Search found 22 matches

by PeterS
Sun, 20 Jan 2013, 19:11
Forum: Technical and conversion discussion
Topic: Plug Braking
Replies: 16
Views: 2301

Plug Braking

Ohmboy, If you're upgrading to a Soliton controller which presumably has more grunt than a Curtis, then you won't have to change gear. My Holden Combo is fitted with a Zapi controller and goes everywhere in 3rd gear; from starts on steep hills to 100kph, all in the one gear (I have to watch the revs...
by PeterS
Tue, 24 May 2011, 02:41
Forum: Electric motors and controllers
Topic: Faulty ZAPI
Replies: 8
Views: 1793

Faulty ZAPI

I fitted a Zapi H3 to my Combo EV and have driven 6000kms trouble-free with it since. It works very well with my 9" ADC series motor. The only limitations are that you are limited to a 120V battery pack; you should program the regen current to less than 80 amps; and mount it or shroud it so moisture...
by PeterS
Wed, 12 Jan 2011, 03:22
Forum: Batteries, charging, management and monitoring
Topic: Burnt Terminals
Replies: 3
Views: 683

Burnt Terminals

I suffered the same problem on one of my first trips in my EV.   I melted a battery post on a Trojan battery because I hadn't tightened the nuts sufficiently.   The damage was so bad I had to buy a replacement battery. I had been worried that excessive tightening would pull the threads out of the le...
by PeterS
Thu, 28 Oct 2010, 14:23
Forum: Batteries, charging, management and monitoring
Topic: Battery charging problem
Replies: 15
Views: 2002

Battery charging problem

What brand of batteries did you fit this time, Ron?
by PeterS
Thu, 28 Oct 2010, 13:40
Forum: Electric motors and controllers
Topic: Experience with a Zapi controller
Replies: 22
Views: 5585

Experience with a Zapi controller

As regards how things have worked out; I've now driven 5000kms with the Zapi and the more I use it, the more I like it. I experimented with the max current limit and found that as I increased the max, the start-off current increased also. I now have the limit set to 750A (previously 600A), although ...
by PeterS
Wed, 27 Oct 2010, 20:45
Forum: Technical and conversion discussion
Topic: regenerative brakes
Replies: 22
Views: 3090

regenerative brakes



I suggest you read my post on a Zapi controller I'm using. It has regen as a built-in feature to be used with series motors.
">here
by PeterS
Fri, 22 Oct 2010, 19:26
Forum: Batteries, charging, management and monitoring
Topic: Battery charging problem
Replies: 15
Views: 2002

Battery charging problem

Ron,

I'm guessing you won't be buying Crown batteries again. Thanks for keeping us updated on your unfortunate experience. Hopefully it will assist others in their battery brand buying decision.
by PeterS
Fri, 24 Sep 2010, 14:34
Forum: Batteries, charging, management and monitoring
Topic: Battery mount design
Replies: 15
Views: 2499

Battery mount design

Carv’n Marv’n, As a mechanical design engineer I have run some back-of-envelope calculations on your stainless steel rods. I can tell you they are not up to the job of restraining the batteries in the event of a roll-over. This is because the Australian design rules for EV’s require the battery rest...
by PeterS
Mon, 06 Sep 2010, 20:38
Forum: Batteries, charging, management and monitoring
Topic: Battery charging problem
Replies: 15
Views: 2002

Battery charging problem

OK Ron, all understood. It does seem that your batteries are the problem. You mentioned in your first post that two of the batteries are showing a voltage variation of 0.5V from the others (one lower and one higher). If your charger can do an equaliation charge that could bring all batteries to the ...
by PeterS
Mon, 06 Sep 2010, 17:14
Forum: Batteries, charging, management and monitoring
Topic: Battery charging problem
Replies: 15
Views: 2002

Battery charging problem

I might be able to help: I use Trojan T-105 LA batteries and have some experience with them not reducing current towards the end of the charge. My charger is a Zivan NG3 which is a fully automatic charger; ie, it awitches itself off when the batteries are fully charged. I would have thought the Wood...
by PeterS
Fri, 03 Sep 2010, 02:38
Forum: Technical and conversion discussion
Topic: Radios, EVs and bad electrical interferenc
Replies: 25
Views: 3247

Radios, EVs and bad electrical interferenc

Barney,

Have you tried grounding the motor case to the vehicle chassis? This greatly reduced (but did not completely eliminate) the hash from my EV's radio.   Use a short braided copper cable.

by PeterS
Mon, 19 Jul 2010, 02:38
Forum: Electric motors and controllers
Topic: Experience with a Zapi controller
Replies: 22
Views: 5585

Experience with a Zapi controller

Sorry Coulomb, I stand by my assertion that neither the field nor the armature of a DC motor has to be reverse connected for regen to occur. To be absoultely sure of what I'm saying I just now constructed a simple test bed using a small permanent magnet hobby motor. Using Meccano parts I put a 1/2" ...
by PeterS
Sun, 18 Jul 2010, 18:21
Forum: Electric motors and controllers
Topic: Experience with a Zapi controller
Replies: 22
Views: 5585

Experience with a Zapi controller

Some answers to the issues raised above: A DC motor does not have its field or armature reversed to become a generator. A motor will become a generator if its back EMF exceeds the supply voltage. The current simply reverses direction in the armature and flows out of the motor into the battery. To ge...
by PeterS
Sat, 17 Jul 2010, 23:17
Forum: Electric motors and controllers
Topic: Experience with a Zapi controller
Replies: 22
Views: 5585

Experience with a Zapi controller

That's an interesting thought but it wouldn't work because the switching has to be done in the right sequence. The foot-off-throttle signal has to be present when the main contactor puts power on the Zapi. Doing it the way you suggest would apply the throttle signal after the contactor closed. The Z...
by PeterS
Sat, 17 Jul 2010, 13:28
Forum: Electric motors and controllers
Topic: Experience with a Zapi controller
Replies: 22
Views: 5585

Experience with a Zapi controller

There has been discussion in recent posts about regenerative braking and Zapi controllers. Earlier this year I fitted a Zapi H3D controller to my Holden Combo EV and I would like to pass on my experience after 2500kms of driving with it. I purchased my Zapi from a UK company called Electrofit Zapi. ...
by PeterS
Wed, 16 Sep 2009, 17:31
Forum: General EV Discussion
Topic: EV Kilometres Covered
Replies: 6
Views: 1072

EV Kilometres Covered

This is a bit off topic, so I'll keep my comments about battery life brief. I expected to get about 2 years and 700 cycles out of my Trojans so I was very disappointed to only get 420 cycles in 15 months. I've recently heard of two other AEVA-Sydney members who've also got poor life out of their LA...
by PeterS
Tue, 15 Sep 2009, 17:57
Forum: General EV Discussion
Topic: EV Kilometres Covered
Replies: 6
Views: 1072

EV Kilometres Covered

Car:   2002 Holden Combo XC Completed: February 2008 Driven: 18,000kms (I drive 35kms to work) Average Wh/km Battery/Wall: 275 Range Now/Initial: Never tested but guess 75kms Batteries: Trojan T-105 (First set replaced at 15,000kms (15 months)) Motor: 9" Advanced DC Controller: Curtis Best Bit: Elec...
by PeterS
Thu, 02 Jul 2009, 19:38
Forum: Batteries, charging, management and monitoring
Topic: Changing a Zivan NG3 charge profile for Lithium
Replies: 1
Views: 1217

Changing a Zivan NG3 charge profile for Lithium

Hi Mal, My experience with an NG3 is that the charge curve can only be changed by changing the micro. I'm just going through the exercise myself at the moment with the help of M+H Power in Melbourne. Ring Chandi on 03 9765 0524 and have a chat about the different charge curves available. He is a VE...
by PeterS
Thu, 05 Mar 2009, 19:48
Forum: Technical and conversion discussion
Topic: motor selection advice needed
Replies: 6
Views: 1017

motor selection advice needed

Hey Woody! You keep mentioning that I upgraded from a 6.7 to an 8 inch motor in my Combo. The upgrade was in fact from an 8" to a 9" motor. The main reason I changed was because the 8" motor got very hot on hot days (over 30 degrees) and seemed to produce less and less power the hotter it got. I've ...
by PeterS
Fri, 12 Dec 2008, 20:09
Forum: General EV Discussion
Topic: Insurance
Replies: 37
Views: 3842

Insurance

I was given a quote for comprehensive cover by AAMI, no trouble at all. But my EV was built in 2002, so asking to insure it for $20,000 probably sounds reasonable. If it had been a 1982 model, the requested value may have been incomprehensible to the insurer's risk assessors. I suggest you give AAMI...
by PeterS
Mon, 24 Nov 2008, 17:47
Forum: General EV Discussion
Topic: Quiet Vacum Pump
Replies: 2
Views: 437

Quiet Vacum Pump

Barry, I got my Thomas pump to be very quiet by building a silencer for the air discharge, and by double-isolating the mounting. Of these measures, the silencer is the most effective. I got a piece of 90mm PVC downpipe about 250mm long and bought matching endcaps for it. I obtained a sheet of 25mm f...
by PeterS
Fri, 03 Oct 2008, 04:00
Forum: General EV Discussion
Topic: Heater-- Demister
Replies: 91
Views: 16284

Heater-- Demister

Hi all, I've been sitting on the side here reading all the posts about 240V ceramic heaters, and operating them at lower DC battery voltages. I thought I'd better pass on my own experience, to prevent disappointment. The fact is, ceramic heaters do not maintain a constant resistance. This means that...