Industrial Electronics
Keyvan Yari; Sara Hasanpour
Abstract
This paper presents a new high step-up DC-DC switched-mode converter in which not only the input and output ports can be connected to a common ground, but also the service time of the input source is extended due to continuous current injection to the proposed power converter. Furthermore, the fast dynamic ...
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This paper presents a new high step-up DC-DC switched-mode converter in which not only the input and output ports can be connected to a common ground, but also the service time of the input source is extended due to continuous current injection to the proposed power converter. Furthermore, the fast dynamic response is offered by minimum phase characteristics. This key feature is achieved by making the proposed converter’s control to output transfer function, free from the right half plane zero (RHPZ). Full description of the operation principles, theoretical analysis related to steady-state operation, and also the small-signal modelling derivation of the proposed converter, are presented in this paper. In the end, to confirm all the merits of the proposed converter and accuracy of theoretical analysis, a sample 25 V - 100 V laboratory prototype DC-DC converter with 100W output power has been implemented, and the main experimental results have also been outlined.
Industrial Electronics
Nasim Bagheri; Hasan Alipour; Leila Mohammadian; Jamal Beiza; Mohsen Ebadpour
Abstract
This paper proposes an integrated bidirectional multiport DC-DC converter for battery charging of plug-in electric vehicles, which is able to integrate the photovoltaic (PV) system, traction batteries, and the AC grid. The presented converter is more reliable than the conventional topologies because ...
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This paper proposes an integrated bidirectional multiport DC-DC converter for battery charging of plug-in electric vehicles, which is able to integrate the photovoltaic (PV) system, traction batteries, and the AC grid. The presented converter is more reliable than the conventional topologies because both PV panels and the grid can simultaneously or separately deliver power to the high voltage batteries. In addition, the topology is bidirectional can transfer power from batteries to the AC grid by employing half-bridge CLLC converter with fewer switches. Moreover, a unified controller along with optimum maximum power point tracking (MPPT) algorithm is utilized for control of the converter. The converter topology, control system, and operating scenarios are analyzed by using state space modeling. To evaluate the whole system performance, MATLAB/Simulink software is used to test the converter’s operation during different conditions. The simulation results depict that the proposed converter is not only able to control the batteries charge and discharge according to the state of the charge, but also maintain the DC-link voltage of the grid side to be in constant level.
Industrial Electronics
Mahmoodreza Eskandarpour Azizkandi; Farzad Sedaghati; Hossein Shayeghi
Abstract
A new non-isolated, coupled-inductor, single-switch boost DC-DC converter for photovoltaic (PV) power application is introduced in this paper. A coupled inductor and voltage multiplier cells is used in the presented converter to obtain a high voltage conversion ratio. Also, a passive clamp circuit is ...
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A new non-isolated, coupled-inductor, single-switch boost DC-DC converter for photovoltaic (PV) power application is introduced in this paper. A coupled inductor and voltage multiplier cells is used in the presented converter to obtain a high voltage conversion ratio. Also, a passive clamp circuit is applied in the converter structure to reduce voltage stress of the power switch. This leads to using a power switch with lower on-state resistance in the converter which decreases the conduction loss. In addition, zero current switching (ZCS) condition for the power switch is achieved due to the use of the clamp circuit. Several advantages such as low operating duty cycle, high voltage conversion ratio, reduced voltage stress of semiconductors, low turn ratio for the coupled inductor, leakage inductance reverse recovery and high efficiency operation make the presented converter suitable for renewable energy applications. The steady state operation of the suggested structure in continuous conduction mode (CCM) and discontinuous conduction mode (DCM) is expressed and analyzed. Then, the presented topology is compared with several similar high gain topologies to prove its advantages. Finally, experimental measurement results of a laboratory prototype of the proposed DC-DC converter with about 213W output power and 435V output voltage at 50 kHz switching frequency are presented to corroborate its feasibility and performance.
Industrial Electronics
mohammad hosein ershadi; shahrokh shojaeian; reza keramat
Abstract
In this paper, the Brain Emotional Learning Based Intelligent Controller (BELBIC) and fuzzy controller were used to control output voltage of the full bridge DC-DC converter. The converter is presented by its state space averaged model assuming that it operates in the continuous conduction mode (CCM). ...
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In this paper, the Brain Emotional Learning Based Intelligent Controller (BELBIC) and fuzzy controller were used to control output voltage of the full bridge DC-DC converter. The converter is presented by its state space averaged model assuming that it operates in the continuous conduction mode (CCM). A comparison was also made between the results. The effectiveness of control approaches are demonstrated by the uncertainty of system parameters and acceptable load variations. The performance of the BEBLIC and fuzzy controller in controlling the output voltage of the full bridge DC-DC converter was satisfactory. Since these controllers are not designed to reduce error to zero, it is not possible to claim that the error rate is precisely zero. Compared to the fuzzy controller, the BELBIC shows negligible overshoots and fluctuations. Both controllers reach stabilization almost at once. It is, therefore, concluded that the BELBIC acts better than the fuzzy controller. Considering the uncertainty of system parameters (including inductance, capacitance, and input voltage and acceptable variations of load), BELBIC acts better than the fuzzy controller.
