High Efficiency electric propulsion

Discussion in 'Electric Propulsion' started by Fanie, Sep 23, 2018.

  1. Fanie
    Joined: Oct 2007
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    Fanie Fanie

    Hi guys,
    I've scanned the web to look for some electric motors suitable to drive a boat, and very disappointing found motors with brushes and pulley drives and gearboxes :( How primitive and overly expensive.

    This is the kind of motor that one wants to propel a boat with properly.

    KLD oneDrive Electric Vehicle Propulsion System - Energy for the Next Generation.
    The guy was friendly enough to actually tell you how it works !

    It uses ALL the poles in the motor, and not two thirds as in the case of a three phase motor. It is hence 30% more efficient off the bat. You do not need a gearbox. A motor like that has huge torque, that size motor delivers 200 to 250Nm, and if the proper materials are used as he explains, you won't have a prop speed issue either.

    Since all the magnetic coils are in series, the current is less, compared to a three phase motor. At startup a magnetic sensor is used to determine the rotation direction and the control electronics simply reverse polarity if it is in the wrong direction.

    I also see every one is into lithium batteries. Yes they are good but their life expectancy is poor, around 3 years if I have it right. Instead look for the LiFePO4 batteries. If you don't run them down below 50% capacity, they could last some 20 years. Yes they are bloody expensive, for me anyways, we don't have a currency in Sick Africa, but for you guys it will be a breeze. They also require a balancing circuit, which is a pain in the rudder.

    And then I also see solar panel efficiency seems to be promoted to around 25% as to the current 15% to 17% efficiency panels. If these are made available then it will already have a huge impact in what you can do with these panels, including running your vessel while charging batteries. Apparently they convert a larger spectrum of light into energy.
    There are some 1000W of power in one square meter of sunlight.

    Combine this with nice technology like you find on trolling motors with auto pilot, and you have an awesome setup. This could change "sailing" dramatically, as well as simplify sailboats :rolleyes: all those ropes... :eek:

    Had to try these smilies :cool:
     
    Last edited: Sep 23, 2018
  2. Angélique
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    Angélique aka Angel (only by name)

    The KLD Energy website http://www.kldenergy.com/ is out of order for some time now.

    Info from Bloomberg ---> Company Overview of KLD Energy Technologies, Inc.

    ‘‘ KLD Energy Technologies, Inc. engineers, develops, and manufactures propulsion systems for electric vehicles in the United States and internationally. The company offers oneDRIVE system, a propulsion and generation system for applications, such as two wheel electronic vehicles (EV), three wheel passenger EV, three and four wheel passenger EV, and wind turbines, as well as elevators, air conditioners, pumps, generators, and others. It also provides technical support, warranty and RMA, system integration, and OEM partner training services; and spare parts and upgrade kits. KLD Energy Technologies, Inc. has a strategic partnership with Samsung. The company was founded in 2007 and is based in Austin, Texas. It has additional offices in Morgan Hill, California; and Penang, Malaysia. On, April 10, 2018 the voluntary petition of Energy Technologies, Inc. for reorganization under Chapter 11 was converted to Chapter 7. It had filed for Chapter 11 bankruptcy on March 25, 2016. ’’

    ‘‘ The US Bankruptcy Court gave an order approving the bidding procedures relating to the sale of the substantially all the assets of KLD Energy Technologies, Inc. on February 7, 2018. ’’
     
    Last edited: Sep 24, 2018
  3. Fanie
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    Fanie Fanie

    Shame they didn't make it, but the intention was only to show what they did with the motor.
     
  4. Angélique
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    Angélique aka Angel (only by name)

    It would be nice if strategic partner Samsung develops the motor and systems further into a viable product and market it as such.
     
    Last edited: Sep 24, 2018
  5. Angélique
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    Angélique aka Angel (only by name)

  6. Fanie
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    Fanie Fanie

    Dejay likes this.
  7. philSweet
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    Location: Beaufort, SC and H'ville, NC

    philSweet Senior Member

    On that note, I just saw my first electric car ever on the road last week in North Carolina. And it had Carolina tags. I think it might have been a Tesla, I didn't recognize the logo or the car. I've seen a handful of hybrids before, usually with out of state tags, but this was the first all electric I've seen.
     
  8. Kingston
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    Kingston Junior Member

  9. Fanie
    Joined: Oct 2007
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    Fanie Fanie

    Then you will likely enjoy this one...
    White Zombie - Fastest Electric Car
     
  10. Fanie
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    Location: Colonial "Sick Africa"

    Fanie Fanie


  11. Christian Lucas
    Joined: Dec 2018
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    Location: Munich

    Christian Lucas Junior Member

    Hi Fanie,

    there are many ways to drive a motor . The 3 phase is very comon as industrie used it to drive maschines.
    I have worked for a motordesign company and we have cosen many different motordesigns . Years ago we use the modular magnet motor. This motor has for every stator tooth a separate 2 phase controler. This allowe you to have a motor where the magnetsystem has , say 18 magnetpoles and the stator can have 19 statorteeth . Such motor has very low coging and all coils are dirven full time. In the last time we used 3 phase motors with Separete phase sector design. This has only every second statorteeth a coil and are driven by normal 3 phase controler but there it is also possible to drive it with a controler that feed all the 3 phase full time, see picture. Also there are other very good motordesigns like the axial flux motors , the Oxford motor or the transversal flux motor . These are all very high torque motor designs.
    In the year 2000 i brought the sps outrunnerdesign to model builder world , a motordesign that is also a high torque motor that can also run slower , bigger and higher efficancy propellers. Have a look at model airplans , boat and drone coppters , they all use this small outrunnermotors in most aplicacions.Torquedo used this model motors for the first outborder design and for many other boat drives, i knew the people at Torqeedo when the start the bussines.

    Happy Amps Christian
     

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    kerosene likes this.
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