Estate cars / wagons.

[MuZiZZle]

Originally Posted by MartinObviously

No.

engine > generator > batteries > motor > wheels. Is what I mean.

All electric cars are just battery > motor > wheels

Hybrids are Engine > gearbox > Wheels & motor assist

I was on about torque, I may make electric cars, maybe, a bit, ish.

the leaf is 100% electric and has a gearbox btw

[MartinObviously]

Originally Posted by MuZiZZle

I was on about torque, I may make electric cars, maybe, a bit, ish.

the leaf is 100% electric and has a gearbox btw

That's cos the leaf has so little power, I'd imagine. Unless you're being picky, in which case a 2:1 reduction gear is technically a gearbox.

I don't get why the can't just make them direct drive, it's less loss.

I was meaning a setup like a train in a car.

[MuZiZZle]

Originally Posted by MartinObviously

That's cos the leaf has so little power, I'd imagine. Unless you're being picky, in which case a 2:1 reduction gear is technically a gearbox.

I don't get why the can't just make them direct drive, it's less loss.

I was meaning a setup like a train in a car.

without the box they actually rip themselves apart, they tried that

[MartinObviously]

Originally Posted by MuZiZZle

without the box they actually rip themselves apart, they tried that

Dat torque doe

Shit aye, just looked up the spec. an 80KW motor hahahaha xD

Single speed reduction gear of almost 8:1

[MuZiZZle]

Originally Posted by MartinObviously

Dat torque doe

Shit aye, just looked up the spec. an 80KW motor hahahaha xD

Single speed reduction gear of almost 8:1

zzzzzzzzzzzzzzzzzzzzzt *bang*

[mechsman]

Originally Posted by MartinObviously

That doesn't count as it's only turning a Generator, the batteries power AC motors - which means maximum torque from 0 speed.

That system in a car would make it rapid off the mark as well.

Not normally any batteries involved in locos. Some locos are D.C. traction motors as well. Hi/lo gearing is achieved by switching the motors from series to parallel wiring, and/or switching the two motor windings from series to parallel (or field weakening), although this does depend on the motor type.

Originally Posted by MartinObviously

That's cos the leaf has so little power, I'd imagine. Unless you're being picky, in which case a 2:1 reduction gear is technically a gearbox.

I don't get why the can't just make them direct drive, it's less loss.

I was meaning a setup like a train in a car.

Main reason that electric cars aren't normally direct drive is the motor flexibility required. In general you can build an electric motor to make loads of torque, or loads of revs, but it's very difficult (expensive) to do both. Also, a motor that could shift a fully loaded car from standstill as direct drive would be very heavy and suck down a shed load of amps on startup.

Originally Posted by MartinObviously

Dat torque doe

Shit aye, just looked up the spec. an 80KW motor hahahaha xD

Single speed reduction gear of almost 8:1

Much bigger motors out there. ;-). The fact that most motors can absorb up to 5x their rated power for short periods and it makes you realise the potential for electric drive trains.