ca7dbfe2c4
Used to determine the correct output voltage from the VFD also implements a latch-prohibit feature in PLC
25 lines
934 B
Python
25 lines
934 B
Python
from math import sqrt
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length = 10000.0 # feet
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current = 10.4 # Amps
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temperature = 250.0 # degress F
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k75 = 10.37 # 1.26 / 1000.0 # ohms of 1 circular mil foot of conductor
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circular_mils = 10384.0 # cross-sectional area in circular mils of conductor
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alpha_copper = 0.00393
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alpha_aluminum = 0.00330
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def voltage_drop(length, current, temperature, k75, circular_mils, alpha):
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return sqrt(3) * k75 * (1.0 + alpha * ((5.0 / 9.0) * (temperature - 32.0) - 20.0)) * length * current / circular_mils
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def calc_voltage_needed(input_voltage, voltage_drop):
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return input_voltage + voltage_drop
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motor_input_voltage = 380.0
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v_dropped = voltage_drop(length, current, temperature, k75, circular_mils, alpha_copper)
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v_output = calc_voltage_needed(motor_input_voltage, v_dropped)
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print("Voltage Drop: {} V, Output Voltage: {}, Motor Input Voltage {} V".format(round(v_dropped, 3), round(v_output, 3), round(motor_input_voltage, 3)))
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