Three-Phase Bridge Type All Control of Rectifying Sequence Phase Automatic Identification

At present in all kinds of rectifying circuit, one of the most widely applied is rectified three-phase bridge type all control circuit. In order to obtain the correct phase shifting control, the traditional thyristor rectifier system requires three synchronous transformers to get trigger synchronous pulse signal. Not only increased the cost of the system, at the same time, bring inconvenience to installation debugging. In order to solve this problem design synchronous signal circuit form 2 road phase30° synchronous signal, and design a sequence phase to calculate the algorithm can calculate effective signal, the main loop synchronous sequence and the synchronization signal zero is located in the main loop line voltage which the natural commutation points. Given the traditional phased rectifier modification key algorithms.