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Re: If I increase my battery size, am I really gaining anything?

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  • wilf_nv
    Perhaps jump start the thread by asking some hands-on questions like what kind of battery you were proposing to use? wilf ... internal ... heavier ... torque,
    Message 1 of 6 , Aug 11, 2008
      Perhaps jump start the thread by asking some hands-on questions like
      what kind of battery you were proposing to use?

      wilf


      --- In beam@yahoogroups.com, "wilf_nv" <wrigter@...> wrote:
      >
      > Consider the following:
      >
      > 1) The change from 4.8V to a 6V battery does not necesarily mean an
      > increase in battery weight. I suggest two LiPo batteries of same
      > amp/hr will be lighter than the 4.8V NiCd battery you are using.
      >
      > 2) Increasing the battery voltage increases torque, RPM and
      internal
      > heat dissipation. Determine if your motor can handle the higher
      > voltage.
      >
      > 3) Consider using PWM to regulate torque and power.
      >
      > 4) Consider using smaller diameter tires to increase torque.
      >
      > wilf
      >
      >
      > --- In beam@yahoogroups.com, "garvinguy" <garvinguy@> wrote:
      > >
      > > I need a bit more power because my bot is turning out a bit
      heavier
      > > than planned. I started to order some motors that had more
      torque,
      > > but I realized I might be able to save some money by ordering a
      > bigger
      > > battery which would make my motors more powerful. The problem
      is
      > the
      > > trade-off of weight and torque.
      > >
      > > Right now I'm using a 4.8V battery that weighs 3.1oz, using a
      power
      > > supply of this size gives my motors about 42 oz/in of torque.
      > >
      > > If I increase my Battery power to a 6V battery, the motors will
      > give
      > > about 57 oz/in of torque. This battery will weigh 4.3 oz.
      > >
      > > My problem is I don't know how to measure the trade-off. I will
      be
      > > getting more torque by increasing the battery size, but I will
      also
      > be
      > > increasing the weight of what the bot will have to carry.
      > >
      > > My question is, will I be gaining anything by increasing my
      battery
      > to
      > > 6V and adding 1.3oz to the load my bot will have to lift?
      > >
      > > Many Thanks
      > >
      >
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