. The coupling does use the full length of the keyway when it is properly assembled and the couplings have a bolt into the centre of the shaft to secure them. no worries there are different types of fit for shaft couplings interference fit is when ...
by HeadsUp
Sun, 15 Nov 2009, 19:43
Forum: Electric motors and controllers
Topic: replacing an iron housing for Aluminium
Replies: 4
Views: 1086

replacing an iron housing for Aluminium

thanks i was playing with a few ideas i emailed the manufacturer of those 400 Hz motors in the US to see if i could import an armature and field winding but seems they aint interested. it wouldnt be that expensive to import the whole motor but i think their frame/housing is very poor quality and doe...
by HeadsUp
Sun, 15 Nov 2009, 05:37
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 65656

Nevilleh's BMW

i dont intend to criticise anything , but just a couple of design aspects to contemplate for troublefree motoring. the shaft coupling doesnt take advantage of the full length of keyed shaft available , check with torque tables for keyway length ( other than that .. love ya work , youre doing some b...
by HeadsUp
Sun, 15 Nov 2009, 04:44
Forum: Electric motors and controllers
Topic: replacing an iron housing for Aluminium
Replies: 4
Views: 1086

replacing an iron housing for Aluminium

been looking at a couple of pics of the field winding in motors with a cast iron frame and end caps if i pressed out the field winding and machined up new end plates as bearing carriers and made up a new housing to press the field winding into.... will that work , or do i need all that iron mass th...