![clipping detector circuit limitations clipping detector circuit limitations](http://www.seekic.com/uploadfile/ic-circuit/s201332944156297.jpg)
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A robust but straightforward algorithm has been proposed here using a digital zero-crossing detector (ZCD) circuit. Phase synchronization and frequency tracking are essential part of control unit design for the grid -tie power converter of the efficient energy conversion system. While tested with two types of microcontrollers the precision of experimental measurement is 25 μs - 40 μs. It takes all advantages from both approaches. In this paper a simple low cost high precision approach is presented.
#CLIPPING DETECTOR CIRCUIT LIMITATIONS SOFTWARE#
Software approach has high precision but it is complicated and expensive. Hardware approach is simple but it has low precision.
![clipping detector circuit limitations clipping detector circuit limitations](https://www.bakatronics.com/images/FK940b.jpg)
Different approaches are used for zero crossing: hardware or software. They consist of current or voltage measurement unit and zero crossing detector. Zero crossing sensors are used to solve this problem. Power electronics converters presented in industry use two or three level energy conversion, although direct AC to AC converters exist, but one of the main problems is the switch commutation when current or voltage is crossing the zero point. For them power electronics converters are necessary. Some of them like small hydropower turbines, wind turbines and diesel generators produce AC voltage with different frequency and voltage than the main grid. Renewable energy sources and energy storage devices are becoming more popular.