Electric Cars Sound Off

by Carmel Duryea Morris on Wednesday, August 25, 2010

Apart from the famous Curtis PWM squeal (which actually resonates via the electric motor) most other electric cars are pretty quiet. Something we toyed with some time ago (but didn’t have the IP funds to push it through)…

Prius to offer optional noise to alert pedestrians:
http://news.cnet.com/8301-13506_3-20014511-17.html?tag=mncol;posts

Nissan Leaf brings the noise:
http://reviews.cnet.com/8301-13746_7-20007463-48.html

The sound, a sine wave sweeping from 2.5kHz to 600Hz, was designed to be audible to all age groups. At start-up, the sound comes on at its loudest to warn the visually impaired and other pedestrians that a car is about to enter their vicinity. When the Leaf is reversing, the system produces an intermittent sound, similar to the back-up warning systems on trucks.

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Who Needs Batteries?

by Carmel Duryea Morris on Thursday, August 19, 2010

A human powered car hits the road running. Appears somewhat light-on but could be just the thing for meat-head drivers heading for the local Hog’s Breath Cafe – they can exercise all those calories off on their way home!

http://www.dailymail.co.uk/sciencetech/article-1304120/The-human-powered-car-reach-speeds-60mph.html#ixzz0wzn2Wrxh

Plans are underway for mass production with added features such as, ahem, a cabin, traction batteries, air bags, ABS etc (and with all that added weight, good exercise will become a way of life!). Of course depending on what one eats, an exhaust pipe may also become a necessity.

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I knew Curtis was becoming more of a jerk lately. Someone suggested a failing section in the row of driving MOSFETS as a common controller issue. The old MOSFETS certainly get a punishing and as I read somewhere it’s like an old train driver giving instructions to the coal loaders for more power and the time delay for passing the instructions down the chain of command thus causes the jerky acceleration. Well, very basically so. I really didn’t want to open her up again so I thought I’d check everything else out first. Battery connections were fine, so I fiddled with connections to the pot box and hit the pedal. Whammo, much smoother! So out with the air-jet can and CRC electrical spray all around the pot and problem solved.

Spray a little kindness to your accelerator pot box. Your controller and battery pack will thank you.

Spray a little kindness to your accelerator pot box. Your controller and battery pack will thank you.

That spray has been handy for all sorts of reasons, even lubricating the door hinges. I rang a friend to confirm this and he said it can be a common issue with the standard pot box. They can fail eventually, by which time I may replace with a hall effect throttle when I get around to upgrading the speed controller.

Anyway, between 0 and 5K ohms resistance drops fixed easily. I wonder if a more sealed unit is available, in the mean time may consider a perspex lid to reduce dust ingress.

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Farewell to a Legend

August 12, 2010

It is a sad day when one has to let go of a beloved Starion. Regrettably, due to financial commitments and just ‘getting on with life,’ I have sold my ICE Starion GSRIII. This was a beautiful car to drive that I had once considered converting to electric. Being an automatic, I was advised against [...]

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White Zombi Continues to Tear Shreds off the Competition

August 9, 2010

Faster than any Nissan driver in Shaun of the Dead, and Zilla 2K controlled…. http://www.wired.com/autopia/2010/08/white-zombie-10-4-seconds/

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LiFeP04 chemistry needs the ingredient of TrUSt

July 29, 2010

An article on Bolivia’s potential wealth from massive lithium reserves was broadcast on ABC’s Feral Correspondent last night. Will the world’s drive to harvest this resource for electric vehicles be stifled by political parochialism and mistrust? More here: http://www.abc.net.au/foreign/content/2010/s2965757.htm

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Electric Car Battery Life

July 21, 2010

The debate is on again. You know the one; the ‘black art’ of keeping batteries healthy. I recently received an electric car newsletter discussing this very topic and summarizing that a battery that is partially charged is best for longevity. Is this true? And if so, for all battery types? Conversely it states that regular [...]

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IVy Pays Us a Visit

July 8, 2010

Today the IVy team from UNSW paid our R&D shop a visit to talk EVs, batteries, solar power and other goodies. Following their successful CeBIT display, we’re the next lucky bunch to get a chance to see this amazing vehicle. While it’s possible for electric vehicles today to have solar as supplemental charging, we still [...]

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Baby It’s Cold Outside

June 16, 2010

Brrrr, cold Thundersky batteries perform surprisingly well in this climate. Mornings are around 8 degrees C at present, about 1 degree higher in my garage. Given the complaints many have about SLAs and cold weather causing battery sluggishness, there’s no noticeable decline in performance when I take my Thundersky pack for a drive on a [...]

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Curtis and More

June 4, 2010

Yes My Curtis 1231C motor speed controller has been a good little battler and still goes strong despite some jerkiness under acceleration, but it would be nice to have a little More power! It’s a second hand unit I purchased from ConvertUrCar and it has delivered some good miles. Last week I drove to an [...]

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ChargePoint Unplugged

May 31, 2010

ChargePoint, the electric car charging company, has established its first charging station in Sydney in downtown Glebe at Derby Place, where many electric cars owned by the elite alternative set are queuing to take charge. Similar stations have been in London for some years now, such as ElektroBay, servicing the G-Wiz vehicle et al, some [...]

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Better Place (aka Batter Plaice) have a Whale of a Time in Tokyo

May 5, 2010

Some more swapover news, courtesy of allcarselectric.com… http://www.allcarselectric.com/blog/1044370_better-place-launches-battery-swap-test-in-four-tokyo-taxis And a slight digression, why aren’t these electric?? http://www.ecarshawaii.com/the-auto-moto.html My apologies for not writing more stuff lately, but I’ve been very sick for weeks now and am now on some body-wrecking drugs. If only I could plug myself into a wall socket at night I’d be bright [...]

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