The design of a contact-less energy transfer system for a people mover system

Covic, Grant A.; Elliott, G.A.J.; Stielau, O.H.; Green, R.M.; Boys, J.T.

doi:10.1109/icpst.2000.900035

Cited by 145 publications

(54 citation statements)

References 3 publications

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“…To date, there have been limited studies on analyzing the power delivery of a planar inductive coupling system to multiple independent receiving units (e.g., multiple cell phones) via a single transmitting unit for consumer electronics applications. Research work on multiple receivers driving a single common load has been reported in [13][14][15] where the multiple receiving units can be turned on and off to control the power handling of the system. Although [16] shows the potential of supporting multiple receivers on a single transmitting platform, the analysis of the power delivery to a varying load was not presented.…”

Section: Introductionmentioning

confidence: 99%

“…Inductive coupling has been one of the leading candidates in achieving wireless power transfer at power levels ranging from several microwatts to thousands of watts [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Using near-field operation at frequencies below 1 MHz significantly lowers the probability of interference and RF safety issues since the wavelength is extremely long and radiation is limited.…”

Section: Introductionmentioning

confidence: 99%

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A Loosely Coupled Planar Wireless Power Transfer System Supporting Multiple Receivers

Low

Casanova

Lin

2010

Advances in Power Electronics

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A high-efficiency wireless power transfer system which is capable of supporting more than one receiver using class E operation for transmitter via inductive coupling has been designed and fabricated. The design approach of the system is also presented in this paper. The system requires no complex external control system but relies on its natural impedance response to achieve the desired power delivery profile across a wide range of load resistances while maintaining high efficiency to prevent any heating issues. A switch circuit is used to decouple the fully charged receiver from the system so that power delivery to the other receiver can be improved. The fabricated system at 12 V supply voltage is compact and capable of approximately 2.5 W of power delivery to each of the two receivers in a dual receiver setup and 5 W to a single receiver alone or when the other receiver is decoupled by the receiver switch. During high-power delivery state, the system efficiency is between 67.5% and 77.5%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Loosely Coupled Planar Wireless Power Transfer System Supporting Multiple Receivers

Low

Casanova

Lin

2010

Advances in Power Electronics

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“…Inductive Power Transfer (IPT) is a promising way to deliver power from a power source to a load or multiple loads via electromagnetic coupling in order to enhance system flexibility [1]- [17]. Nowadays, IPT systems have been employed in numerous applications which include low power wireless charging of biomedical implants [10], electric vehicle charging systems [16], and public transport systems [17].…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, IPT systems have been employed in numerous applications which include low power wireless charging of biomedical implants [10], electric vehicle charging systems [16], and public transport systems [17].…”

Section: Introductionmentioning

confidence: 99%

A Novel IPT System Based on Dual Coupled Primary Tracks for High Power Applications

Li¹,

Mai²,

Liwen³

et al. 2016

Journal of Power Electronics

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Generally, a single phase H-bridge converter feeding a single primary track is employed in conventional inductive power transfer systems. However, these systems may not be suitable for some high power applications due to the constraints of the semiconductor switches and the cost. To resolve this problem, a novel dual coupled primary tracks IPT system consisting of two high frequency resonant inverters feeding the tracks is presented in this paper. The primary tracks are wound around an E-shape ferrite core in parallel which enhances the magnetic flux around the tracks. The mutual inductance of the coupled tracks is utilized to achieve adjustable power sharing between the inverters by configuring the additional resonant capacitors. The total transfer power can be continuously regulated by altering the pulse width of the inverters' output voltage with the phase shift control approach. In addition, the system's efficiency and the control strategy are provided to analyze the characteristic of the proposed IPT system. An experimental setup with total power of 1.4kW is employed to verify the proposed system under power ratios of 1:1 and 1:2 with a transfer efficiency up to 88.7%. The results verify the performance of the proposed system.

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“…There are so many efforts involved, such as modification of a circuit component of rectifier or regulator [7,8], magnetic coupling which induces energy transmission [4][5][6][7][8][9][10], magnetic design of core properties [11][12][13], etc. For the improvement of inductive power efficiency, both the transformed geometrical and electrical factors of the circuit had been applied for the wireless energy transmission systems [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Estimation of Output Voltage and Magnetic Flux Density for a Wireless Charging System with Different Magnetic Core Properties

Park¹,

Kim²

2013

Journal of Magnetics

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The design model and key parameters of the material design for the control of induced magnetic flux at the near-field and efficient power transfer in a modified wireless power transfer (WPT) system with a large air gap of wireless electric vehicles were investigated through analytical simulations for magnetic vector and timedomain transient analysis. Higher saturation magnetic core with low core loss induced a stronger vertical magnetic field by the W-type primary coil in the WPT system with a gap of 20 cm at 20 kHz, which is shown from the vector potentials of the magnetic induction. The transient analysis shows that the higher magnetic fluxes through the pick-up cores lead to a linear increment of the alternating voltage with a sinusoidal waveform in the non-contact energy transfer system.

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The design of a contact-less energy transfer system for a people mover system

Cited by 145 publications

References 3 publications

A Loosely Coupled Planar Wireless Power Transfer System Supporting Multiple Receivers

A Loosely Coupled Planar Wireless Power Transfer System Supporting Multiple Receivers

A Novel IPT System Based on Dual Coupled Primary Tracks for High Power Applications

Estimation of Output Voltage and Magnetic Flux Density for a Wireless Charging System with Different Magnetic Core Properties

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