University of South Wales Master of Sciences Thesis
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- Điều hướng trang này:
- Inputs and Outputs
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Forward voltage Vf The forward voltage of the IGBT device, in volts (V). Current 10% fall time The current fall time Tf, in seconds (s). This parameter is not modeled when the Enable use of ideal switching devices parameter of the Powergui block is selected. Current tail time The current tail time Tt, in seconds (s). This parameter is not modeled when the Enable use of ideal switching devices parameter of the Powergui block is selected. Initial current Ic You can specify an initial current flowing in the IGBT. It is usually set to 0 in order to start the simulation with the device blocked. If the Initial Current IC parameter is set to a value greater than 0, the steady-state calculation considers the initial status of the IGBT as closed. Initializing all states of a power electronic converter is a complex task. Therefore, this option is useful only with simple circuits. Snubber resistance Rs The snubber resistance, in ohms (Ω). Set the Snubber resistance Rs parameter to inf to eliminate the snubber from the model. Snubber capacitance Cs The snubber capacitance in farads (F). Set the Snubber capacitance Cs parameter to 0 to eliminate the snubber, or to inf to get a resistive snubber. Show measurement port Inputs and Outputs g: Simulink signal to control the opening and closing of the IGBT. m: The Simulink output of the block is a vector containing two signals. You can demultiplex these signals by using the Bus Selector block provided in the Simulink library. IGBT Converter Standalone hybrid generation system for the remote area of Thar, Pakistan The model below illustrates the use of the IGBT block in a boost DC-DC converter. The IGBT is switched on and off at a frequency of 10 kHz to transfer energy from the DC source to the load (RC). The average output voltage (VR) is a function of the duty cycle (α) of the IGBT switch: In the model, α = 0.5 so that the theoretical value of VR is 200 V, assuming no voltage drop across the diode and the IGBT. |