matplotlib 三相交流电波形_使用python生成三相电压数据

import numpy as np
import scipy as sp
import matplotlib.pyplot as plt
import matplotlib.pylab as plb

# 
# 三相对称电压公式： 
# Ua = Vm*cos(ωt)
# Ub = Vm*cos(ωt - 2/3*π)
# Uc = Vm*cos(ωt + 2/3*π)
# Ua/Ub/Uc相位差120°, Vm幅度，ω角频率，t周期

# 频率f = 1 / T
# 周期T = 1 / f
# 角频率ω = 2π * f = 2π / T

Vm = 220
fHz=50
T=1/fHz
Tn = 5  #显示n个周期的波形
t = np.linspace(0, T*Tn, 360*Tn)
Ua = Vm * np.cos((2*np.pi*fHz) * t)
Ub = Vm * np.cos((2*np.pi*fHz) * t - (2/3)*np.pi)
Uc = Vm * np.cos((2*np.pi*fHz) * t + (2/3)*np.pi)

plt.plot(t, Ua, label='Ua')
plt.plot(t, Ub, label='Ub')
plt.plot(t, Uc, label='Uc')
plt.xlabel('Period/S')
plt.ylabel('Voltage/V')
plt.legend()
plt.grid()
plt.show()
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33