38 lines
1.2 KiB
Matlab
38 lines
1.2 KiB
Matlab
%% Skript zur Berechnung der Verluste der Gleichrichter-FETs
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%Datenblatt https://www.infineon.com/dgdl/Infineon-IPTC068N20NM6-DataSheet-v02_00-EN.pdf?fileId=8ac78c8c96250806019626da9150613e
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clear all
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close all
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fs = 100e3; %Switching frequency [Hz]
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n = 12; %Turns ratio
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V_DS_max = 600/n *2; %Maximum Drain-Source-Voltage [V]
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Is_rms = 1000/24; %Secondary RMS Current [A]
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R_DS = 6.8e-3; %Drain-Source-Resistance [Ohm]
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C_oss = 890e-12; %Output Capacitance [F]
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V_DS_meas = 100; %Drain-Source-Voltage during measurement of Coss [V]
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C_oss_avg = C_oss*sqrt(V_DS_meas/V_DS_max); %Average output capacitance [F]
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t_r = 15e-9; %Rise time [s]
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t_f = 9e-9; %Fall time [s]
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V_GS = 10; %Gate-Source-Voltage [V]
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Q_g = 71e-9; %Gate Charge Miller Plateau[C]
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%Calculate losses
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P_cond = power(Is_rms,2)*R_DS; %Conduction Losses [W]
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P_cap = 2*(Q_g*V_GS*fs/2 + V_DS_max*V_DS_max*C_oss_avg*fs/2); %Capacitive switching losses [W]
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P_sw = 1/2 * Is_rms * V_DS_max * fs * (t_r+t_f); %Switching loss [W]
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P_loss = 2*(P_cond+P_cap+P_sw); %Losses of the rectifier [W]
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