## 1 Introduction
Applications such as line voltage correction having a high depth level or high-voltage-gain AC-to-DC converters need a high bipolar voltage gain. The required features of the voltage gain can be obtained with the realization of voltage boost voltage controllers, which are capable of non-inverting or inverting the input voltage at the output with voltage-regulated characteristics. One of the latest AC voltage controllers having bipolar voltage boost features is employed in [20], as can be viewed in Figure 5.  
However, its realization requires the use of six switching transistors and eight diodes. The overall size and cost of any AC voltage controller are directly affected by the use of a number of switching transistors. The switching of one transistor requires the use of one gate-controlling circuit (GCC) with a separate isolated DC source (IDS). The size and cost of a GCC and IDS are much larger than those of a transistor or power converter circuit. The similar existing topologies use a large number of switching transistors (and associated circuits that deal with their turn-on and turn-off control) and diodes, which are the major sources of the increased overall volume, losses, and costs. Therefore, in this article, a new boost voltage controller having bipolar voltage boost features is proposed that is realized with the use of six diodes and four switching transistors. Therefore, eliminating the number of switching transistors drastically reduces the overall size and cost of the converter. This circuit topology also helps to simplify the switching arrangements, and it also avoids the problems caused by the shoot-through. There is no possibility of interruption of the inductor current that may result from some inherent delay or defect in the operation of the switching transistors. For this purpose, an inductor is connected at the intermediate level to avoid paralleling the input and output capacitors or the shorting of the input or output capacitors. In the same way, the series connection of diode \(D_{5}\) with transistor \(Q_{4}\) and diode \(D_{6}\) with transistor \(Q_{2}\) helps to tackle the current interruption of the inductor current, which may otherwise lead to the generation of high inductive voltage kicks. With this approach, the transistor \(Q_{2}\) is ensured to be on for the positive input voltage once the transistor \(Q_{4}\) operates with high-frequency PWM control. Figure 4: A direct approach of voltage compensation. Figure 3: (**a**) Voltage compensation through interphase connection; (**b**) interconnection of AC-AC converters. Once the transistor \(Q_{4}\) is on, the transistor \(Q_{2}\) is also on, but it is in the non-conducting state as its series-connected diode is reverse-biased. This diode changes its state from off to on as transistor \(Q_{4}\) turns off. Thus, the inductor current remains uninterrupted for the PWM switching control for the transistor \(Q_{4}\). This is also true for the PWM switching control of the transistor \(Q_{2}\) as well. The section-wise arrangement of this research article includes the demonstration of all operating modes in Section 2 with the help of power transfer loops and control signals. The effectiveness of the proposed circuit is proven in Section 3 through a comparison with topologies realized with similar strategies. The operational validation of the suggested circuit is carried out in Section 4 with the comparison of results gained from computer software and a practical model. The conclusions are presented in Section 5.