Connecting electric motor to saildrive

Discussion in 'Electric Propulsion' started by andysailor, Jun 18, 2017.

  1. andysailor
    Joined: May 2017
    Posts: 9
    Likes: 0, Points: 1
    Location: Sweden

    andysailor Junior Member

    I´m planning to replace the diesel engine with an electric motor at around 12-20kw. It will be powered by a 20kwh LifePo4 bank.

    At the moment I´m thinking of connecting the electric motor to the current saildrive. It should work.
    Would it be best to direct mount it, or would it be better off to drive it with a belt or chain?

    If direct mounted, any particular coupler you would suggest?
     
  2. Caroute Motor
    Joined: Jun 2016
    Posts: 50
    Likes: 1, Points: 8
    Location: CN

    Caroute Motor Junior Member

    We only have 3KW outboard. For bigger, you can consider elco or torqeedo.
     
  3. andysailor
    Joined: May 2017
    Posts: 9
    Likes: 0, Points: 1
    Location: Sweden

    andysailor Junior Member

    I'm planning a project to connect a BLDC/PMAC motor to the current saildrive. I´m more asking about the coupler between motor and saildrive.
     
  4. CDK
    Joined: Aug 2007
    Posts: 3,310
    Likes: 140, Points: 63, Legacy Rep: 1819
    Location: Adriatic sea

    CDK retired engineer

    To mount your electric motor directly you must imitate the present construction. A large flange similar to the flywheel so you can mount a coupler there. Of course it can be much lighter, made from alloy.
    I would not use a chain or belt drive because that would put a radial load on the saildrive shaft.
     

  5. Jim Caldwell
    Joined: Aug 2013
    Posts: 261
    Likes: 6, Points: 18, Legacy Rep: 48
    Location: Cleveland, Ohio

    Jim Caldwell Senior Member

    Maybe put a bearing in the new flange?
     
    Barry likes this.
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