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Aviation, train, subway lines and even shipping sectors have the largest share in the movement of passengers and cargo, which due to the importance and complexity of their control system is rapidly moving towards mechanized control and digitization, which in All digital and automatic control systems, AC & DC uninterruptible power supply play a very important role as a vital supplier of equipment electricity. In addition, in urban train lines where direct current power supply is used for propulsion, the Power Supply production company is able to cooperate in the field of electric wagons to supply their power by manufacturing 3 megawatts, 4000 amps and 750 volts rectifiers .