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  • JGG高压电机引接线高压硅橡胶电缆
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    详细信息

    江苏春晨电缆有限公司生产供应JGG高压电机引接线高压硅橡胶电缆,电压与电流公式
    Formula of voltage and current

    将一个电阻接到交流电源上,如右图所示。电压和电流的关系可以根据欧姆定律来确定。即:
    Connect a resistor to an AC power supply, as shown on the right. The relationship between voltage and current can be determined according to Ohm's law. That is:
    交流电纯电阻电路图
    AC electric circuit diagram of pure resistance
    纯电阻交流电路欧姆定律
    Ohm's law of pure resistance AC circuit
    上述公式表面,交流纯电阻电路的基本性质是电流瞬时值与电阻两端电压的瞬时值成正比。
    On the surface of the above formula, the basic property of the AC pure resistance circuit is that the instantaneous value of the current is proportional to the instantaneous value of the voltage at both ends of the resistance.
    电阻两端电压有效值U和电阻中流过的电流有效值I的关系可由欧姆定律得出:
    The relationship between the effective value U at both ends of the resistance and the current effective value I flowing through the resistance can be derived from Ohm's law.
    欧姆定律
    Ohm's law
    在电阻大小一定时,电压增大,电流也增大。电压为零,电流也为零。即电流的正弦曲线与电压的正弦曲线波形起伏一致。所以在电阻负载电路中电压与电流是同相位的。
    When the size of the resistance is fixed, the voltage increases and the current increases. The voltage is zero and the current is zero. That is, the sinusoidal curve of the current is in accordance with the waveform of the sinusoidal curve of the voltage. So the voltage and current are in the same phase in the resistance load circuit.
    交流电功率公式
    AC power formula

    由于交流电路的电压和电流都随时间而变化,在任意瞬间,电压瞬时值u与电流瞬时值i的乘积为瞬时功率,用“p”表示:即:
    Because the voltage and current of AC circuit change with time. At any time, the instantaneous product of voltage instantaneous value u and current instantaneous value I is instantaneous power. It is represented by "P":
    正弦交流电纯电阻电路电功率计算公式
    Calculation formula for electric power of pure resistance circuit of sinusoidal alternating current
    由上述公式可以得知:电阻元件上瞬时功率由两部分组成,第一部分是常熟urir,第二部分是幅值为urir,并以2ω的角频率随时间按余弦规律变化的变量交流电功率。
    From the above formula, we can know that the instantaneous power of the resistance element is made up of two parts. The first part is Changshu urir, and the second part is the variable alternating current power with the amplitude of urir and the angular frequency of 2 Omega changing according to the cosine law.
    交流电电功率波形图供应JGG高压电机引接线高压硅橡胶电缆
    AC electric power waveform diagram
    上右图波形图中虚线所示,p为功率随时间变化的波形。它在一个周期内总是大于零,表面电阻元件总是吸收电能,即消耗功率。
    As shown by the dotted line in the image on the right image, the P is the waveform that changes the power over time. It is always greater than zero in a period, and the surface resistance element always absorbs electrical energy, that is, power consumption.
    瞬时功率虽然能表面功率在一周期内的变化情况,但是其数值不便于测量和计算,其实际意义不大。人们通常所说的电路的功率都是指瞬时功率在一周期内的平均值,称为平均功率或有功功率,以大写字母“P”表示,经数学推算可得:
    Although the instantaneous power can change the surface power within a period of time, it is not convenient to measure and calculate the instantaneous power, which is of little practical significance. Generally speaking, the power of a circuit refers to the average value of instantaneous power in a cycle. It is called the average or active power. It is represented by the capital letter "P".
    交流电有功功率计算公式供应JGG高压电机引接线高压硅橡胶电缆
    Calculation formula of active power of alternating current
    其单位为瓦塔,由上式可见,当电压和电流以有效值表示时,纯电阻电路中的平均功率的表示式具有和直流电路相同的形式。
    Its unit is Vata. It can be seen from the upper form. When the voltage and current are represented by the effective value, the expression of the average power in the pure resistance circuit has the same form as the DC circuit.

    • 品牌
      春晨
    • 型号
      JGG
    • 规格
      50
    • 材质
      黄铜
    • 适用范围
      500
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