Patent ID: 9707580
Date: 2017-07-18
CPC Classifications: B05B,F04D,H02K,H02M,H02P

Claim:
1. A rechargeable air-moving system for moving air, the rechargeable air-moving system being rechargeable by a domestic AC power source that provides a source voltage of at least 100 volts AC at a frequency of 40 to 70 hertz, the rechargeable air-moving system comprising: a housing defining an air inlet and an air outlet, the housing having a handle for manually supporting and manipulating the housing; a battery having a nominal voltage of less than 50 volts DC; an AC-DC power supply having a power supply input and a power supply output, the power supply input being connectable to the domestic AC power source to receive at least 100 volts AC, and the power supply output being connected to the battery, the power supply output providing a power supply output voltage of less than 100 volts DC; a step-up converter having a converter input and a converter output, the converter input being connected to the battery to receive the nominal voltage of less than 50 volts DC, the converter output providing a converter output voltage of at least 80 volts; an electric motor comprising a commutator, a stator winding, a rotor, and a rotor winding supported by the rotor; the commutator being rotatable relative to the stator winding and the housing, the rotor winding being rotatable relative to the stator winding and the housing, the rotor being rotatable relative to the stator winding and the housing, the commutator connecting the stator winding in series with the rotor winding, the stator winding being connected to the converter output to receive the converter output voltage of at least 80 volts, the rotor having a rotor outer diameter of 30 to 60 millimeters, the rotor winding having a rotor wire gauge size of 20 to 30 AWG; and a fan wheel coupled to the rotor such that the fan wheel and the rotor rotate as a unit at a rotational speed of between 10,000 and 50,000 rpm to produce a current of air flowing from the air inlet to the air outlet, the fan wheel having a fan outer diameter of 40 to 170 millimeters, and the motor receiving electrical power from the converter at a rate of 300 to 1,800 watts.