scholarly journals Design Methodology of Tightly Regulated Dual-Output LLC Resonant Converter Using PFM-APWM Hybrid Control Method

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2146
Author(s):  
HwaPyeong Park ◽  
Mina Kim ◽  
HakSun Kim ◽  
JeeHoon Jung
Keyword(s):  
Design Methodology ◽  
Control Method ◽  
Hybrid Control ◽  
Pulse Frequency ◽  
Voltage Regulation ◽  
Resonant Converter ◽  
Pulse Frequency Modulation ◽  
Load Range ◽  
Worst Case ◽  
Llc Resonant Converter

A dual-output LLC resonant converter using pulse frequency modulation (PFM) and asymmetrical pulse width modulation (APWM) can achieve tight output voltage regulation, high power density, and high cost-effectiveness. However, an improper resonant tank design cannot achieve tight cross regulation of the dual-output channels at the worst-case load conditions. In addition, proper magnetizing inductance is required to achieve zero voltage switching (ZVS) of the power MOSFETs in the LLC resonant converter. In this paper, voltage gain of modulation methods and steady state operations are analyzed to implement the hybrid control method. In addition, the operation of the hybrid control algorithm is analyzed to achieve tight cross regulation performance. From this analysis, the design methodology of the resonant tank and the magnetizing inductance are proposed to compensate the output error of both outputs and to achieve ZVS over the entire load range. The cross regulation performance is verified with simulation and experimental results using a 190 W prototype converter.

scholarly journals Analysis and Design of High-Efficiency Bidirectional GaN-Based CLLC Resonant Converter

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3859
Author(s):  
Yuanjun Liu ◽  
Guiping Du ◽  
Xueyi Wang ◽  
Yanxiong Lei
Keyword(s):  
Design Methodology ◽  
High Efficiency ◽  
Pulse Frequency ◽  
Resonant Converter ◽  
Pulse Frequency Modulation ◽  
Zero Voltage Switching ◽  
Analysis And Design ◽  
Reverse Mode ◽  
Parasitic Parameters ◽  
Zero Voltage

A bidirectional CLLC resonant converter (CLLC-BRC) based on GaN transistors is analyzed and designed in this paper. Similar resonant topologies are listed and commented on, with the CLLC topology showing competitiveness in bidirectional energy transmission. The analysis of the aforementioned converter has been provided, including the reveal of resonant frequencies of the CLLC topology and an improved zero-voltage switching (ZVS) condition with operation principles of the reverse mode and relevant parasitic parameters taken into account. The design methodology of the aforementioned converter based on pulse frequency modulation (PFM) is further discussed in detail. A prototype with a rated power of 400 W and a maximal operating frequency that is larger than 0.5 MHz was built to verify the proposed design methodology. The highest conversion efficiency of the prototype was 97.02% in the forward mode, and it was 95.96% in the reverse mode.

scholarly journals Optimal Design of a High Efficiency LLC Resonant Converter with a Narrow Frequency Range for Voltage Regulation

Energies ◽  
2018 ◽  
Vol 11 (5) ◽  
pp. 1124 ◽  
Author(s):  
Junhao Luo ◽  
Junhua Wang ◽  
Zhijian Fang ◽  
Jianwei Shao ◽  
Jiangui Li
Keyword(s):  
Optimal Design ◽  
High Efficiency ◽  
Voltage Regulation ◽  
Resonant Converter ◽  
Frequency Range ◽  
Llc Resonant Converter ◽  
Narrow Frequency Range

scholarly journals Dual Interleaved LLC Converter for High Power Applications and Wide Load Range

2019 ◽  
Vol 25 (3) ◽  
pp. 4-9
Author(s):  
Michal Frivaldsky ◽  
Jan Morgos ◽  
Andrej Kanovsky
Keyword(s):  
High Power ◽  
High Efficiency ◽  
Negative Impact ◽  
Power Converter ◽  
Switching Frequency ◽  
Resonant Converter ◽  
Load Range ◽  
High Switching Frequency ◽  
Llc Resonant Converter ◽  
Operational Range

Dual interleaved LLC resonant converter with half bridge topology of main circuit characterized by high switching frequency (500 kHz), high power density (60 W/inch3) and high efficiency (above 96 %) over entire operational range (20 %–100 %) is described. Focus was given on the practical design of power converter, which will be able to fulfil requirements on wide load range operation characterized by upcoming normative. Since proposed topology is based on dual interleaved LLC converter, the resonant component´s critical tolerance was also investigated to secure reliable and optimal operational point. Consequently, proposals for elimination of intolerance negative impact are also described. The results of theoretical analysis were verified directly through experimental measurements. Experimental results are finally compared with upcoming industrial standard 80 Plus Titanium.

scholarly journals A Wide Input Voltage And Output Load Range LLC Resonant Converter with Two Resonant Tanks

2010 ◽  
Vol 15 (6) ◽  
pp. 466-476 ◽  
Author(s):  
Kwang-Ho Yoon ◽  
Bong-Gun Chung ◽  
Sang-Ho Jang ◽  
Seung-Min Lee ◽  
Eun-Soo Kim
Keyword(s):  
Input Voltage ◽  
Resonant Converter ◽  
Load Range ◽  
Llc Resonant Converter ◽  
Output Load

Hybrid Control of a Manipulator and its Application

1990 ◽  
Vol 2 (1) ◽  
pp. 28-37
Author(s):  
Tatsuo Arai ◽  
◽  
Eiji Nakano ◽  
Tomoaki Yano ◽  
Ryoichi Hashimoto ◽  
...  
Keyword(s):  
Control Method ◽  
Hybrid Control ◽  
Reaction Force ◽  
Point Of View ◽  
Control Methods ◽  
Excessive Force ◽  
Worst Case ◽  
Positioning Control ◽  
Task Oriented ◽  
The Given

In complex asks such as sewing or assembly, where a robot has a mechanical interaction with its environments, we cannot expect to get a good result only by using the conventional positioning control of the robot. This is because that even the smallest positioning error may cause a large reaction force between the robot and its object, then it will stop the motion required for the task or, the worst case, it will damage the object as well as the robot itself. From this point of view, various kinds of control methods which enable a robot to move compliantly to avoid producing an excessive force when there is an interaction between the robot and objects In this paper we will propose a hybrid control method which can control both position and force of the manipulator in the given task-oriented coordinates. We can expect to have a good task quality by using this method compared with the conventional positioning control. The experiments of some actual tasks using an articulated manipulator with 2 d.o.f. will be also shown to demonstrate the feasibility and applicability of the proposed method.

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