Analysis of High-Frequency Class E Resonant Inverter and its Application in an Induction Heater

Gorain, Chiranjeeb; Sadhu, Pradip Kumar; Raman, Rahul

doi:10.1109/epetsg.2018.8659106

Cited by 8 publications

(3 citation statements)

References 4 publications

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“…It can achieve a theoretical 100% power efficiency by achieving zero voltage switching (ZVS) and zero-voltage derivative switching (ZVDS) [18]- [21]. Generally, the misalignment of the coils in IPT system will cause the overall efficiency of the system decreases significantly and therefore the ouput power drops proportionally [22]- [24]. On top of that, the class-E inverter will require less heat sinking and consume less power and therefore having lower manufacturing costs [25].…”

Section: Introductionmentioning

confidence: 99%

The design of inductive power transfer system for fish aquarium using class-E inverter and LCCL impedance matching

Saat

Yusop

Husin

et al. 2023

IJPEDS

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<p>Nowadays, the accessories in fish aquarium systems such as water pump, internal filter, and LED light are powered using cables. This will cause to safety issue such as tangled wire, and risk of electric shock. Therefore, this work aims to design a wireless power transfer system to power up the fish aquarium’ accessories wirelessly without require any physical connection between source and loads. To be more specific, inductive power transfer (IPT) is used instead of capacitive power transfer (CPT) due to high efficiency ability owned by IPT. Class-E inverter circuit is proposed in this paper to convert DC to AC at nearly 100% efficiency. The inverter provides a low switching loss which is important as the circuit operates at high frequency, 1 MHz operating frequency. Furthemore, LCCL impedance matching circuit is added into receiver part of the system to enhance the efficiency of overall circuit. The analyses were done based on the distance between the coils and the misalignment of the coils against the output power and efficiency. The developed prototype is supplied by 24 V DC and capable to deliver 5 W power. The overall efficiency of the prototype is 87.81%.</p>

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Section: Introductionmentioning

confidence: 99%

The design of inductive power transfer system for fish aquarium using class-E inverter and LCCL impedance matching

Saat

Yusop

Husin

et al. 2023

IJPEDS

View full text Add to dashboard Cite

show abstract

“…The Class-E Power Amplifier (PA), shown in Figure 1, has a wide range of applications due to its high efficiency. It is used in applications such as wireless power transmission systems [1], dedicated short-range communications [2], low-power RF devices [3], induction heater systems [4], and street-lighting [5]. In general, the PA designer analyzes the DC-feed inductance (i.e., L SH in Figure 1) as an RF-choke or a finite value and designs the overall circuit to guarantee Zero Voltage Switching (ZVS) and Zero Voltage Derivative Switching (ZVDS) conditions.…”

Section: Introductionmentioning

confidence: 99%

Design of the Class-E Power Amplifier with Finite DC Feed Inductance under Maximum-Rating Constraints

et al. 2021

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This paper proposes an analytical expression set to determine the maximum values of currents and voltages in the Class-E Power Amplifier (PA) with Finite DC-Feed Inductance (FDI) under the following assumptions—ideal components (e.g., inductors and capacitors with infinite quality factor), a switch with zero rise and fall commutation times, zero on-resistance, and infinite off-resistance, and an infinite loaded quality factor of the output resonant circuit. The developed expressions are the average supply current, the RMS (Root Mean Square) current through the DC-feed inductance, the peak voltage and current in the switch, the RMS current through the switch, the peak voltages of the output resonant circuit, and the peak voltage and current in the PA load. These equations were obtained from the circuit analysis of this ideal amplifier and curve-fitting tools. Furthermore, the proposed expressions are a useful tool to estimate the maximum ratings of the amplifier components. The accuracy of the expressions was analyzed by the circuit simulation of twelve ideal amplifiers, which were designed to meet a wide spectrum of application scenarios. The resulting Mean Absolute Percentage Error (MAPE) of the maximum-rating constraints estimation was 2.64%.

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“…Class-E power amplifiers (PA) are used in many RF applications, such as biotelemetry [1], plasma generation [2], wireless power transmission [3,4], dedicated short-range communications [5], magnetic resonant imaging [6], induction heater systems [7] and street-lighting [8]. This PA is attractive in applications that demand high power consumption, because it achieves a theoretical power efficiency of 100%.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Soft-Switching Tuning Effect on the Figures of Merit Involved in the Design of a Class-E Amplifier with Finite DC-Feed Inductance

et al. 2021

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This paper explores the design of a Class-E amplifier with finite DC-feed inductance using three tuning methods. Furthermore, this work quantifies the impacts of the tuning process (referred to in this paper as the tuning effect) on the main figures of merit (FoMs) of this amplifier. The tuning goals were to guarantee two conditions: zero voltage and zero voltage derivative switching (i.e., soft-switching tuning). To the best of the authors’ knowledge, systematic tuning methods have not been analyzed before for this amplifier topology. Two of them are based on the iterative component tuning process, and they have been explored previously in the design of the conventional class-E amplifier with an RF choke inductance. The last tuning method explores the simultaneous adjustment of the control signal period and one amplifier capacitor. The analyzed tuning methods were validated by extensive simulations of case studies, which were designed following the power specifications of the Qi standard. In 100% and 96% of the case studies, zero voltage switching (ZVS) and zero-derivative voltage switching (ZDS) were achieved, respectively. Furthermore, we identified an unexpected behavior in the tuning process (referred to in this paper as the turning point), which consisted of a change of the expected trend of the soft-switching (i.e., ZVS and ZDS) point, and it occurred in 21% of the case studies. When this behavior occurred and converged to at least ZVS, the tuning process required more iterations and a large number of tuning variables. Additionally, after the tuning process, the total harmonic distortion and output power capacity were improved (i.e., in 78% and 61% of the case studies, respectively), whereas the output power, drain and added power efficiencies deteriorated (i.e., in 83%, 61% and 65% of the case studies, respectively) in the overall case studies. However, we could not identify an improvement in the overall FoMs related to the soft-switching tuning. Furthermore, the tuning impact was significant and produced some improvements and some deleterious effects for the FoMs in each case study, without a clear trend by FoMs or by tuning method. Therefore, the amplifier designer may choose the more favorable tuning method and the related FoM trade-offs for the required design specifications.

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Analysis of High-Frequency Class E Resonant Inverter and its Application in an Induction Heater

Cited by 8 publications

References 4 publications

The design of inductive power transfer system for fish aquarium using class-E inverter and LCCL impedance matching

The design of inductive power transfer system for fish aquarium using class-E inverter and LCCL impedance matching

Design of the Class-E Power Amplifier with Finite DC Feed Inductance under Maximum-Rating Constraints

Analysis of the Soft-Switching Tuning Effect on the Figures of Merit Involved in the Design of a Class-E Amplifier with Finite DC-Feed Inductance

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