Efficiency optimization for bidirectional IPT system

Nguyen, Bac Xuan; Foo, Gilbert; Ong, Alex; Vilathgamuwa, D.M.; Madawala, Udaya K.

doi:10.1109/itec.2014.6861796

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…It is also important to note that when comparing the energy losses between the various load resistances, the same current limit i 1−ON will result in a different k min . In addition, as suggested in [21], the WPT system's efficiency is dependent on the load resistance, which explains the increasing energy loss that comes along with the increasing load resistance. In addition, (11) clearly shows the proportionality between pulse frequency and power loss.…”

Section: Power and Energy Lossmentioning

confidence: 96%

Transmitter Pulsation Control for Dynamic Wireless Power Transfer Systems

Ong

Jayathurathnage

Cheong

et al. 2017

IEEE Trans. Transp. Electrific.

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Wireless power transfer (WPT) is a convenient, flexible, and safe alternative to its wired counterpart. Due to these benefits, WPT has seen rapid growth in recent years. Typical WPT systems are usually used for static applications, where the load operates within a predefined area. On the other hand, dynamic WPT (D-WPT) is usually used to power loads which dynamically change their positions, and one of the ways to achieve this is by increasing the overall charging area via multiple transmitters (Txs). Multiple Txs require communication and control, which increases the overall complexity of the system. This paper proposes a control algorithm which aims to maintain the overall efficiency of the D-WPT system by turning on and off the Tx when the mobile receiver (Rx) approaches and departs, respectively. Transient analysis of the D-WPT system is used to derive its control variables. In addition, energy and power loss of this proposed control algorithm are also investigated. The feasibility of the proposed control algorithm is demonstrated with 1-Tx and 3-Tx experimental setups. The experimental results validate the theoretical analysis model and the proposed control algorithm, and the standby (when not charging) input power forms 7.6% of the charging input power.

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Section: Power and Energy Lossmentioning

confidence: 96%

Transmitter Pulsation Control for Dynamic Wireless Power Transfer Systems

Ong

Jayathurathnage

Cheong

et al. 2017

IEEE Trans. Transp. Electrific.

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“…The relationship between the output voltages can be determined by the maximum transmission efficiency. The loss is minimized by using appropriate output voltage ratios [100,101].…”

Section: B Control Strategymentioning

confidence: 99%

Advances in inductively coupled power transfer technology for rail transit

Shi

Yin

Jiang

et al. 2017

Trans. Electr. Mach. Syst.

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Traditional power supply method for moving electric railway vehicles is based on contact type power collection technology. This sometimes cannot meet the requirements of modern rail transportation. A new wireless power transfer (WPT) technology can offer significant benefits in modern rail transportation particularly in some stringent environments. This paper reviews the status and the development of rail transit power supply technology, and introduces a new challenging technology-inductive power transfer (IPT) technology for rail transit. Tesla established the underpinning of IPT technology and creatively and significantly demonstrated power transfer by using highly resonant tuned coils long time ago. However, only in recent years the IPT technology has been significantly improved including the transfer air-gap length, transfer efficiency, coupling factor, power transfer capability and so on. This is mainly due to innovative semiconductor switches, higher control frequency, better coil designs and high performance material, new track and vehicle construction techniques. Recent advances in IPT for rail transit and major milestones of the developments are summarized in this paper. Some important technical issues such as coupling coil structures, power supply schemes, segmentation switching techniques for long-distance power supply, and bidirectional IPT systems for braking energy feedback are discussed. Index Terms-Bidirectional energy transfer, inductive power transfer (IPT), magnetic coupling, rail transit, segmented power supply, wireless power transfer (WPT).

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“…Therefore, research on power converters used in high power IPT systems becomes an important issue. Towards the aim of increasing power scalability and the overall efficiency, several attempts have been made in terms of using multiphase IPT systems [1] - [3], multi-input/multi-pickup IPT systems [4], multilevel converter (MC) topologies [5] - [7] and optimizing the efficiency [15] - [16].…”

Section: Introductionmentioning

confidence: 99%

A multilevel converter topology based bidirectional inductive power transfer system with improved characteristics

Nguyen

Vilathgamuwa

Foo

et al. 2015

2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)

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LCL network is one of the best choices for compensating bidirectional inductive power transfer (BIPT) systems. However, H -Bridge power converter of the conventional BIPT systems generates highly distorted AC current which results in reduced overall system efficiency particularly in high power BIPT systems. In order to overcome this drawback, a multilevel converter (MC) with selective harmonic distortion (SHE) modulation method is presented in this paper to eliminate high order harmonic components in converter voltages at both sides of BIPT systems. The proposed MC topology is constructed using a modified H -Bridge converter with minimum number of power switches. The proposed topology is suitable for low to medium power applications. The simulation results demonstrate the feasibility of the proposed scheme.

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Efficiency optimization for bidirectional IPT system

Cited by 5 publications

References 16 publications

Transmitter Pulsation Control for Dynamic Wireless Power Transfer Systems

Transmitter Pulsation Control for Dynamic Wireless Power Transfer Systems

Advances in inductively coupled power transfer technology for rail transit

A multilevel converter topology based bidirectional inductive power transfer system with improved characteristics

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