Direct-current (DC) motor with arc-extinguishing device

Direct-current (DC) motor with arc-extinguishing device

  • CN 102,570,725 A
  • Filed: 12/31/2011
  • Published: 07/11/2012
  • Est. Priority Date: 12/31/2011
  • Status: Active Application
First Claim
Patent Images

1. DC motor with arc-extinction device;

  • Comprise rotor and shell;

    The commutator of being made up of a pair of first commutator segment and second commutator segment is housed on its rotor at least;

    A pair of first commutating brush and second commutating brush correspondingly are housed in the DC motor shell at least, are connected a direct current power supply between said first commutating brush and second commutating brush, it is characterized in that;

    said DC motor also comprises an arc-extinction device;

    Said arc-extinction device comprises at least one pair of the first extinguishing arc brush and the second extinguishing arc brush, and the crowbar circuit that connects the said first extinguishing arc brush and the second extinguishing arc brush;

    The said first extinguishing arc brush and the second extinguishing arc brush lay respectively in the DC motor shell, and be adjacent with second commutating brush with said first commutating brush, and be positioned at before said first commutating brush and second commutating brush by the rotation direction of motor;

    Said crowbar circuit comprises unidirectional turning circuit and inhales arc device, the wherein current opposite in direction of the sense of current of unidirectional turning circuit and DC power supply.

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