如何使用 UliEngineering 在 Python 中通过相位角计算功率因数

你可以使用 UliEngineering Python 库轻松地通过相位角计算功率因数：

TechOverflow calculators:
You can enter values with SI suffixes like 12.2m (equivalent to 0.012) or 14k (14000) or 32u (0.000032).
The results are calculated while you type and shown directly below the calculator, so there is no need to press return or click on a Calculate button.

° ⚠

power_factor_by_phase_angle.py

from UliEngineering.Electronics.Power import power_factor_by_phase_angle
import math

# Compute power factor for 30 degrees phase angle
pf = power_factor_by_phase_angle(math.radians(30))
print(f"Power factor (30°): {pf:.4f}")

# Compute power factor for 45 degrees phase angle
pf = power_factor_by_phase_angle(math.radians(45))
print(f"Power factor (45°): {pf:.4f}")

# Compute power factor for 60 degrees phase angle
pf = power_factor_by_phase_angle(math.radians(60))
print(f"Power factor (60°): {pf:.4f}")

from UliEngineering.Electronics.Power import power_factor_by_phase_angle
import math

# Compute power factor for 30 degrees phase angle
pf = power_factor_by_phase_angle(math.radians(30))
print(f"Power factor (30°): {pf:.4f}")

# Compute power factor for 45 degrees phase angle
pf = power_factor_by_phase_angle(math.radians(45))
print(f"Power factor (45°): {pf:.4f}")

# Compute power factor for 60 degrees phase angle
pf = power_factor_by_phase_angle(math.radians(60))
print(f"Power factor (60°): {pf:.4f}")

示例输出

power_factor_by_phase_angle_output.txt

Power factor (30°): 0.8660
Power factor (45°): 0.7071
Power factor (60°): 0.5000

Power factor (30°): 0.8660
Power factor (45°): 0.7071
Power factor (60°): 0.5000

功率因数是交流电路中有功功率（瓦特）与视在功率（伏安）之比。它表示功率利用的效率，值为 1.0 表示效率完美（纯电阻负载）。相位角是电压与电流波形之间的差值，功率因数与该角度直接相关。

功率因数使用以下公式计算：$PF = \cos(\phi)$，其中 $\phi$ 为电压与电流之间的相位角（以弧度为单位）。相位角为 0° 时功率因数为 1.0（纯电阻），而相位角越大，功率因数越低（感性或容性负载）。

示例输出

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