A low noise new switching scheme inverter with simple voltage control function

As progressing information technology, continuous running systems are as usual. For these systems, power supplies are also running continuously. One type power converter constitution is that AC power source is rectified to DC and then converted to AC to stabilize output voltage. To generate AC voltage, pulse width modulation (PWM) scheme is generally used. But this method raises large switching noise peaks at the multiple numbers of carrier frequency, and this is undesirable. On the other hand, these power converter systems often use isolation transformer, but this leads to heavy and large power supplies. In order to reduce noise level, this paper proposes a new switching control method. The control method is introduced to a nonisolated power inverter, which can achieve lightweight power supply. And it is also clarified that the proposed scheme has output voltage control function without PI control gains.