江蘇春晨電纜有限公司生產ZR-JEFR開關櫃電纜 抽屜電纜，
單一參數正弦交流R、L、C（電阻/電感/電容）穩態電路
Single parameter sinusoidal AC R, l, C (resistance / inductance / capacitance) steady state circuit
文章目錄
Article directory
電阻元件的交流電路
AC circuit of resistance element
電感元件的交流電路
AC circuit of inductive element
電容元件的交流電路
AC circuit of capacitor
在正弦穩態交流電路中，各種電氣設備的模型可用電阻R、電感L、電容C以及它們的各種組合方式來表示。如白熾燈可視為純電阻，日光燈是由電阻和電感串聯組成的。為了研究交流穩態電路中電流、電壓、功率等問題，首先分析R、L、C這三種參數單獨在正弦交流電路中的電壓、電流、功率，為以後分析三種參數共同作用下的交流電路打下基礎。ZR-JEFR開關櫃電纜 抽屜電纜
In the sinusoidal steady-state AC circuit, the models of various electrical equipment can be represented by resistance R, inductance L, capacitance C and their various combinations. For example, incandescent lamp can be regarded as pure resistance, fluorescent lamp is composed of resistance and inductance in series. In order to study the problems of current, voltage and power in the AC steady-state circuit, the voltage, current and power of the three parameters R, l and C in the sinusoidal AC circuit are analyzed first, which lays the foundation for the analysis of the AC circuit under the joint action of the three parameters in the future.
電阻元件的交流電路
AC circuit of resistance element
如下圖所示的交流電路中，認為電阻R是理想線性電阻，其電流、電壓的參考方向已標注在圖中。
In the AC circuit as shown in the figure below, resistance R is considered to be an ideal linear resistance, and the reference direction of current and voltage has been marked in the figure.
電阻元件的交流電路
AC circuit of resistance element
電流與電壓的關係
Relationship between current and voltage
當加在電阻兩端的電壓為u=Umsinωt=U√2 sinωt時，並以它為參考量，則電阻上流過的電流為：
When the voltage applied at both ends of the resistance is u = umsin ω t = u √ 2Sin ω T, and it is taken as the reference quantity, the current flowing through the resistance is:
公式
formula
由上式可見，電阻上電流與電壓的關係為：
It can be seen from the above formula that the relationship between current and voltage on the resistance is:
電流與電壓是同頻率的正弦量；
Current and voltage are sinusoids of the same frequency;
電流與電壓的大小關係為：公式
The relationship between current and voltage is: Formula
相位相等，即φi=φu
Phase is equal, i.e. φ I = φ u
電流與電壓的波形見上圖b。用相量法表示電流、電壓之間的關係為：
See Figure B above for the waveform of current and voltage. The relationship between current and voltage expressed by phasor method is as follows:
公式
formula
相量圖如上圖c所示。上式也是交流電阻電路歐姆定律的相量形式。
The phasor diagram is shown in Figure C above. The above formula is also the phasor form of Ohm's law of AC resistance circuit.
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