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A Contactless Receptacle Applied to DC Power Distribution
(2021-01-01)
Pairindra, Worapong
;
Khomfoi, Surin
The modern household power distribution with dc-to-dc power transfer is presented in this paper in order to demonstrate inductive power transfer technology over air-core and ferromagnetic-core. A high-frequency switching with a five-level diode clamped multilevel converter plays an important role in generating a low-%THD voltage waveform in order to increase the power density or reduce the size of the plug and receptacle. The major setbacks of using the dc-to-dc power transfer with electric shock, galvanic isolation issue and arc discharge on the contactor have been solved by using the inductive power transfer. In addition, an LLC series resonant tank is integrated with the power converter to satisfy the Zero-Voltage Switching (ZVS) condition of all active switching devices. The proposed contactless receptacle technique is validated by using MATLAB/Simulink and a developed hardware prototype. The efficiency of the power transfer while using the magnetic material core versus the air-core type is approximately 83.8% and 92.6%, respectively.
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The plug and outlet for home appliances in DC low voltage micro-grid system
(2017-11-03)
Pairindra, Worapong
;
Khomfoi, Surin
This proposed paper introduces the more effectiveness of power transferring in dc micro-grid power distribution in order to comprehend the usage of home appliances. A 300V 5-level diode clamped multilevel is operated as power source for contactless power transfer with a selective harmonic elimination(SHE) technique, and the output is set at 48 V 300W with the efficiency at 92.6%. The converter generates 200 kHz switching frequency to send a highly magnetic coupling through primary coil over ferromagnetic material in tight coupling condition. The paper aims are to eliminate the electric shock, galvanic isolation and arch free in dc to dc power conversion. Additionally, the lower %THD can reduce designed parameters which mean the power density will be increased. The output will be illustrated in both simulation and implementation results.
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The enhancement of multilevel converter for coaxial inductive power transfer in low voltage DC power distribution
(2016-09-06)
Pairindra, Worapong
;
Khomfoi, Surin
The contactless power transfer of dc plug and outlet is proposed in this paper for domestic home appliances dc power system. The medium size dc to dc converter is chosen for transferring 300 V input voltage and generated a 5-level with 600 kHz output voltage by using diode clamped multilevel converter. The output power is set at 300W 48V and the solenoid transformer is functioned as an inductive power transfer (IPT) system. The aims of this proposed paper are to achieved the low switching loss in switching devices, the arch free, the risk of the electric shock and galvanic isolation of the low voltage dc power distribution system. Moreover, the advantages of using the multilevel converter with high switching frequency for high power density design and low THD are illustrated in the MATLAB/Simulink simulation results.
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The optimization of series resonant LLC half-bridge converter with coreless transformer design in a low voltage DC distribution system
(2015-08-17)
Pairindra, Worapong
;
Khomfoi, Surin
This paper will present the optimization design for medium size converter with high switching frequency for household appliances. The series resonant LLC half-bridge converter, 1 kW, 48V and 600 kHz with coreless transformer has been chosen for the power transferring. System verification has been done by MATLAB/Simulink program, which used to find the optimized parameters and converter output under designed conditions.

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