Design of Single-Switch Inverters for Variable Resistance/Load Modulation Operation

Liu

IEICE Electron. Express

et al. 2017

In this study, a microcontroller-based battery test system for power battery is realized. The system is composed by a microcontroller, a sampling circuit, a human interface and a resonant load. The proposed resonant load having wide-range slew-rate and continuous loading features is used to verify the dynamic characteristics of the power battery thus can recycle energy in diagnostic process. Furthermore, the system can provide loading current according to battery specifications. The proposed system has both low cost and portable feature. Finally, this work provides analysis of operation principle, and test results to verify the theoretical feasibility.

“…The resonant load is achieved by class E topology [8,9,10], as shown in Fig. 4(a), which consists of two inductors (L 1 and L 2 ), two capacitors (C 1 and C 2 ), and one power switch (S).…”

Section: Resonant Loadmentioning

confidence: 99%

Design and implementation of a battery test system with energy recycling technique

Liu

IEICE Electron. Express

et al. 2017

IEEE Trans. Microwave Theory Techn.

“…As a result, this work seeks to maximize efficiency by minimizing the reactive component of the loading seen by the branch PAs. It is also noted that some types of switching amplifiers (including class E amplifiers) can be designed to work well across variable resistive loads, as described for example in [28], [47]. A consequence of this design goal is that the matching among the loading conditions of all four PAs is maximized.…”

Section: Theorymentioning

confidence: 99%

Multi-Way Lossless Outphasing System Based on an All-Transmission-Line Combiner

Barton

Jurkov

Pednekar

et al. 2016

Self Cite

Abstract-A lossless power combining network comprising cascaded transmission line segments in a tree structure is introduced for a multi-way outphasing architecture. This architecture addresses the suboptimal loading conditions in Chireix outphasing transmitters while offering a compact and microwavefriendly implementation compared to previous techniques. In the proposed system, four saturated power amplifiers interact through an all-transmission-line power combining network to produce nearly ideal resistive load modulation of the branch power amplifiers over a 10:1 range of output powers. This work focuses on the operation of the combining network, deriving analytical expressions for input-port admittance characteristics and an outphasing control strategy to modulate output power while minimizing reactive loading of the saturated branch amplifiers. A methodology for combiner design is given, along with a combiner design example for compact layout. An experimental four-way outphasing amplifier system operating at 2.14 GHz demonstrates the technique with greater than 60% drain efficiency for an output power range of 6.2 dB. The system demonstrates a W-CDMA modulated signal with a 9.15-dB peak to average power ratio (PAPR) with 54.5% average modulated efficiency at 41.1 dBm average output power.Index Terms-base stations, outphasing, power amplifier (PA), wideband code division multiple access (W-CDMA), Chireix, LINC, load modulation.

2016 IEEE 17th Workshop on Control and Modeling for Power Electronics (COMPEL)

“…While "classical" Class-E inverter designs impose significant constraints on loading to maintain ZVS operation (e.g., [11][12][13]), some single-switch inverters are suitable for variable-load operation. In particular, the variableload class E design introduced [14] can operate with low loss across a wide range of resistive, resistive/inductive and inductive loads. (While [14] only explicitly treats design for variable load resistance, the resulting inverter designs can maintain ZVS and low loss for resistive/inductive and pure inductive loads as well, so long as the active switch has an antiparallel diode or equivalently provides reverse conduction.)…”

Section: System Design and Controlmentioning

confidence: 99%

A new architecture for high-frequency variable-load inverters

Perreault

2016

Self Cite

Abstract-Efficient generation and delivery of high-frequency (HF, 3-30 MHz) power into variable load impedances is difficult, resulting in HF inverter (or power amplifier) systems that are bulky, expensive and inefficient. This paper introduces a new inverter architecture and control approach that directly addresses this challenge, enabling radio-frequency power delivery into widely variable loads while maintaining efficient zero-voltage switching operation. We model the proposed architecture, develop design and control guidelines for it and analyze the range of load admittances over which it can efficiently operate and deliver a specified output power. The opportunities posed by the proposed approach are illustrated through time-domain simulations of an example HF inverter system.