During my Ph.D. work, it was a requirement to sense the dc current on the PV side and ac current on the grid side. To sense the current I used a hall effect current sensor LTS25NP. This hall effect sensor is a bit costly however, it is excellent in working and easy to setup. Figure 1 shows this sensor. This sensor has three...
IR2111 is a half bridge driver that is extensively used in power electronics. It is an eight pin ic that works only with half bridge configuration. It can not be used individually for low side or high side driver. Here is the schematic that i designed during my term project. ...
4N26 and 4N37 are cheap optocoupler that are good for most of the power electronics applications. They are six pin ic with optical isolation. The output is inverted because the output transistor works as a switch. The frequency limit of this ic is explained in this post. The following is the working circuit of optocoupler 4N26 and 4N37. ...
The gate driver is essential in power electronics because of two basic reasons. First, at high frequency switching applications the switching time is less which means that in order to charge/discharge the mosfet capacitance fast, more current is required. The output current of most optocouplers is not enough to drive the mosfet properly. Secondly, most of the optocoupler output is limited to under...
Click to zoom Source : http://www.nrel.gov/ncpv/images/efficiency_chart.jpg ...
