matlab第四章(改).ppt

* * * * * * * * * * * * * * * 导通角=30度 * 门槛电压； 阴极、阳机。 * 门槛电压； 阴极、阳机。 * * * * * * * * * * * * * 门槛电压； 阴极、阳机。 * 门槛电压； 阴极、阳机。 * * * * * * * * * * * * 4.5 DC Chopper and Simulation Simulations of Choppers – Buck Chopper 4.5 DC Chopper and Simulation Simulations Results 4.5 DC Chopper and Simulation Simulations Results 4.5 DC Chopper and Simulation Simulations of Choppers – Boost-Buck Chopper 4.5 DC Chopper and Simulation Simulations Results 4.5 DC Chopper and Simulation Simulations Results Homework Recreate one or more above simulation models. Try to modified some parameters of these models. Re-simulate the modified models and observe the results. * * * 门槛电压； 阴极、阳机。 * * * * * * * 门槛电压； 阴极、阳机。 * * * * * * * 门槛电压； 阴极、阳机。 * * * * 门槛电压； 阴极、阳机。 * 门槛电压； 阴极、阳机。 * * * 4.2 Rectifier and Simulation 4.2.2 Three Phase Rectifier Simulation Model 4.2 Rectifier and Simulation Rectifier in Simulink— Universal Bridge The Universal Bridge block implements a universal three-phase power converter that consists of up to six power switches connected in a bridge configuration. It is the basic block for building two-level voltage-sourced converters (VSC). The type of power switch and converter configuration are selectable from the dialog box. Diodes and thyristors are naturally commutated power electronic devices, GTOs, IGBT and MOSFETs forced-commutated devices . 4.2 Rectifier and Simulation Parameter Configuration Number of bridge arm： 桥臂数 Snubber resistance Rs： 缓冲电阻 Snubber capacitance Cs：缓冲电容 Power Electronic device：器件 Ron： 内阻 Lon ：内感 Forward voltage Vf: 正向管压降 4.2 Rectifier and Simulation Rectifier in Simulink— Universal Bridge 4.2 Rectifier and Simulation Rectifier in Simulink— Universal Bridge 4.2 Rectifier and Simulation How to specify the Rs and Cs snubber values? In order to avoid numerical oscillations when your system is discretized, Rs and Cs snubber values need be specified for diode and thyristor bridges. If firing pulses to forced-com