热器是各种应用中用于精确测量温度的温度敏感阻力。 计算某一温度下热器的阻力对于精确的温度监测和控制系统至关重要。

理解热流器类型

热器主要有两种类型:NTC(负温Coacil)和PTC(Positive温Coacil). NTC热器随着温度升高而降低阻力,而PTC热器随着温度升高而增加阻力. NTC热器因其可预见阻力变化而常用于温度测量.

在特定温度下计算耐用性

使用Beta参数方程计算某一温度下的热力器的抗性:

]R ]=R25]×eβ(1/T-1/T25]]]]]]

· :

  • RT=温度T时的抗性(克尔文)
  • R 25 = 25°C(298.15K)时的抗药性.
  • β ] = beta参数(由制造商提供)
  • T = 开尔文温度
  • 25 =298.15K(25°C)

示例计算

相撞的热力在25°C时有10k的阻力,而Beta值为3950K。在50°C(323.15K)时找到阻力:

R50°C=10,000×e3950(1/323.15-1/298.15)]]

计算导出者 :

3950×(0.003095 - 0.003356)= -1.095 = - 1.095 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =

R[[FLT:cop]50°C = 10,000 × e[-1.095 = 10,000 × 0.34 = 3,340 ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇

结论

计算热量阻力涉及理解Beta参数和适用指数公式。精确计算使各种电子系统中的温度测量得以精确。