Mohammad Reza Mohammadi | Isfahan University of Technology (original) (raw)
Papers by Mohammad Reza Mohammadi
IEEE Transactions on Industrial Electronics, Sep 1, 2017
Iranian Conference on Electrical Engineering, May 17, 2011
... Ali Ghasemi , Student Member IEEE *, Ehsan Adib, Member IEEE **, and Mohammad Reza Mohammadi ... more ... Ali Ghasemi , Student Member IEEE *, Ehsan Adib, Member IEEE **, and Mohammad Reza Mohammadi ... University of Technology, a.ghasemi@ec.iut.ac.ir **Department of electrical and computer engineering, Isfahan University of Technology, e.adib@cc.iut ... [5] EH Ismail, MA Al ...
IEEE Transactions on Industrial Electronics, Oct 1, 2020
IEEE Transactions on Industrial Electronics, Mar 1, 2015
IEEE Transactions on Industrial Electronics, Feb 1, 2012
IEEE Transactions on Industrial Electronics, Mar 1, 2016
ABSTRACT A bidirectional ZVT buck and boost converter with coupled inductors is proposed in this ... more ABSTRACT A bidirectional ZVT buck and boost converter with coupled inductors is proposed in this paper. In this converter a coupled inductor is used to reset the auxiliary circuit current to zero, in order to ensure soft switching of the auxiliary switches at turn off. All switches in the proposed converter are soft switched and thus high efficiency is achieved. The principle of operation is explained and analyzed. The simulation results justify the converter analysis.
Iet Power Electronics, Nov 1, 2012
Iet Renewable Power Generation, Oct 17, 2022
Abstract In this paper, a bidirectional Cuk converter with active clamp is introduced. The bidire... more Abstract In this paper, a bidirectional Cuk converter with active clamp is introduced. The bidirectional Cuk converter has the advantage of low ripple in input and output currents in addition to the ability of reversing the direction of current flow. By applying a simple ...
IET Power Electronics, 2012
IEEE Transactions on Industrial Electronics, 2019
Journal of Power Electronics, 2016
IEEE Transactions on Industrial Electronics, 2016
IEEE Transactions on Industrial Electronics, 2015
IEEE Transactions on Industrial Electronics, 2012
… Engineering (ICEE), 2011 …, 2011
... Ali Ghasemi , Student Member IEEE *, Ehsan Adib, Member IEEE **, and Mohammad Reza Mohammadi ... more ... Ali Ghasemi , Student Member IEEE *, Ehsan Adib, Member IEEE **, and Mohammad Reza Mohammadi ... University of Technology, a.ghasemi@ec.iut.ac.ir **Department of electrical and computer engineering, Isfahan University of Technology, e.adib@cc.iut ... [5] EH Ismail, MA Al ...
IEEE Transactions on Industrial Electronics, 2017
Abstract—This paper proposes a family of soft switching bidirectional converters. In many applic... more Abstract—This paper proposes a family of soft switching bidirectional converters. In many applications, the bidirectional converters operate over a wide range of duty-cycle and load variations. In the proposed converters, in order to extend the ZVS operation range, two supplemental voltage sources utilizing passive components are implemented in the auxiliary circuit. By using this method, the soft switching features are ensured for an extensive range of the converter duty-cycles. This is achieved independent of the output power value or the converter operation mode and so, soft switching is ensured within the entire converter operating region. In these converters, all semiconductors components are soft switched, and the auxiliary circuit does not contribute to the complexity of the control circuit. Also, no extra voltage stress exists on the main switches and the voltage stress on the auxiliary switches is lower than the main switches voltage stress. In this paper, the proposed bidirectional buck/boost converter is analyzed and to confirm the feasibility of the proposed method, experimental results of a 150-W prototype converter are presented. Index Terms—Pulse width modulation (PWM) dc-dc converters, Bidirectional dc–dc converter (BDC), soft-switching techniques, zero-voltage switching (ZVS), zero-voltage switching (ZVT).
In this paper, a new family of zero-voltage-transition bidirectional converters are introduced. I... more In this paper, a new family of zero-voltage-transition bidirectional converters are introduced. In the proposed converters, soft switching condition for all semiconductor elements is provided regardless of the power flow direction and without any extra voltage and current stress on the main switches. The auxiliary circuit is composed of a coupled inductor with the converter main inductor and two auxiliary switches. The auxiliary switches benefit from significantly reduced voltage stress and without requiring floating gate drive circuit. Also, by applying the synchronous rectification to the auxiliary switches body diodes, conduction losses of the auxiliary circuit is reduced. In the auxiliary circuit, the leakage inductor is used as the resonant inductor and all the magnetic components are implemented on a single core which has resulted in significant reduction of the converter volume. In the proposed converters, the reverse recovery losses of the converter rectifying diodes are completely eliminated and hence, using the low-speed body diode of the power switch as the converter rectifying diode is feasible. The theoretical analysis for a bidirectional buck and boost converter is presented in details and the validity of the theoretical analysis is justified using the experimental results of a 250W prototype converter.
IEEE Transactions on Industrial Electronics, 2015
In this paper, a prevalent type of zero-voltage- transition bidirectional converters is analyzed ... more In this paper, a prevalent type of zero-voltage- transition bidirectional converters is analyzed with the in- clusion of the reverse recovery effect of the diodes. The main drawback of this type is missing the soft-switching condition of the main switches at operating duty cycles smaller than 0.5. As a result, soft-switching conditionwould be lost in one of the bidirectional converter operating modes (forward or reverse modes) since the duty cycles of the forward and reverse modes are complement of each other. Analysis shows that the rectifying diode reverse recovery would assist in providing the soft-switching con- dition for the duty cycles below 0.5, which is done by a proper design of the snubber capacitor and with no limitation on the rectifying diode current rate at turn-off. Hence, the problems associated with the soft-switching range and the reverse recovery of the rectifying diode are solved simultaneously, and soft-switching condition for both operating modes of the bidirectional converter is achieved with no extra auxiliary components and no complex control. The theoretical analysis for a bidirectional buck and boost converter is presented in detail, and the validity of the theoretical analysis is justified using the experimental results of a 250-W 135- to 200-V prototype converter.
IEEE Transactions on Industrial Electronics, Sep 1, 2017
Iranian Conference on Electrical Engineering, May 17, 2011
... Ali Ghasemi , Student Member IEEE *, Ehsan Adib, Member IEEE **, and Mohammad Reza Mohammadi ... more ... Ali Ghasemi , Student Member IEEE *, Ehsan Adib, Member IEEE **, and Mohammad Reza Mohammadi ... University of Technology, a.ghasemi@ec.iut.ac.ir **Department of electrical and computer engineering, Isfahan University of Technology, e.adib@cc.iut ... [5] EH Ismail, MA Al ...
IEEE Transactions on Industrial Electronics, Oct 1, 2020
IEEE Transactions on Industrial Electronics, Mar 1, 2015
IEEE Transactions on Industrial Electronics, Feb 1, 2012
IEEE Transactions on Industrial Electronics, Mar 1, 2016
ABSTRACT A bidirectional ZVT buck and boost converter with coupled inductors is proposed in this ... more ABSTRACT A bidirectional ZVT buck and boost converter with coupled inductors is proposed in this paper. In this converter a coupled inductor is used to reset the auxiliary circuit current to zero, in order to ensure soft switching of the auxiliary switches at turn off. All switches in the proposed converter are soft switched and thus high efficiency is achieved. The principle of operation is explained and analyzed. The simulation results justify the converter analysis.
Iet Power Electronics, Nov 1, 2012
Iet Renewable Power Generation, Oct 17, 2022
Abstract In this paper, a bidirectional Cuk converter with active clamp is introduced. The bidire... more Abstract In this paper, a bidirectional Cuk converter with active clamp is introduced. The bidirectional Cuk converter has the advantage of low ripple in input and output currents in addition to the ability of reversing the direction of current flow. By applying a simple ...
IET Power Electronics, 2012
IEEE Transactions on Industrial Electronics, 2019
Journal of Power Electronics, 2016
IEEE Transactions on Industrial Electronics, 2016
IEEE Transactions on Industrial Electronics, 2015
IEEE Transactions on Industrial Electronics, 2012
… Engineering (ICEE), 2011 …, 2011
... Ali Ghasemi , Student Member IEEE *, Ehsan Adib, Member IEEE **, and Mohammad Reza Mohammadi ... more ... Ali Ghasemi , Student Member IEEE *, Ehsan Adib, Member IEEE **, and Mohammad Reza Mohammadi ... University of Technology, a.ghasemi@ec.iut.ac.ir **Department of electrical and computer engineering, Isfahan University of Technology, e.adib@cc.iut ... [5] EH Ismail, MA Al ...
IEEE Transactions on Industrial Electronics, 2017
Abstract—This paper proposes a family of soft switching bidirectional converters. In many applic... more Abstract—This paper proposes a family of soft switching bidirectional converters. In many applications, the bidirectional converters operate over a wide range of duty-cycle and load variations. In the proposed converters, in order to extend the ZVS operation range, two supplemental voltage sources utilizing passive components are implemented in the auxiliary circuit. By using this method, the soft switching features are ensured for an extensive range of the converter duty-cycles. This is achieved independent of the output power value or the converter operation mode and so, soft switching is ensured within the entire converter operating region. In these converters, all semiconductors components are soft switched, and the auxiliary circuit does not contribute to the complexity of the control circuit. Also, no extra voltage stress exists on the main switches and the voltage stress on the auxiliary switches is lower than the main switches voltage stress. In this paper, the proposed bidirectional buck/boost converter is analyzed and to confirm the feasibility of the proposed method, experimental results of a 150-W prototype converter are presented. Index Terms—Pulse width modulation (PWM) dc-dc converters, Bidirectional dc–dc converter (BDC), soft-switching techniques, zero-voltage switching (ZVS), zero-voltage switching (ZVT).
In this paper, a new family of zero-voltage-transition bidirectional converters are introduced. I... more In this paper, a new family of zero-voltage-transition bidirectional converters are introduced. In the proposed converters, soft switching condition for all semiconductor elements is provided regardless of the power flow direction and without any extra voltage and current stress on the main switches. The auxiliary circuit is composed of a coupled inductor with the converter main inductor and two auxiliary switches. The auxiliary switches benefit from significantly reduced voltage stress and without requiring floating gate drive circuit. Also, by applying the synchronous rectification to the auxiliary switches body diodes, conduction losses of the auxiliary circuit is reduced. In the auxiliary circuit, the leakage inductor is used as the resonant inductor and all the magnetic components are implemented on a single core which has resulted in significant reduction of the converter volume. In the proposed converters, the reverse recovery losses of the converter rectifying diodes are completely eliminated and hence, using the low-speed body diode of the power switch as the converter rectifying diode is feasible. The theoretical analysis for a bidirectional buck and boost converter is presented in details and the validity of the theoretical analysis is justified using the experimental results of a 250W prototype converter.
IEEE Transactions on Industrial Electronics, 2015
In this paper, a prevalent type of zero-voltage- transition bidirectional converters is analyzed ... more In this paper, a prevalent type of zero-voltage- transition bidirectional converters is analyzed with the in- clusion of the reverse recovery effect of the diodes. The main drawback of this type is missing the soft-switching condition of the main switches at operating duty cycles smaller than 0.5. As a result, soft-switching conditionwould be lost in one of the bidirectional converter operating modes (forward or reverse modes) since the duty cycles of the forward and reverse modes are complement of each other. Analysis shows that the rectifying diode reverse recovery would assist in providing the soft-switching con- dition for the duty cycles below 0.5, which is done by a proper design of the snubber capacitor and with no limitation on the rectifying diode current rate at turn-off. Hence, the problems associated with the soft-switching range and the reverse recovery of the rectifying diode are solved simultaneously, and soft-switching condition for both operating modes of the bidirectional converter is achieved with no extra auxiliary components and no complex control. The theoretical analysis for a bidirectional buck and boost converter is presented in detail, and the validity of the theoretical analysis is justified using the experimental results of a 250-W 135- to 200-V prototype converter.