Browsing by Author "Huang, Wen-Nan"

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A New Methodology Aiming for Enhancement of Power Supplies Design Evaluation for Light-Load Efficiency Improving Based on Loop-Gain Analytical Technique
(2009)
Huang, Wen-Nan
;
Lee, Shiu-Hui
;
Lin, Chien-Fa Bao-Tung Lin
;
Chen, Jim-Cheng
;
Lin, Bao-Tung
A methodology, utilizing loop gain of circuitry to extract the main features for providing the useful indexes being able to come out the evaluation of light-load operation efficiency for power supply design, is proposed herein. A DC-to-DC converter scheme for adaptor application is adopted for demonstrating the relation between switching device conduction duty cycle ratio, loop gain, and efficiency improving at light load operation through skipping cycle setting and implementation. Analysis for figuring out gradient based on loop gain to duty tuning is taken into account and the succeeding derivation is verified to be the important factor for instructing the related circuit parameter selection among gain of feedback control loop and the open-loop control gain in an efficient way with referable criteria. The design flowchart followed and the effectiveness demonstrated applying the presented analysis are both provided through a comparison from the output of the proposed indexes.
A novel design and driving strategy for a hybrid electric machine with torque performance enhancement both taking reluctance and electromagnetic attraction effects into account
(2006-09-01)
Huang, Wen-Nan
;
Chen, Wan-Pei
;
Teng, Ching-Cheng
;
Chen, Mu-Ping
;
電控工程研究所
A novel design, the hybrid electric machine, that owns improved competence for the output torque regulation as well as enlarged power density comparing to the conventional brushless machines by making use of the simultaneous performance overlapping concept based on magnetism is proposed in this paper. The developed design concept is focused on electric machine structure and its counterpart drive for applying two main magnetic-power transmitting paths by combination of both features of magnetic tendencies of flux generation that may flow in the path with minimum reluctance and direction owning the electromagnetic motive attraction. The verifications demonstrate that the outputted torque owns effective improvement by the presented concept of the electric machine based on the equivalent 3-hp frame than the conventional brushless motors. (C) 2006 Elsevier B. V. All rights reserved.
A novel design of the high-precision magnetic locator with three-dimension measurement capability applying dynamically sensing mechanism
(2006-09-01)
Huang, Wen-Nan
;
Chen, Po-Shen
;
Chen, Mu-Ping
;
Teng, Ching-Cheng
;
電控工程研究所
A novel design of the magnetic locator, for obtaining the high-precision measurement information of variety of the buried metal pipes, is presented in this paper. The concept of dynamically sensing mechanism, including the vibrating and moving devices, proposed herein is a simple and effective way to improve the precision of three-dimension location sensing for the underground utilities. Based on the primary magnetism of Lenz's law and Faraday's law, the functions of the amplifying effect for the sensing magnetic signals, as well as the distinguishing effect by the simple filtering algorithms embedded in processing programs, are achieved while the relatively strong noise exists. The verification results of these integration designs demonstrate the effectiveness both by precise locating for the buried utility, and accurate measurement for the depth. (C) 2006 Elsevier B. V. All rights reserved.
Design and control strategy applying the novel highly effective magnetic flux coupling (HEMFC) scheme for a non-contact power transfer system
(2006-09-01)
Chen, Wan-Pei
;
Huang, Wen-Nan
;
Chen, Po-Shen
;
Fan, Tsun-Yao
;
Chen, Mu-Ping
In this paper, the novel design concept for highly effective magnetic flux coupling (HEMFC) schemes, based on enhancement of path guiding effect for leakage flux transmitting, is proposed for a non-contact power transfer system. Two implementation techniques are presented herein utilizing simple structure opinions of specific slant air gap as well as adding of metal bushing components. Both simulation and experimental results demonstrate that the improvement of magnetic coupling ratio and overall system efficiency are achieved by applying the two HEMFC schemes as the power transmitting devices. (C) 2006 Elsevier B. V. All rights reserved.
Inductance Measurement and Estimation Method Utilizing LC Circuit Analysis Techniques under Dynamic Operation for Switched Reluctance (SR) Machines
(2004)
Huang, Wen-Nan
;
Teng, Ching-Cheng
;
Fang, Chih-Hsing
;
Chen, Chih-Hsin
;
電控工程研究所
The method for the inductance measurement applying the LC circuit concept, which means circuit with inductance and capacitor effect, for analysis of switched reluctance (SR) motors in operation status is proposed in this paper. The inductance profile is an important parameter hearing on the performance of a SR motor. The main strategy of the presented methodology is to combine the standard circuit topology analysis results and machine's equivalent model to find B dynamic measurement method for the inductance related magnetization characteristics. The capacitors in series or parallel connection to the SR machine phase inductance are the key components to construct the applicable LC circuit analysis model. Besides, this method owns the capability that being easy to be extended to estimate the incremental inductance for further performance prediction. The measurement results of two SR motors taken into verification both demonstrate the effectiveness of this method under dynamic operation condition while comparing to the conventionally off-line static measurement.