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Car-Driven Power Generator: Solutions for Generating 10kW+ (3-Phase) Using Passenger Vehicles

Szyszkownik Kilkujadek 14121 13
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How can I generate more than 10 kW of 3-phase power using a passenger car as the prime mover?

The thread’s practical answer is that you should not try to build a passenger-car PTO setup; for >10 kW it is simpler and more sensible to use a dedicated engine-generator set or a small tractor with PTO and an agricultural generator [#16599614] If you insist on a car-based solution, one suggestion was to use a separate used car engine and couple the clutch directly to a 10 kW generator, or to build a dyno-like roller drive with automation [#16594591] [#16594606] However, the car engine would need a stable RPM source and extra cooling, because the radiator fan alone may not be enough and an automatic transmission also needs cooling [#16594799] Another reply notes the setup is economically poor because of gearbox losses, large friction losses in the rollers, and tire wear [#16597873] For occasional use, the thread ultimately favors a stationary generator or a tractor-driven PTO solution rather than converting a passenger car [#16599614]
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  • #1 16594501
    Szyszkownik Kilkujadek
    Level 37  
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    Does anyone know any solutions that allow generating more than 10 kW (3-phase) powered by a passenger car?
    The aggregate would operate sporadically, only in the event of a power outage. The device would be installed in one place, permanently.
    The 12 V converter is out of the question, because the alternator is too weak. The generator would have to be driven by the engine without an alternator.
    I mean solutions similar to a power generator driven by an agricultural tractor with PTO.
    I am looking for a solution for a passenger car. Maybe some overrun rollers and wheel drive? Something like on dynamometers.
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  • #2 16594591
    brofran
    Level 41  
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    It would be less complicated to buy a used car engine (cost approx. PLN 500-1000) and to connect the clutch directly to a 10 kW generator.
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  • #3 16594606
    Łukasz.K
    Level 28  
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    Well overrun, take a welder, weld the frame, give some rollers like a car dynamometer, generator, automation for that and it's ready.
  • #4 16594799
    teskot
    Rest in Peace  
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    And has the author thought about how to keep the car's engine speed constant? The second problem is the cooling of its components - the fan on the radiator may not be enough. For this you need the air momentum generated while driving. An extreme case is a car with an automatic transmission that requires cooling.
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  • #5 16594819
    manta
    VIP Meritorious for electroda.pl  
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    Or maybe more info? Permanent installation in the car, added for a moment, the possibility of building a separate engine, let's call it the quality of the electricity? A lot of questions that the author should elaborate on ...
  • #6 16594830
    retrofood
    VIP Meritorious for electroda.pl  
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    BK_klp wrote:
    Does anyone know any solutions that allow generating more than 10 kW (3-phase) powered by a passenger car?
    The 12 V converter is out of the question, because the alternator is too weak. The generator would have to be driven by the engine without an alternator.
    I mean solutions similar to a power generator driven by an agricultural tractor with PTO.
    I am looking for a solution for a passenger car.
    Maybe some overrun rollers and wheel drive? Something like on dynamometers.

    Fortunately, the times of the ingenious Dobromir are over.
    Something that can be considered exotic, in the version above 10 kW is just a miscarriage idea. Rightly forgotten and undeveloped.
  • #8 16597806
    Anonymous
    Anonymous  
  • #9 16597817
    Szyszkownik Kilkujadek
    Level 37  
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    brofran wrote:
    It would be less complicated to buy a used car engine (cost approx. PLN 500-1000) and to connect the clutch directly to a 10 kW generator.

    Inconsistent with assumptions. Falling off.
    teskot wrote:
    And has the author thought about how to keep the car's engine speed constant?

    Yes. Cruise control can provide a constant speed. Sufficient accuracy.
    teskot wrote:
    The second problem is the cooling of its components - the fan on the radiator may not be enough. For this you need the air momentum generated while driving.

    Valuable notice. An additional fan may be needed. Stationary chillers have large coolers with large fans. It's not a coincidence. ;-)
    teskot wrote:
    An extreme case is a car with an automatic transmission that requires cooling.

    The automatic gearbox has a radiator. It's not a problem. Lock-up will be activated at constant speed, which will further reduce heat generation (reduce losses).
    retrofood wrote:
    Something that can be considered exotic, in the version above 10 kW is just a miscarriage idea.

    May I ask you to develop this thought? Why is this a crazy idea?
    retrofood wrote:
    Rightly forgotten and undeveloped.

    Any example of such "rightly forgotten"?

    Added after 1 [minutes]:

    jarekstryszawa wrote:
    And here I would argue http://patrykstal.pl/mercedes-123/
    Hehe. Good! I especially like "grounding". :-D
  • #10 16597873
    kortyleski
    Level 43  
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    An interesting topic, but economically unprofitable. Losses on the gearbox, huge losses on the friction gear (rollers). Car tires wear. It's really better to build a complete generator. A simple penny diesel costs less than two tires.
  • #11 16597887
    Szyszkownik Kilkujadek
    Level 37  
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    kortyleski wrote:
    An interesting topic, but economically unprofitable.

    At the outset, I forgot to write that it was supposed to be a unit for a part-time job. Not continuous.
    The economy of the solution is not a priority.
    kortyleski wrote:
    Losses on the gearbox, huge losses on the friction gear (rollers). Car tires wear.
    Right. This is a big disadvantage of this solution, but it is acceptable for occasional work.
    kortyleski wrote:
    A simple penny diesel costs less than two tires.
    Full agreement. But why not? I am afraid that such a diesel, after e.g. a year of downtime, will have a problem with starting.
    The car, on the other hand, is kept in good shape.
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  • #12 16597915
    kortyleski
    Level 43  
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    He won't have any problem. Maybe beyond battery health, but it can be done. However, an autonomous aggregate will be a relatively compact solution, which cannot be said about rollers for various cars. As you wrote yourself, any car. Compare the dimensions of the matiza and volvo xc90. The relatively mobile device will have the width of a caravan.
  • #13 16598208
    jarekstryszawa
    Level 23  
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    Alternatively, you can buy a tractor without the registration right for money and install the power unit on the PTO. For example, I have a Zetor 25 with a two-cylinder engine as a veteran, who only has a splitter attached https://youtu.be/4GQcRrsARrg This one is 100% original and registered, but you can easily hit something cheap. You will always resell when it is no longer needed.
  • #14 16599614
    Szyszkownik Kilkujadek
    Level 37  
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    So there is no need to combine. Either a factory autonomous diesel generator, or a small tractor with a PTO and an agricultural power generator. Thanks for participating in the discussion. :-)
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Topic summary

✨ The discussion revolves around generating over 10 kW of 3-phase power using passenger vehicles during power outages. Various solutions are proposed, including using a used car engine connected directly to a generator, creating a frame with rollers similar to a dynamometer, and maintaining constant engine speed for efficiency. Concerns are raised about cooling requirements and the economic viability of such setups, with suggestions leaning towards using a dedicated diesel generator or a small tractor with a power take-off (PTO) for better efficiency and reliability. The feasibility of using a passenger car for this purpose is debated, with some participants arguing against the practicality of the idea due to potential losses and wear on vehicle components.
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