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Energies 2017,10, 315
coil’spowerwas lostat±4cm,andnearlyallof itspowerwas lostat±8cm.Theresults inFigure20
verify the theoryexplainedinSection2,andthus, justify theneedfor theproposedACASsystem.
Figure 20. Voltage and currentmeasured at the load, and its calculated power (first experiment:
static load).
Figure 21 shows the voltagewaveforms of the load coil and the sensor coilmeasured from
the oscilloscope. Figure 21a,b representwhen the load coil has a leftmisalignment, and a right
misalignment, respectively. Thecapturedresults indicate that significantnoise ispresent in thesensor
coilwaveform. Thesearefilteredout througha low-passfilterbeforebeingconverted intoa logic
signal as shown in the circuit schematic in Figure 19. Based on the results shown in Figure 21a,
thephasedifferencebetweenthe loadcoilandsensorcoil is118.9degrees (leftmisalignment),while
thephasedifference inFigure21b is−57.3degrees (rightmisalignment). Thedifferencebetweenthe
tworecordedphasevalues is176.2degrees,which isnear the180phaseangledifferencedescribed in
the lastparagraphinSection3.1.
(a) (b)
Figure21.Oscilloscopereadings fromthefirstexperimentshowingthevoltagewaveformof the load
coilandthesensorcoilunitat (a) leftmisalignment;and(b) rightmisalignment.
4.3. ExperimentalResults fromtheSecondExperiment (Load: ExperimentalVehicle)
The recorded load coil and sensor coil waveforms for the second experiment are shown in
Figure22. Theseresults showcharacteristics similar to theresults showninFigure21, except there
isa lowervoltageamplitude,because thesourcecoilwasoperatingata10Wpower level. Basedon
the recordeddata, thephaseof the sensor coil relative to the loadcoil for the left side (Figure22a)
338
Emerging Technologies for Electric and Hybrid Vehicles
- Title
- Emerging Technologies for Electric and Hybrid Vehicles
- Editor
- MDPI
- Location
- Basel
- Date
- 2017
- Language
- English
- License
- CC BY-NC-ND 4.0
- ISBN
- 978-3-03897-191-7
- Size
- 17.0 x 24.4 cm
- Pages
- 376
- Keywords
- electric vehicle, plug-in hybrid electric vehicle (PHEV), energy sources, energy management strategy, energy-storage system, charging technologies, control algorithms, battery, operating scenario, wireless power transfer (WPT)
- Category
- Technik