AC Conversion Homebuilt and fast!

2 Апр 2014 | Author: | Комментарии к записи AC Conversion Homebuilt and fast! отключены
MG Electric Cars

Eric Tischer’s AC Conversion

I got a chance to talk to Eric who’s done the best AC conversion I’ve ever I don’t mind saying. he’s got a degree in Mechatronic (mechanical engineering, computer-driven — sound familiar?) and has a of making major changes to but he says that anybody do a decent AC conversion, with the stuff, and it doesn’t have to so much.

Lynne: Why did you decide to an electric car?

Eric: I had a few other engine swaps my electric conversion.

In 1998 I did my engine conversion. I was 21 at the time. I a 1973 MG midget convertible and a RX-7 and decided to do a motor

It took me just over a from the time I bought cars, till the day the MG was driveable the RX-7 rotary engine and 5 The car was dangerously fast, especially I had the stock 155/80 r13 tires on it. The would wind up till the could no longer supply fuel, about 8k rpm.

The car sounded so sweet, but it was constantly axles and I decided to move on to better.

My second conversion was turbo flat 4 in a Porsche I designed the cooling system and core heater. I built the mounts and exhaust, fuel harness, and even designed a shift setup to replace the shift rods.

Believe it or it only took me 3 days to the car from an air cooled Porsche, to cooled Subaru. The car was not super and after destroying several motors I decided to upgrade.

The last turbo motor with a bang. It had a leaky gasket and was constantly backfiring.

One exploded the top of my intercooler off and in the rear mirror all I could see was a mini blowing though the rear lid! I eventually switched to the 2.7 flat six Subaru motor, and ran reliably for several years I sold it. The car sounded just a mean 911.

Eric’s Passat Conversion Video

Gas to Electric Car Conversion.

After I these cars, I wanted to do conversion, but something different, and where I can put my mechatronic skills to use. At the time, gas was around a gallon, so building an electric car was

Lynne: It just happened to with your interests to an AC conversion, then, and the price of gas it even more logical? No the whales or peak oil motivation?

Eric: The price of gas certainly my interest in making an electric It is a shame there are no affordable cars on the market, I think would sell quite For now the only way to get one is to build it.

How much did it

Lynne: How much did the project you, if you don’t mind me The reason I ask is that the control of an AC system is the most intimidating of building an AC conversion, and I’m to know if the diy factor brought the down. Not to pry or anything.

Not me.

Eric: I spent around 20k including the Part of that 20k was used to three motor controllers. The prototype blew up after a week of testing.

The second one was limited to controlling speed. The third one, I am still currently using can speed and torque. If I were to do the again from scratch, it probably be done for about

Half of that would be for batteries, battery management, and a

Lynne: This is a very price for a good AC conversion,

All that voltage!

Lynne: got a 300v system in your AC And air conditioning, too.

Dude, 300 is a whopper with cheese to most of our modest little DC conversions. I’ve heard a lot of complain about their AC having, quote, bus-like end quote, but they’ve gone 120v systems. Your AC on the other hand, doesn’t a bus in its acceleration at ALL, and I suspect 300v system might something to do with it.

Eric: The reason my car accelerates than some DC powered vehicles is because has more power. Power = rpm(torque)/5252

DC motors can only spin as as the battery voltage will it. For example, 100 volts might 2000 motor rpm. If you more speed 140 volts get you to 2800 rpm. An AC motor can at any speed regardless of voltage, the rpm is related to frequency. This is the of the 3 phase sine wave generated by the motor controller

My AC motor speed is limited by the about 10,000 rpm.

Lynne: You commute with car?

Eric: This car me to work everyday. I drive 20 miles at 65 mph, and this me to charge the car for about 3.5 hours at 18A The car will easily break but the fastest I’ve gone so far is mph. The car is about 500lbs than stock, with of that weight in the trunk.

I’ve driven the car about 450 in the last two weeks, I love how it is. My heart was beating so hard the time I drove it on the street, I was surprised it was actually working.


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