Abstract
In a current source rectifier such as a matrix rectifier, input voltage and current cannot be in phase unless an additional input power factor control technique is implemented. This paper proposes such a technique for a matrix rectifier using power-based space vector modulation (SVM). In the proposed method, the modulation index and phase required in order to apply the SVM are calculated based on the active and reactive power of the rectifier for intuitive power factor control. The active power that the rectifier should generate for the regulation of the output inductor current is obtained by the PI (proportional-integral) controller. The reactive power, which is supplied by the rectifier for adjustment of the power factor, is assigned differently depending on the output condition: for the output condition capable of unity power factor, it is set to a negative value of reactive power of the input capacitor, and when the unity power factor is not achievable, it is set with the maximum reactive power the rectifier can generate under the given condition to attain the maximum possible input power factor. It is determined whether the given condition is the light load condition by comparing the absolute value of the reactive power supplied by the input capacitor with the maximum rectifier reactive power that can be produced under the given condition. The SVM based on the active and reactive power of the rectifier in this technique allows the input power factor control to be intuitive and simple. The performance and feasibility of the technique were proved by simulation and experimentation.
Highlights
When the charger of an electric vehicle is manufactured with a voltage source rectifier with a boost type characteristic, an additional DC-to-DC converter is needed
This paper proposes a power factor adjustment technique for a matrix rectifier using a power-based space vector modulation (SVM)
A simulation was carried out to confirm the performance of the proposed technique and to verify the power factor control performance by comparing the conventional SVM described in Figure 3 with the proposed scheme
Summary
When the charger of an electric vehicle is manufactured with a voltage source rectifier with a boost type characteristic, an additional DC-to-DC converter is needed. This DC-to-DC converter drops the voltage, because the battery voltage used in an electric vehicle is lower than the grid voltage [1,2,3,4,5]. The matrix rectifier is a type of current source rectifier that uses DC current flow in the output inductor to produce a pulse wave of the same size as the output inductor current at the rectifier input [13]. The current source rectifier controls the phase of the Electronics 2019, 8, 1427; doi:10.3390/electronics8121427 www.mdpi.com/journal/electronics
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
