ZR-JEFR开关柜电缆 抽屉电缆

江苏春晨电缆有限公司生产ZR-JEFR开关柜电缆 抽屉电缆，

单一参数正弦交流R、L、C（电阻/电感/电容）稳态电路

Single parameter sinusoidal AC R, l, C (resistance / inductance / capacitance) steady state circuit

文章目录

Article directory

电阻元件的交流电路

AC circuit of resistance element

电感元件的交流电路

AC circuit of inductive element

电容元件的交流电路

AC circuit of capacitor

在正弦稳态交流电路中，各种电气设备的模型可用电阻R、电感L、电容C以及它们的各种组合方式来表示。如白炽灯可视为纯电阻，日光灯是由电阻和电感串联组成的。为了研究交流稳态电路中电流、电压、功率等问题，首先分析R、L、C这三种参数单独在正弦交流电路中的电压、电流、功率，为以后分析三种参数共同作用下的交流电路打下基础。ZR-JEFR开关柜电缆 抽屉电缆

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.

电阻元件的交流电路

AC circuit of resistance element

如下图所示的交流电路中，认为电阻R是理想线性电阻，其电流、电压的参考方向已标注在图中。

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.

电阻元件的交流电路

AC circuit of resistance element

电流与电压的关系

Relationship between current and voltage

当加在电阻两端的电压为u=Umsinωt=U√2 sinωt时，并以它为参考量，则电阻上流过的电流为：

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

由上式可见，电阻上电流与电压的关系为：

It can be seen from the above formula that the relationship between current and voltage on the resistance is:

电流与电压是同频率的正弦量；

Current and voltage are sinusoids of the same frequency;

电流与电压的大小关系为：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

电流与电压的波形见上图b。用相量法表示电流、电压之间的关系为：

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

相量图如上图c所示。上式也是交流电阻电路欧姆定律的相量形式。

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.