State-of-the-art of contactless energy transfer (CET) systems: design rules and applications

Trevisan, Riccardo; Costanzo, Alessandra

doi:10.1017/wpt.2014.2

Cited by 15 publications

(3 citation statements)

References 54 publications

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“…For this reason, in order to compensate the leakage on the inductances and improve the power transfer capability, the resonant capacitors at the primary and secondary windings are employed in CPT systems. Among the various compensation topologies, the SS topology has the advantage that the resonant frequency is independent of the load [14]. The configuration of the SS compensated CPT system is shown in Fig.…”

Section: Circuit Characteristicsmentioning

confidence: 99%

A Series-Series Compensated Contactless Power Transfer Based on the Rotary Transformer for the Drilling System

Kong¹,

Du²

2022

PIER M

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The electrical representation of the contactless power transfer (CPT) system with a coaxial transformer for the power traction in the rotary drilling system is presented. The air gap in the rotary transformer can lead to a lot of leakage inductance, so that the series-series (SS) compensation capacitors are used to increase the efficiency and the capability of the system. Moreover, the frequency response of the SS compensated CPT system is analyzed, and the transfer characteristics of the CPT system are revealed at different resonant frequencies. It is shown that the phase angle of the input impedance at resonant frequency determines the operation mode of the CPT system. At resonant frequency ω 0 , the system can operate in constant-current (CC) mode, whereas at resonant frequency ω H , it can work in constant-voltage (CV) mode. In the application of the drilling system, the CV mode owning good load regulation is more preferred than the CC mode for a wide range of load variation. At last, the analysis result is verified by experiment. The experimental results indicate that the CPT system in the CV mode can produce a 30 ∼ 35 V voltage output and can transfer maximum power 180 W with an efficiency of 78.5%. The proposed CPT system can well meet the requirement of power supply in the drilling system.

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Section: Circuit Characteristicsmentioning

confidence: 99%

A Series-Series Compensated Contactless Power Transfer Based on the Rotary Transformer for the Drilling System

Kong¹,

Du²

2022

PIER M

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“…Such a compensation is not possible in broad-band CET operation as considered here. However, according to [15], the positive effect of compensation towards efficiency is small when electromagnetic coupling in the CET is high. The proposed CET has a leakage ratio σ = φ σ,1 /φ 1 of about 7 %, hence coupling is k = √ 1 − σ ≈ 0.96, so CET efficiency should not be affected significantly (see Appendix A fur further details).…”

Section: Contactless Energy Transfer Systemmentioning

confidence: 99%

Design of Contactlessly Powered and Piezoelectrically Actuated Tools for Non-Resonant Vibration Assisted Milling

Silge

Sattel

2018

Actuators

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This contribution presents a novel design approach for vibration assisted machining (VAM). A lot of research has already been done regarding the influence of superimposed vibrations during a milling process, but there is almost no information about how to design a VAM tool where the tool is actually rotating. The proposed system consists of a piezoelectric actuator for vibration excitation, an inductive contactless energy transfer system and an electronic circuit for powering the actuated tool. The main benefit of transferring the required power without mechanical contact is that the maximum spindle speed is no longer restricted by friction of slip rings. A detailed model is shown that enables for preliminary estimation of the system's response to different excitation signals. Experimental data are provided to validate the model. Finally, some parts are shown that have been manufactured using the contactlessly actuated milling tool.Actuators 2018, 7, 19 2 of 17 apparent power operation. The vibration frequency and necessary stroke determine the type of the piezoelectric actuator.In VAM, when enhancing the machining process enhancement, e.g., cutting force and tool wear reduction or chip breakage improvement, is the focus, the piezoelectric actuators are driven at a single excitation frequency in resonance operation mode. The used frequencies are mainly in the ultrasonic frequency range. The advantage of high vibration frequencies is a higher possible upfeed velocity and thus decreased machining time at a given rate of vibrations per tool revolution [1] (p. 157).Research in VAT is based on non-resonant piezoelectric actuation to allow for nearly arbitrary periodic vibration forms of the tool tip. Both one-and two dimensional vibrations of either the tool tip or the workpiece are under investigation. Almost all actuators designed for examining VAT are non-rotating devices [8][9][10][11]. In [10], a 1D-actuator design was suggested and investigated that allows for vibration frequencies from DC up to 40 kHz. This enlarged frequency range comes at the cost of larger actuator volume. An off-the-shelf 1D-actuator for examining texturing under turning processes was chosen in [8]. As an add-on tool for conventional machines, Ref.[11] developed a 2D-actuator for elliptic cutting processes with rotating workpieces. Similarly, Ref.[12] developed and investigated an 2D-actuator for elliptic VAT in milling processes. There, the actuator is embedded in a cooling chamber. Contrary to the others, in [9], it is not the tool that is actuated but the workpiece, which limits their sizes. The application is also a milling process.Up to now, only Ref.[13] suggests a milling tool with an integrated rotating piezoelectric actuator. This tool allows for arbitrary cutting profiles. Using a specially shaped cutting plate, they showed the possibility to cut nearly any pattern into the surface of an object. The main disadvantage of this system is that the electrical power is transferred to the actuator using slip rings; therefore, the cutting...

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“…The coupling coefficient may be improved by various magnetic shapes such as combination of ferrite core and litz wire. The coils of high Q-factor enable protection from electromagnetic interference [72].…”

Section: Design Criteria Of Icpt Systemmentioning

confidence: 99%

Inductively coupled power transfer (ICPT) for electric vehicle charging – A review

Kalwar

Aamir

Mekhilef

2015

Renewable and Sustainable Energy Reviews

166

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a b s t r a c tThe deficiency in the availability of petroleum products has given rise to the incorporation of electric vehicles (EVs) globally as a substitute for the conventional transportation system. Significant research has been pursued over last two decades in the development of efficient EV charging methods. A preliminary review of few methods developed for wireless charging revealed that ICPT is a promising and convenient method for the wireless charging of EVs. This paper includes the equivalent circuit analysis and characteristics of the ICPT system and focuses on the research progress in respect of the designs for the charging coil, leakage inductance compensation topologies, power level enhancement and misalignment toleration. The improvement in these factors has been essential for the implementation of EV charging. A brief discussion over design process and control of ICPT system has been added. Conclusions have been made on the basis of the information extracted from the literature and some future recommendations are provided.

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State-of-the-art of contactless energy transfer (CET) systems: design rules and applications

Abstract: Link to this article: http://journals.cambridge.org/abstract_S2052841814000025How to cite this article: Riccardo Trevisan and Alessandra Costanzo (2014). State-of-the-art of contactless energy transfer (CET) systems: design rules and applications .

Cited by 15 publications

References 54 publications

A Series-Series Compensated Contactless Power Transfer Based on the Rotary Transformer for the Drilling System

A Series-Series Compensated Contactless Power Transfer Based on the Rotary Transformer for the Drilling System

Design of Contactlessly Powered and Piezoelectrically Actuated Tools for Non-Resonant Vibration Assisted Milling

Inductively coupled power transfer (ICPT) for electric vehicle charging – A review

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