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High frequency is an effective method to improve transmission efficiency of inductively coupled power transfer (ICPT) system. However, it is hard for the high capacity semiconductor device to meet the high frequency need. In this paper, a novel multiple-frequency inductively power transfer system is proposed. By adopting a novel multiple-frequency topology of inverter, the transfer frequency of the...
A segment control scheme of inductive power transfer (IPT) system for rail transit is proposed in this paper. In this scheme, the power supply range of primary coils along the track is segmented into several intervals and the several sets of pickups are installed aboard. When the vehicle runs, the switching frequency and the reference current of inverters is modulated with the position of the pickup...
A design for the inverter circuit configuration of integrated half-bridge modules with a focus on the circulating resonant current is clarified in this paper. Although this configuration has the advantages of small DC-side stray inductance, an analysis of the equivalent circuit suggests that a DC-side capacitor current increases depending on the relationship between the resonant and switching frequencies...
This paper presents a novel prototype of a time-sharing frequency doubler principle-based current-fed zero current soft-switching (ZCS) high frequency resonant (HF-R) inverter for inductive power transfer (IPT) systems. The newly-proposed ZCS HF-R inverter is suitable for producing a higher frequency resonant current with switching power loss reduction by using a middle-class switching frequency insulated-gate-bipolar-power...
By utilizing next-gen wide band-gap (WBG) devices, such as GaN and SiC, at high switching frequency in a single-phase Quasi-Z-Source PV inverter (qZSI), the impedance network can be significantly reduced. Although, the reduced qZS impedance network will decrease cost and improved power density, it will also result in frequency resonance that will introduce oscillations in the capacitor voltage and...
This paper describes an output filter design for a grid connected single phase three-level neutral-point-clamped quasi-Z-source inverter. New voltage distortion approach was proposed and compared with classical solution. The simulation and experimental results are discussed.
This paper presents a power control strategy of the full-bridge series resonant inverter based on the asymmetrical voltage-cancellation control with variable-frequency in induction cooking appliances with a load of low Q factor on the domestic markets. The switching frequency of inverter is suitably operated higher than the resonant frequency under zero-voltage-switching (ZVS) condition. The proposed...
Nowadays, the LCL-filter type becomes an attractive grid interfacing for grid-connected Voltage Source Inverter (VSI). LCL-filter can render the current harmonics attenuation around the switching frequency by using smaller inductance than L-filter. Moreover, system using LCL-filter does not depend on the grid impedance and has a better output response while comparing with LC-filter. Firstly, an analysis...
This paper researches the electronic ballast based on self-coupled transformer for 70 W high pressure sodium lamp. The original power source comes from the grid, a boost pre-regulator between the input rectifier bridge and the filter capacitor serves unity power factor purpose. A buck topology with the LCpCs resonant circuit, which consists of self-coupled transformer and capacitors, satisfies the...
This paper presents a PV grid-connected system in centralized configuration and constructed with a three-phase dual-stage inverter. In this topology, usually, a DC-DC converter performs the maximum power point tracking (MPPT) and an inverter is responsible for controlling the grid-current. For the DC-DC stage the three-phase series resonant converter (SRC3) is chosen thanks to the advantages that...
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