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How does a vacuum motor work?

  1. Aug 9, 2012 #1
    I was wondering about the how the suction works? I got this cordless vacuum broom for free and it has terrible suction. It runs on like 7 or 8 recharge c battery's and I was wondering if i increased the amperage or voltage would the motor run faster and have more suction?
  2. jcsd
  3. Aug 10, 2012 #2
    I would not recommend increasing the volts/amps past the design specs, this will likely cause the motor to have a reduced lifetime, and may actually be dangerous to you (electrocution, motor catching fire / bursting).

    In terms of how these work, many of them are turbine based - i.e. a radial turbine. But there are many many variations as you can imagine.

    In general I would say that you won't be able to fix it yourself. The parts may be very tight tolerance that you can't replicate without CNC machines.
  4. Aug 10, 2012 #3


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    The clue is probably in the word "free". Designing and building an efficent compressor isn't easy. Probably the best you can hope for is that it produces a fairly high volume of air flow, not a high suction pressure with the inlet blocked.
  5. Aug 10, 2012 #4
    So increased air flow to the motor should increase the suction of the vacuum?
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