Test the model to supply for the DC load.

After the PVA model is built successfully, we can use it as a generator to supply power to a simple DC load. Today we were tried to design the dc load circuit and connect it to the PVA model. The designed circuit is shown below:

At the beginning, when we tested this circuit, the result is terrible and we can’t get stable output and the curves we obtained changed too much. They were far away from what we expected. Then we discussed this problem with our supervisor Dr Tang. After that, we found that the problem may caused by the wrong design in the filter so the next work we should do is to improve the design in filter.

In the above figure, it can be seen that in front of the filter, there is a diode.  It also has a little affect on the output voltage so we designed a circuit to test the output of this diode. The circuit is shown below:

When we simulated this design, the following figure can be obtained.

In the figure, it can be seen that at the beginning the voltage in diode increase fast and then it remains stable and to be 0.8 voltage. Thus at the dc load, the voltage should decrease fast at the beginning and then immediately the voltage reaches at a stable state. The initial value of the current is assigned to 0. In this case, the voltage has its maximum value.