Search found 369 matches

by SciroccoEV
Thu Mar 21, 2024 2:28 pm
Forum: Nissan
Topic: RWD reduction box
Replies: 53
Views: 22591

Re: RWD reduction box

Some pictures of the Felten (Zero EV) rwd gearbox internals.
by SciroccoEV
Tue Jan 23, 2024 8:23 pm
Forum: Projects
Topic: [Driving] Freelander EV With Gen1 Leaf electrics and EVBMW VCU
Replies: 259
Views: 252618

Re: [Driving] Freelander EV With Gen1 Leaf electrics and EVBMW VCU

Informing the DVLA of errors on the V5C can get you into an infinite loop of ever more errors.

Correcting a spelling mistake on my address once resulted in two more. Fixing that led to the vehicle model description getting corrupted.
by SciroccoEV
Sun Jan 21, 2024 10:53 pm
Forum: Toyota/Lexus
Topic: L210 gearbox
Replies: 243
Views: 504244

Re: L210 gearbox

Field weakening is used to REDUCE the back EMF of the motor, reducing it's effectiveness as a generator. As motor rpm increases, it's output as a generator increases, so you would need to apply ever more voltage to keep it in the constant torque range. You can generate a bit more than battery voltag...
by SciroccoEV
Thu Sep 07, 2023 5:28 pm
Forum: General
Topic: EV car conversion hardware
Replies: 260
Views: 1185933

Re: EV car conversion hardware

I was at Cenex LCV yesterday and one of the interesting conversations I has was with AIS.

They produce a fire protection fabric that can be applied inside a battery case. It is not expensive and offcuts are available for evaluation.

https://www.aisltd.com/product/flexichar/q57/
by SciroccoEV
Sat Aug 05, 2023 7:54 pm
Forum: Battery Managment (BMS)
Topic: Switched ADC BMS
Replies: 175
Views: 32658

Re: Switched ADC BMS

Do I understand this correctly? BMS in itself can't control contactors Having the BMS control contactors is generally a bad idea because disconnecting the battery under load is a good way of killing inverters. You can get away with it in low power aplications, like power tools (they generally use M...
by SciroccoEV
Fri Jun 09, 2023 7:51 am
Forum: BMW
Topic: Info on BMW hybrid battery packs?
Replies: 436
Views: 521613

Re: Info on BMW hybrid battery packs?

It shouldn't be a difficult task to 'bell out' the connections between the two connectors.
by SciroccoEV
Sun May 28, 2023 9:17 pm
Forum: General
Topic: Service Disconnects who why where ?
Replies: 7
Views: 849

Re: Service Disconnects who why where ?

Not all OEM battery packs have a manual disconnect, the BMW hybrid packs don't for example. As long as you have contactors on both poles and some means of checking that those contactors have in fact opened that's OK. Stuck contactor detection is somethong you should really have anyway.
by SciroccoEV
Thu May 25, 2023 10:40 am
Forum: Projects
Topic: [WIP] Mazda Mx5 (MK2)
Replies: 54
Views: 26448

Re: Mazda Mx5 (MK2)

The simplest solution I can think of would be a nano and a uln2003 wired in parallel (or bigger fet, preferably through hole fet) that would give 100 percent for first second then ramp down quickly afterwards OBS you could go for lower powered chip than a nano but they are cheap on Ali and don't ne...
by SciroccoEV
Thu May 04, 2023 11:38 am
Forum: Projects
Topic: [DRIVING] VW Touran powered by Nissan Leaf [FINISHED]
Replies: 735
Views: 156378

Re: VW Touran powered by Nissan Leaf [FINISHED]

TBH thats impressively low even with the spike! With solar and a battery i rarely dip below 10kwh a day! When i'm charging its usually over 30. I have a total of about 4kW of PV and 5kWh of storage with a 2.5kW inverter. The only EV I currently have in use is the 2007 AC G-Wiz with 14 modules from ...
by SciroccoEV
Mon May 01, 2023 9:09 pm
Forum: Projects
Topic: [DRIVING] VW Touran powered by Nissan Leaf [FINISHED]
Replies: 735
Views: 156378

Re: VW Touran powered by Nissan Leaf [FINISHED]

You caused quite a spike in my consumption!
Screenshot 2023-05-01 220755.png
by SciroccoEV
Wed Apr 05, 2023 6:37 am
Forum: Events and Meetups
Topic: 2023 Spring UK meet-up
Replies: 40
Views: 7953

Re: 2023 Spring UK meet-up

janosch wrote: Tue Apr 04, 2023 8:01 am A bunch of us are meeting on the Friday at Fully Charged Live South Farnborough, you guys should come, its like £20 or so for a ticket.
I should be there on the Friday, I'll probably be going down in the ICE Lotus Excel. It would be a very tedious trip by G-Wiz.
by SciroccoEV
Tue Mar 07, 2023 8:17 am
Forum: Toyota/Lexus
Topic: L210 gearbox
Replies: 243
Views: 504244

Re: L210 gearbox

On the subject of gearing, there are many online calculators.

This is the one I use; https://www.boosttown.com/gearbox_diffe ... ulator.php
by SciroccoEV
Sun Jan 22, 2023 8:33 am
Forum: General
Topic: Wound rotor motors.
Replies: 10
Views: 1120

Re: Wound rotor motors.

One set of problems that can happen with induction motors is unwanted current flowing through the bearings causing havoc to the hard coating on the ball bearings, to solve that, if this problem can occur they insulate bearings at both ends of the motor. You only need to insulate one bearing to prev...
by SciroccoEV
Sat Jan 21, 2023 10:38 am
Forum: General
Topic: Wound rotor motors.
Replies: 10
Views: 1120

Re: Wound rotor motors.

Does that mean it has slip rings with carbon brushes for the rotor? Yes, the Zoe motor has a pair of sliprings. I found an image of the Zoe motor on the Speak EV forum. zoe temp.jpg There have been problems with the brushes, notably with carbon dust causing current leakage to the frame. The early Z...
by SciroccoEV
Sat Jan 07, 2023 9:05 am
Forum: Projects
Topic: [Driving] Freelander EV With Gen1 Leaf electrics and EVBMW VCU
Replies: 259
Views: 252618

Re: Freelander EV With Gen1 Leaf electrics and EVBMW VCU

You've got several low side output drivers, even on the first version of the VCU PCB design.

After a cursory look through the code, cobtactor control was implimented in V1.5

https://github.com/damienmaguire/Nissan ... Gen1_5.ino
by SciroccoEV
Fri Jan 06, 2023 10:08 pm
Forum: Projects
Topic: [Driving] Freelander EV With Gen1 Leaf electrics and EVBMW VCU
Replies: 259
Views: 252618

Re: Freelander EV With Gen1 Leaf electrics and EVBMW VCU

I take your point. Any suggestion how to achieve this? I've forgotten exactly which VCU you're using, but contactor control is often built in. The simplest automated setup I've done was on a 48V sysytem. I used a relay coil across the controller bus and a second relay coil across the precharge resi...
by SciroccoEV
Fri Jan 06, 2023 8:51 pm
Forum: Projects
Topic: [Driving] Freelander EV With Gen1 Leaf electrics and EVBMW VCU
Replies: 259
Views: 252618

Re: Freelander EV With Gen1 Leaf electrics and EVBMW VCU

I'm not a fan of sequencing contactors by dead reckoning. You should really be monitoring the bus voltage and abandoning a precharge if it takes too long.
by SciroccoEV
Sat Dec 31, 2022 12:04 pm
Forum: General
Topic: EV car conversion hardware
Replies: 260
Views: 1185933

Re: EV car conversion hardware

As far as the insulation rating of the ceramic PTC heater cores is concerned, the peak voltage of a 240VAC waveform is about 340VDC (VAC * SQRT 2). They're not designed for water exposure though. A droplet can bridge between the elements and cause problems. The whole point of them being PTC, positiv...
by SciroccoEV
Tue Dec 20, 2022 11:54 am
Forum: General
Topic: Registering and changing tax class of an EV conversion in the UK
Replies: 304
Views: 60496

Re: Registering and changing tax class of an EV conversion in the UK

More evidence that the DVLA is not fit for purpose.

by SciroccoEV
Fri Dec 16, 2022 12:29 pm
Forum: Classifieds
Topic: BMW i3 22kWh pack available
Replies: 4
Views: 1334

Re: BMW i3 22kWh pack available

I do still have the modules (main case is gone). I suspect shipping will be a deal breaker though.
by SciroccoEV
Sun Dec 04, 2022 7:21 pm
Forum: Events and Meetups
Topic: 2023 Spring UK meet-up
Replies: 40
Views: 7953

Re: 2023 Spring UK meet-up

I drove my Scirocco EV around the Haynes Museum test track in about 2001. The Cagiva Freccia conversion got an outing around there a few years later.
by SciroccoEV
Wed Nov 23, 2022 2:15 pm
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105149

Re: IPM Motor Simulation and FOC Software

johu wrote: Wed Nov 23, 2022 1:55 pm Prius likes over modulation very much! Cranked up modmax to 44000 and went for a drive

How about going to six step?
by SciroccoEV
Wed Nov 16, 2022 8:14 pm
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105149

Re: IPM Motor Simulation and FOC Software

Pete9008 wrote: Wed Nov 16, 2022 8:07 pm Was about to order this but just checked and it would be coming from the USA - £33.58 delivery :o so think I'll leave it!
If I can find room to set up my book scanner, I'll scan some of the more interesting chapters.
by SciroccoEV
Wed Nov 16, 2022 1:57 pm
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105149

Re: IPM Motor Simulation and FOC Software

That looks like a usefull refernce book, is it worth buying? It's a pretty good book, obviously a bit dated in places. It cost me something like £65 back in 1999 or so. There's a used copy on Amazon right now for £12, which is well worth it. The EV section of the book is based on work done by Motor...