## 5 Conclusions  
The construction of three-phase modular rectifiers (three modules) with boost converters and power factor correction presents a problem of current interaction, when the rectifier modules are connected in parallel and without filters at the input or output. Some techniques to avoid interactions are found in the literature, but they still have some problems such as increased volume, weight, and saturation and construction complexity. To eliminate the current interaction, it is proposed to introduce the differential-mode choke filter (DMCF) in each module of the three-phase modular rectifier in order to obtain an isolation between the phases, because the DMCF maintains the impedance value where the normal current travels and increases the impedance in the path of the current interaction.  
The methodology of connecting the power circuit to the control circuit through the interface circuit seems feasible, as it allows the isolation between the two circuits (power and control).  
According to the results, obtained from the proposed rectifier through simulation in PSIM and through an experimental prototype, there is shown the possibility of mitigating current interactions. This possibility guarantees the correction of the power factor value and guarantees a low total harmonic distortion that meets the recommendations of international standards. Although the prototype is still in the testing phase, the first results already obtained and presented, jointly with the results from its simulation, demonstrate the operation of the presented innovation. Thus, the proposed rectifier, with the insertion of the DMCF into the modular three-phase rectifiers with boost converter and CFP, is functional and applicable.  
The results are considered preliminary and need better validation, as described below, in future works.  
Future WorksTo continue the study of the modular three-phase rectifier proposed in this work, it is recommended to build a prototype and apply digital control.  
Figure 18: Voltage and current at the rectifier output.  
Prototype: In this work, the results are considered preliminary, due to the simulation procedure that was used for validation and the first results of the prototype test. To improve the validation of the DMCF in a modular three-phase rectifier with boost converter, it is recommended to build 10 or 20 kW prototypes to be applied in wind systems or in aeronautics and spacecrafts.  
Digital control: In this work, analog control was applied using the UC3854B integrated circuit. This type of control has some technical disadvantages. Since digital electronics has shown great gains in terms of application of control in converters, it is recommended to apply a digital control in the rectifier proposed. An example of integrated circuits with digital control that can be applied is the XMC1402-Q040 \(\times\) 0128 AA. In this way, the analog control (UC3854B) can be compared with the digital control used.  
Creation and development of the proposed circuit: J.T.G.; analysis and validation of the proposed circuit and proofreading: S.V.; analysis, validation, and proofreading: R.M. The other parameters were made by the authors in a mutual way. All authors have read and agreed to the published version of the manuscript.  
This research received no external funding.  
Not applicable.  
Poruguese Foundation for Science and Technology and CTS, project UIDB/00066/2020; Foundation for Science and Technology (FCT) under the LAETA project UIDB/50022/2020; Foundation for Science and Technology (FCT) under the ICT (Institute of Earth Sciences) project UIDB/04683/2020.  
The authors declare no conflict of interest.