Flying-Capacitor-Based Chopper Circuit for DC Capacitor Voltage Balancing in Diode-Clamped Multilevel Inverter

Shukla, Anshuman; Ghosh, Arindam; Joshi, Avinash

doi:10.1109/tie.2009.2029527

Cited by 84 publications

(44 citation statements)

References 41 publications

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“…The topology was simple and easy to control. Different battery balancing circuit topologies are reported depending on the energy storage component, such as a novel voltage equalizer based on the two-phase switched capacitor technique [15], single switched capacitor (SSC) cell balancing [16], an equalization system based on a quasi-resonant switched-capacitor converter [17] and a flying-capacitor-based chopper circuit for DC capacitor voltage equalization in diode-clamped multilevel inverters [18]. Topologies based on transformers are also widely discussed due to their high balancing current and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Battery Equalization by Fly-Back Transformers with Inductance, Capacitance and Diode Absorbing Circuits

Liu

Sun

et al. 2017

Energies

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Battery equalization can increase batteries' life cycle, utilization, and reliability. Compared with battery equalization topologies based on resistance or energy storage components, the topologies based on transformers have the advantages of high balancing current and efficiency. However, the existence of switching losses will reduce the reliability and service life span of the equalization circuit. Aiming at resolving this problem, a new battery equalization topology by fly-back transformer with an absorbing circuit is proposed in this paper. Compared with other transformer-based topologies, it can decrease switching losses because the voltage/current spike is solved by the absorbing circuit which is composed of inductance, capacitance and diode (LCD), and it can also maintain a high balancing current of about 1.8 A and high efficiency of about 89%, while the balancing current and efficiency of other topologies were usually 1.725 A/1.5 A and 80%/80.4%. The working principle of the balancing topology and the process of soft switching are analyzed and calculated in the frequency domain. Due to the addition of the LCD absorbing circuit, soft switching can be realized to reduce the switching losses while the high equalization speed and efficiency are still maintained. The corresponding control strategy of the balancing topology is also proposed and the timely balancing is achieved. The theoretical analysis is verified by simulation and experimental results.

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Section: Introductionmentioning

confidence: 99%

Battery Equalization by Fly-Back Transformers with Inductance, Capacitance and Diode Absorbing Circuits

Liu

Sun

et al. 2017

Energies

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“…However, DCMLI suffers from voltage unbalance if the voltage levels exceed three, then all the aforementioned advantages will disappear. Therefore, it is essential to keep the DC capacitor voltage balanced [16].…”

Section: Introductionmentioning

confidence: 99%

A New Diode-Clamped Multilevel Inverter for Capacitor Voltage Balancing

Shi¹,

Wang²,

Zheng³

et al. 2016

PIER M

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Abstract-In this paper, a new diode-clamped multilevel inverter for capacitor voltage with inserted inductors is proposed. The key is to solve the voltage unbalance of diode-clamped multilevel inverter (DCMLI), which utilizes fewer switches and adopts a simpler control strategy. In this way, the cost and volume of the DCMLI can be effectively reduced. Firstly, the new five-level inverter topology is analyzed in detail under different operation modes. Then, the proposed topology extended to (2n+1) level inverter is introduced and discussed. Finally, both simulation and experiment results are demonstrated to verify the validity of the proposed topology.

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“…Two filtering inductors L 1 and L 2 , which are in series, are connected to two switches S 1 and S 2 , which eliminates the problem of shooting-through [21], [23]- [25], [27]- [28]. Due to this, all of the switch combinations can be used without setting the dead-time and the reliability of the system increases.…”

Section: Introductionmentioning

confidence: 99%

“…Fast Recovery Diodes (FRDs) D 1 and D 2 take the place of the parasitic diode of switches S 1 and S 2 which overcomes shortcomings such as too large a reverse recovery current, too long a reverse recovery time, and too much loss of the parasitic diode [20], [21], [23]- [25], and [28]. In addition, the efficiency can be improved, the frequency can be increased, and the volume and weight of the model can be decreased.…”

Section: Introductionmentioning

confidence: 99%

A Novel Five-Level Flying-Capacitor Dual Buck Inverter

Liu¹,

Hong²,

Wang³

2016

Journal of Power Electronics

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This paper focuses on the development of a Five-Level Flying-Capacitor Dual Buck Inverter (FLFCDBI) based on the main circuit of dual buck inverters. This topology has been described as not having any shoot-through problems, no body-diode reverse recovery problems and the half-cycle work mode found in the traditional Multi-Level Flying-Capacitor Inverter (MLFCI). It has been shown that the flying-capacitor voltages of this inverter can be regulated by the redundant state selection within one pole. The voltage balance of the flying-capacitors can be achieved by charging or discharging in the positive (negative) half cycles by choosing the proper logical algorithms. This system has a simple structure but demonstrates improved performance and reliability. The validity of this inverter is conformed through computer-aided simulation and experimental investigations.

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Flying-Capacitor-Based Chopper Circuit for DC Capacitor Voltage Balancing in Diode-Clamped Multilevel Inverter

Cited by 84 publications

References 41 publications

Battery Equalization by Fly-Back Transformers with Inductance, Capacitance and Diode Absorbing Circuits

Battery Equalization by Fly-Back Transformers with Inductance, Capacitance and Diode Absorbing Circuits

A New Diode-Clamped Multilevel Inverter for Capacitor Voltage Balancing

A Novel Five-Level Flying-Capacitor Dual Buck Inverter

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