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Vacuum cleaner

  • US 9,301,665 B2
  • Filed: 06/13/2014
  • Issued: 04/05/2016
  • Est. Priority Date: 06/13/2013
  • Status: Active Grant
First Claim
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1. A vacuum cleaner comprising:

  • a suction source comprising an impeller and a first motor for driving the impeller;

    a cleaner head comprising an agitator and a second motor for driving the agitator;

    a controller configured to generate control signals for controlling simultaneously the excitation of the first motor and the second motor; and

    a voltage sensor that provides the controller with a measure of the magnitude of a supply voltage used to excite the first motor and the second motor,wherein the first motor is a brushless motor and the second motor is a brushed motor, and the controller generates the controls signals such that the output power of the first motor is constant and the input voltage to the second motor is constant in response to changes in the supply voltage.

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