Automobile lead sectional area measuring method

Automobile lead sectional area measuring method

CN
  • CN 103,593,544 B
  • Filed: 08/14/2012
  • Issued: 02/08/2017
  • Est. Priority Date: 08/14/2012
  • Status: Active Grant
First Claim
Patent Images

1. a kind of automobile lead sectional area measuring method is it is characterised in that include step:

  • A () calculates according to conductor cross-section computing formula (1) and estimates conductor cross-section area A;

    A=I ×

    ρ

    ×

    L/Ud(1)B () estimates maximum current I according to what Current calculation formula (2) calculated that wire can bearmax

    Imax=(10 ×

    A+8)/2 (2)C () basis estimates maximum current ImaxSearch the standard maximum electric current I of couplingBWith gauge wire area of section AB

    D () estimates maximum current I described in judgingmaxWhether satisfaction checking formula (3), if it is, by described gauge wire sectionArea ABOutput, if it is not, then return to step (c);

    IB×

    α

    ×

    β

    >

    Imax(3)Wherein:

    In described conductor cross-section computing formula (1):

    I=P/U, I are current in wire, and P is vehicle-mounted appliance power, and U is supply voltage;

    ρ

    is conductor resistance rate, and L is that wire is longDegree;

    Ud=U1+U2, UdFor allowing the loss of circuit maximum voltage, U1For the loss of circuit maximum voltage, U2Damage for terminal maximum voltageLose;

    In described checking formula (3):

    The electric current reduction ratio that α

    brings for line set number;

    The electric current reduction ratio that β

    brings for ambient temperature.

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