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长春负温度性质热敏电阻供应负温度性质热敏电阻,欢迎来电咨询!!
当NTCR热敏电阻在小电流下工作时(如图F),由于功率太底,其电阻保持固定而表现线性关系(符合欧姆定律V/R=1)。长春负温度性质热敏电阻如果电流增加,NTC热敏电阻就会产生焦耳效应(P =V×1)而使自己发热,其电阻值随即减小表现「电流增加,电压下降」的状态。
长春负温度性质热敏电阻When operating low current (see fig.F), due to very low power is unable to make the NTC thermistor self-heated, so its resistance value is thus maintained constant and displayed with a linear curve (in conformity with ohm-law V/R=1).If the current is increased, the NTC thermistor will follow Joule-efficiency(P= V×1) and make itself self-heated that results in a resistace value decreasing and thus displays with a status of voltage descending while current increased.
(如图F),说明NTC元件与环境达成热平衡所需的时间,主要决定于材料热容量(G)及散热系数(δ)。当元件温度由T1降到T0,则可得到下列平衡式:
-HdT=δ(T-T0)dt 其中-HdT=元件热损失
δ(T-T0)dt:元件散热量
积分后可得温度与时间关系式T-T1= (T0-T1)×e-t/t
其中τ=H/δ
当NTCR热敏电阻在小电流下工作时(如图F),由于功率太底,其电阻保持固定而表现线性关系(符合欧姆定律V/R=1)。长春负温度性质热敏电阻如果电流增加,NTC热敏电阻就会产生焦耳效应(P =V×1)而使自己发热,其电阻值随即减小表现「电流增加,电压下降」的状态。
长春负温度性质热敏电阻When operating low current (see fig.F), due to very low power is unable to make the NTC thermistor self-heated, so its resistance value is thus maintained constant and displayed with a linear curve (in conformity with ohm-law V/R=1).If the current is increased, the NTC thermistor will follow Joule-efficiency(P= V×1) and make itself self-heated that results in a resistace value decreasing and thus displays with a status of voltage descending while current increased.
(如图F),说明NTC元件与环境达成热平衡所需的时间,主要决定于材料热容量(G)及散热系数(δ)。当元件温度由T1降到T0,则可得到下列平衡式:
-HdT=δ(T-T0)dt 其中-HdT=元件热损失
δ(T-T0)dt:元件散热量
积分后可得温度与时间关系式T-T1= (T0-T1)×e-t/t
其中τ=H/δ
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