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Noisey controllers

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Hatchet
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Noisey controllers

Post by Hatchet »

I've been reading some blogs and there is a mention of controllers having a wHine that they just have to get used to. I think both were Curtiss controllers. Has anyone had the same? What 144V controllers are quite? I'd like to have the vehicle as quite as possible.

Thanks........Brett

zeva
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Noisey controllers

Post by zeva »

Hi Brett,

The only two controllers to do this are the Curtis 1231C and 1221C, and very few people like it!

They switch from the relatively inaudible 15kHz down to the annoying 1500Hz for low throttle settings as a protection mechanism in motors with high inductance (so the FETs don't have to switch on and off so quickly). It was introduced in the C revision because the inductance of some of the larger EV motors were causing problems. It's basically a bandaid solution for a flawed design - the FETs they use are about 20 years old, with relatively slow turn on/off times.

As for alternatives, there's a few but no particularly good options:

- CafeElectric Zillas are fantastic but have a 6 month waiting list.
- Kelly KDH14500 just aren't as powerful as they should be.
- LogiSystems are a new player; I hear good things but haven't tested any myself
- Belktronix have a comparable product but appear to be a bit of a backyard operation!
Ian Hooper
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"Never doubt that the work of a small group of thoughtful, committed citizens can change the world." - Margaret Mead
http://www.zeva.com.au

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Hatchet
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Post by Hatchet »

Thanks for the info. I'll do a search on them. Haven't heard of Logisystems or Belktronix before.

Brett

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Richo
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Post by Richo »

ZzzzZzzzZzzz buz buz buz
20 years ago! is that when they first switched over from valves?
I guess people back then complained about the valves glowing too much Image

Don't forget to add the Zeva controller!
No pressure!

Sneaking up on blind people in your quiet eV is banned Image

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Hatchet
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Post by Hatchet »

Had a look at Zeva website for the Zeva controller. Is it still in the making or ready to roll? Is it quiet?!


juk
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Post by juk »

we need to get that Jetsons transporter sound.

http://www.amazon.com/Hanna-Barbera-Car ... B0000033FC

number 65

zeva
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Post by zeva »

Yes, the ZEVA controller is on its way soon. I've had a prototype working on the testbench for a while now but the project went on the backburner when the Kellys arrived. Since they don't seem to be working out so well, the ZEVA controller is back on the high priority list - hopefully I'll have something available in the next few months.

A brief rundown on specs, the first release will be 144V nominal max and do about 600A max to the motor. Unlike the Curtis, it is microprocessor controlled so does a few nice things like variable current limiting, battery sag limiting, fault detection, status codes etc. It uses high power IXYS MOSFETs switching at 22kHz, so it's inaudible even to young people and never a 1500Hz whine!

I'll keep you all posted Image
Ian Hooper
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"Never doubt that the work of a small group of thoughtful, committed citizens can change the world." - Margaret Mead
http://www.zeva.com.au

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Richo
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Noisey controllers

Post by Richo »

Had a P plater pull up along side me in his ute the other day he had farm animal noises coming from under his bonnet.
I guess it was a cheap way to get those extra horses under the bonnet.
I happened to have a cd in my car with a song on it called "the wild life" so I put it on and turned it up. I guess he didn't get the humour as he wound his window up!

Andrew
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Post by Andrew »

why try and get more horses out of a ute? It's a Utility Vehicle, you don't race in a Utility Vehicle!!!
Haha if your sound system was as big as mine, it wouldn't matter if he wound his window up Image (it'd probably break his window)

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Richo
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Post by Richo »

P platers r so noob.
Yeah I miss my sub.
I'll wait for the conversion then get a new one.

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Thalass
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Post by Thalass »

I'll keep an eye on this controller of yours, Ian, since I'm wavering on the AC direct drive thing.
I'll drive an electric vehicle one day.

Andrew
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Post by Andrew »

Richo wrote: P platers r so noob.


EXCUSE ME!?! who you calling n00b?

Image

all good Image Image

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woody
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Post by woody »

Hey Hoops,

has your Zeva micro got a spare analogue output ? You NEED to output the jetsons noise (RPM matching) from the above post so people can plug it into their stereos...

cheers,
Woody

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Thalass
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Post by Thalass »

Or a separate sub under the bonnet, and a smaller speaker where the exhaust used to be! :P

It wouldn't have to be an analogue output, really, just a clock pulse for a PC or some kind of circuitry to modify the sound to match RPM.
I'll drive an electric vehicle one day.

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