[Jonanderson3030]

Hi,
I would like to know a couple of things.
If I had a 3 phase generator and connected it to the a converted ev car would i be able to slow the drain on the batteries while driving?.
Also if I had a sufficient power source for the ev motor, if the motor was 5kw max consumption for example would i be able to connect the power to the cars system and drive without damaging the controller and batteries etc.
Thank you

 

[cyclops2]

What engine is going to drive the generator ? Would you still have a TOTALLY electical vehicle ?
Do you care if it is not ?

 

[Jonanderson3030]

At the moment I'm trying to find out if it is possible to have the engine draw power from an active source instead of the batteries or if the drain on the batteries can be slower, like if I connected solar or a generator while driving to keep the batteries topped up.

 

[EVfun]

If I had a 3 phase generator and connected it to the a converted ev car would i be able to slow the drain on the batteries while driving?.

No. Generators remove horsepower to make electricity. The power used by the drive motor will increase slightly more than the power you get from the generator (more due to losses in both the motor and generator.)

 

[Jonanderson3030]

No. Generators remove horsepower to make electricity. The power used by the drive motor will increase slightly more than the power you get from the generator (more due to losses in both the motor and generator.)

Would that still apply if the generator was providing all the electricity needs for the motor, for example if the motors max power consumption was 5 kw and the power generated was 5 kw and I connected that 5 kilowatts being generated to the power system (the batteries and motor) would that still run the motor or would I fry the batteries.

Or if I had a power supply of say half the power needs of the motor, say the motor was 5 kw and the generator was providing 2.5 kw would that slow the drain on the batteries by half meaning I would double the range.

 

[EVfun]

Would that still apply if the generator was providing all the electricity needs for the motor, for example if the motors max power consumption was 5 kw and the power generated was 5 kw and I connected that 5 kilowatts being generated to the power system (the batteries and motor) would that still run the motor or would I fry the batteries.

Or if I had a power supply of say half the power needs of the motor, say the motor was 5 kw and the generator was providing 2.5 kw would that slow the drain on the batteries by half meaning I would double the range.

That will NOT work. If the generator is making 5 kW then the motor will need to make the power required to move the car down the road, plus an additional 6 kW to supply the additional power being pulled off by the generator. If you expect the generator to only make 2.5 kW then you will have to pump an additional 3 kW into the motor.

1 horsepower = 746 watts

You must use watts to make horsepower, then use horsepower to generate watts. Neither the motor or generator are 100% efficient so you will have to put a few extra watts in. What you are proposing will actually reduce range.

 

[Ziggythewiz]

That will NOT work. If the generator is making 5 kW then the motor will need to make the power required to move the car down the road, plus an additional 6 kW to supply the additional power being pulled off by the generator. If you expect the generator to only make 2.5 kW then you will have to pump an additional 3 kW into the motor.

I think Jon is not suggesting to run a generator off the motor, but to use a generator (as in power source, gas, solar, whatever) to supplement the battery power that started fully charged before driving to increase the range. He is just asking if extra power can be added to the (otherwise closed) system to help out without damaging anything.

I think it probably depends on a number of variables, but I haven't connected panels to mine yet, so I can't say from experience.

 

[icec0o1]

Would that still apply if the generator was providing all the electricity needs for the motor, for example if the motors max power consumption was 5 kw and the power generated was 5 kw and I connected that 5 kilowatts being generated to the power system (the batteries and motor) would that still run the motor or would I fry the batteries.

Or if I had a power supply of say half the power needs of the motor, say the motor was 5 kw and the generator was providing 2.5 kw would that slow the drain on the batteries by half meaning I would double the range.

If you want an electric car to drive daily within its battery range and on a few occasions travel further, a gas/diesel generator would be ideal. Forget solar or any other energy sources. If you want a generator to always supplement your batteries, then forget about it completely and buy an economical, fuel efficient car.

 

[Jonanderson3030]

I think Jon is not suggesting to run a generator off the motor, but to use a generator (as in power source, gas, solar, whatever) to supplement the battery power that started fully charged before driving to increase the range. He is just asking if extra power can be added to the (otherwise closed) system to help out without damaging anything.

Hi
That is exactly what I was thinking, If I had a sufficient power source then added it to the system would the battery remain charged and the motor run from the power source instead of draining the battery, so the active power source powers the motor instead of the battery.