A multi-level converter for high power-high frequency IPT systems

Rahnamaee, Hamid Reza; Madawala, Udaya K.; Thrimawithana, Duleepa J.

doi:10.1109/pedg.2014.6878623

Cited by 27 publications

(15 citation statements)

References 19 publications

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“…This paper proposes a GaN HFET based high frequency power full bridge inverter which converts the DC power into an AC square wave using Phase Shift Modulation (PSM). PSM operates in a way that the two power transistors in the same leg are operated at 50% duty cycle at 180° phase shift from each other and the two legs of the inverter operate at certain phase differences which vary the duty cycle of the output voltage of the inverter [15]. By varying the phase difference, the inverter can vary the output power.…”

Section: A Overall Systemmentioning

confidence: 99%

A high frequency, high efficiency GaN HFET based inductive power transfer system

Cai

Pereira

Tanzania

et al. 2015

2015 IEEE Applied Power Electronics Conference and Exposition (APEC)

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This paper aims to develop an Inductive Power Transfer (IPT) system targeting at Electric Vehicles (EV) and Hybrid Electric Vehicles (HEV). IPT systems provide significant benefits over conventional plug-in chargers. However, in order for IPT to be adopted for EV charging, efficiency is a key Figure of Merit (FOM) which needs to be achieved. This paper develops an inverter using Gallium Nitride (GaN) power transistors which have the benefit of low on-resistance and gate charge to reduce the switching and conduction loss. A design methodology for optimising the switching performance of the power transistor is developed in order to minimise switching loss while keeping overshoot under control. An efficiency centric control method is proposed to improve the efficiency of the system, while ensuring sufficient power transfer. The evaluation results show that a GaN based system is capable of outperforming a SiC based system. At a gap of 150mm, the system obtains above 90% efficiency at 1.3 kW. The system efficiency peaks at 95% at 100 kHz operation and 92% at 250 kHz operation at a distance of 80mm for 2kW output power.

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Section: A Overall Systemmentioning

confidence: 99%

A high frequency, high efficiency GaN HFET based inductive power transfer system

Cai

Pereira

Tanzania

et al. 2015

2015 IEEE Applied Power Electronics Conference and Exposition (APEC)

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“…MC is considered to be the best solution to solve these issues. Several MC topologies have been presented in literature to solve this issue [5] - [7].…”

Section: A Topology Descriptionmentioning

confidence: 99%

“…Therefore, research on power converters used in high power IPT systems becomes an important issue. Towards the aim of increasing power scalability and the overall efficiency, several attempts have been made in terms of using multiphase IPT systems [1] - [3], multi-input/multi-pickup IPT systems [4], multilevel converter (MC) topologies [5] - [7] and optimizing the efficiency [15] - [16].…”

Section: Introductionmentioning

confidence: 99%

A multilevel converter topology based bidirectional inductive power transfer system with improved characteristics

Nguyen

Vilathgamuwa

Foo

et al. 2015

2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)

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LCL network is one of the best choices for compensating bidirectional inductive power transfer (BIPT) systems. However, H -Bridge power converter of the conventional BIPT systems generates highly distorted AC current which results in reduced overall system efficiency particularly in high power BIPT systems. In order to overcome this drawback, a multilevel converter (MC) with selective harmonic distortion (SHE) modulation method is presented in this paper to eliminate high order harmonic components in converter voltages at both sides of BIPT systems. The proposed MC topology is constructed using a modified H -Bridge converter with minimum number of power switches. The proposed topology is suitable for low to medium power applications. The simulation results demonstrate the feasibility of the proposed scheme.

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“…Multi-level technology has been adopted in IPT systems in [19], [20]. A high frequency multi-level IPT system suitable for high power application was described in [19].…”

Section: Introductionmentioning

confidence: 99%

“…However, harmonic distortion, power losses, power factor and efficiency were analyzed in detail without consideration of the power regulation or/and selective harmonic elimination. Recently, a MOSFET-IGBT multi-level converter, which can reduce the overall costs and the number of harmonic components [20], was proposed for IPT based high frequency fast chargers. This converter needs to solve transcendental equations instead of providing explicit solutions for the SHE equation.…”

Section: Introductionmentioning

confidence: 99%

Cascaded Multi-Level Inverter Based IPT Systems for High Power Applications

Li¹,

Mai²,

Yang³

et al. 2015

Journal of Power Electronics

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A single phase H-bridge inverter is employed in conventional Inductive Power Transfer (IPT) systems as the primary side power supply. These systems may not be suitable for some high power applications, due to the constraints of the power electronic devices and the cost. A high-frequency cascaded multi-level inverter employed in IPT systems, which is suitable for high power applications, is presented in this paper. The Phase Shift Pulse Width Modulation (PS-PWM) method is proposed to realize power regulation and selective harmonic elimination. Explicit solutions against phase shift angle and pulse width are given according to the constraints of the selective harmonic elimination equation and the required voltage to avoid solving non-linear transcendental equations. The validity of the proposed control approach is verified by the experimental results obtained with a 2kW prototype system. This approach is expected to be useful for high power IPT applications, and the output power of each H-bridge unit is identical by the proposed approach.

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A multi-level converter for high power-high frequency IPT systems

Cited by 27 publications

References 19 publications

A high frequency, high efficiency GaN HFET based inductive power transfer system

A high frequency, high efficiency GaN HFET based inductive power transfer system

A multilevel converter topology based bidirectional inductive power transfer system with improved characteristics

Cascaded Multi-Level Inverter Based IPT Systems for High Power Applications

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