High-Misalignment Tolerant Compensation Topology For ICPT Systems

Villa, Juan Luis; Sallán, J.; Sanz, J.F.; Llombart, A.

doi:10.1109/tie.2011.2161055

Cited by 411 publications

(203 citation statements)

References 19 publications

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“…Inductor 1 L is connected in series with the resonant network. 1 L is placed in the loop of the short current and will dampen any high di/dt ratio generated by a short current. Generally, the resonant network is resistant-inductive when f S is lower than f r .…”

Section: Mechanism Of Short Currentmentioning

confidence: 99%

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A Short-Current Control Method for Constant Frequency Current-Fed Wireless Power Transfer Systems

Duan

2017

Energies

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Abstract:Frequency drift is a serious problem in Current-Fed Wireless Power Transfer (WPT) systems. When the operating frequency is drifting from the inherent Zero Voltage Switching (ZVS) frequency of resonant network, large short currents will appear and damage the switches. In this paper, an inductance-dampening method is proposed to inhibit short currents and achieve constant-frequency operation. By adding a small auxiliary series inductance in the primary resonant network, short currents are greatly attenuated to a safe level. The operation principle and steady-state analysis of the system are provided. An overlapping time self-regulating circuit is designed to guarantee ZVS running. The range of auxiliary inductances is discussed and its critical value is calculated exactly. The design methodology is described and a design example is presented. Finally, a prototype is built and the experimental results verify the proposed method.

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Section: Mechanism Of Short Currentmentioning

confidence: 99%

“…This can eliminate the risk of sparks and electrical shocks and make the power transfer process safe and convenient. In recent years, this technology has seen more and more applications in EV charging, biomedical implants and consumer electronics [1][2][3][4][5][6]. Figure 1 illustrates a typical Current-Fed WPT system.…”

Section: Introductionmentioning

confidence: 99%

A Short-Current Control Method for Constant Frequency Current-Fed Wireless Power Transfer Systems

Duan

2017

Energies

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“…For example, several IPTECs use coreless transformers, as shown in Fig. 10, where the primary winding is fixed on the ground and the secondary is installed on the car and may be positioned above the primary winding in any direction or alignment [14], [19], [26]- [28]. The value of MIPTC frequency is dependent on the resonance topology, capacitor capacity, and magnetic parameters of the IPT.…”

Section: Tracking the Frequency Of Miptcmentioning

confidence: 99%

A New Maximum Inductive Power Transmission Capacity Tracking Method

Ameri¹,

Varjani²,

Mohamadian³

2016

Journal of Power Electronics

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In certain applications, such as IPT-based EV charger (IPTEC), any variation in alignment and distance between pickup and charger primary leads to a change in leakage and magnetic impedance magnitudes. The power transmission capacity is not always at the maximum level because of these variations. This study proposes a new low-cost tracking method that achieves the Maximum Inductive Power Transmission Capacity (MIPTC). Furthermore, in the proposed method, the exchange of information between load and source is not required. For an application such as IPTEC, the load detected by the IPTEC varies continuously with time because of the change in state of the charge. This load variation causes a significant variation in IPT resonant circuit voltage gain. However, the optimized charging output voltage should be kept constant. From the analysis of the behavior of the IPT circuit at different working frequencies and load conditions, a MIPTC operation point that is independent of load condition can be identified. Finally, the experimental results of a developed prototype IPT circuit test show the performance of the proposed method.

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“…Of all the different topologies, we chose in this work the SP-S topology [4], since it has the best performance when there is a possibility of misalignment between coils, and also presents current source nature, it which is suitable for charging batteries. The scheme of the system ( Testing the system safety was necessary to mount inside an aluminum cage.…”

Section: Not Shielded Iptmentioning

confidence: 99%

Inductive Battery Charging System for Electric Vehicles

Villa

Sanz

Sallán

2013

WEVJ

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For pure electric vehicles can reach the expected development and have become an alternative to conventional or hybrid vehicles, it is still necessary to solve various problems. The most important are to increase the autonomy of the vehicle and make charging process as quick and clean as possible. Inductive power transfer systems (IPT) can be the solution to these problems, on the one hand, the weight and size limitations of the batteries required for adequate autonomy can be solved with sufficient load points on public roads that allow "recharge" more frequently batteries or even the possibility that these are loaded by dedicated lanes moving. This is only feasible if the loading process requires no human intervention the maneuver faster and safe for the driver.Furthermore, the ability to recharge the batteries of a contactless EV is now a reality, as evidenced by the high number of patents and published papers, however, for these systems to be part of our daily lives, we need to meet strict international standards for human exposure to electromagnetic fields and, for this, the vehicle must be properly shielded. This paper shows the experimental development of a 30 kW inductive charger with shielding system and the results obtained.

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High-Misalignment Tolerant Compensation Topology For ICPT Systems

Cited by 411 publications

References 19 publications

A Short-Current Control Method for Constant Frequency Current-Fed Wireless Power Transfer Systems

A Short-Current Control Method for Constant Frequency Current-Fed Wireless Power Transfer Systems

A New Maximum Inductive Power Transmission Capacity Tracking Method

Inductive Battery Charging System for Electric Vehicles

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