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Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)最新文献

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Novel switching control method for soft-switching DC-DC converter at light loads 轻负荷软开关DC-DC变换器的开关控制新方法
Pub Date : 2002-08-07 DOI: 10.1109/PCC.2002.997589
H. Kon, H. Kira
A novel switching control method for soft-switching DC-DC converter is proposed. The proposed control method is keeping the zero voltage switching (ZVS) switches off until snubber capacitors discharged. This method is simple and effectively achieves ZVS at light load. Without adding any auxiliary resonant component, it can provide compact and high efficient converter. Furthermore, by taking voltage fluctuation into consideration, the control method can achieve high reliability. This proposed method is applied to soft-switching DC-DC converter including ZVS arm.
提出了一种新的软开关DC-DC变换器开关控制方法。所提出的控制方法是保持零电压开关(ZVS)关闭,直到缓冲电容器放电。该方法简单、有效地实现了轻载零电压。在不增加任何辅助谐振元件的情况下,可以提供紧凑、高效的变换器。此外,该控制方法考虑了电压波动,具有较高的可靠性。该方法应用于含ZVS臂的软开关DC-DC变换器。
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引用次数: 3
Angstrom positioning system using a giant magnetostriction actuator for high power applications 埃姆定位系统采用超磁致伸缩致动器,适用于大功率应用
Pub Date : 2002-08-07 DOI: 10.1109/PCC.2002.998126
H. Nakano
In this paper, an angstrom order positioning system using a giant magnetostriction actuator is proposed and developed. This newly developed system can precisely control several /spl Aring/ positioning over several /spl mu/m stroke range for practical use. This system can also deliver high power output to move payload ranging from several gf to several tons. Moreover, this system has achieved state-of-the-art backlash free positioning by using the newly developed elastic displacement table and a newly developed giant magnetostriction actuator.
本文提出并研制了一种采用超磁致伸缩作动器的埃级定位系统。这个新开发的系统可以在几个/spl亩/米的行程范围内精确控制几个/spl的定位。该系统也能提供高功率输出来移动有效载荷范围从几gf到几吨。此外,该系统采用新开发的弹性位移表和新开发的超磁致伸缩执行器,实现了最先进的无间隙定位。
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引用次数: 9
Circuit configuration of bidirectional DC/DC converter specific for small scale load leveling system 小型负载调平系统专用双向DC/DC变换器电路结构
Pub Date : 2002-08-07 DOI: 10.1109/PCC.2002.997586
K. Hirachi, M. Yamanaka, K. Kajiyama, S. Isokane
Small scale energy storage system incorporating a battery bank has attracted special interest as a promising load leveling system. Because battery bank voltage of this system is low, it is important to use a bidirectional chopper suitable for large step-up/step-down ratio. In this paper we propose a circuit topology of bidirectional chopper appropriate for small scale load leveling system and present the analytical and experimental results.
结合电池组的小型储能系统作为一种有前途的负荷均衡系统引起了人们的特别关注。由于该系统的电池组电压较低,因此使用适合大升压/降压比的双向斩波器非常重要。本文提出了一种适用于小型负载调平系统的双向斩波电路拓扑,并给出了分析和实验结果。
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引用次数: 63
Computation and measurements of the DC link current in six-phase voltage source PWM inverters for AC motor drives 交流电机驱动六相电压源PWM逆变器直流环节电流的计算与测量
Pub Date : 2002-08-07 DOI: 10.1109/PCC.2002.998097
R. Bojoi, M. C. Caponet, G. Grieco, M. Lazzari, A. Tenconi, F. Profumo
Multiphase AC motor drives (with more than three phases) have some potential advantages as widely discussed in the literature. The DC-link capacitor size depends on the current RMS value, in particular, if the drive is supplied by a DC source, the current requested to the capacitor is basically determined by inverter input current AC component. The analytical computation of the capacitor current RMS value in the DC link of a voltage source PWM inverter, driving an induction motor, is extended from the common 3-phase systems to multiphase systems in general. In particular the six-phase-double star case has been analyzed in detail. The consistency of the analytical results have been tested through digital simulations. Furthermore, a 6-phase voltage source PWM inverter prototype has been designed and built to supply a multiphase induction motor drive: the experimental results confirm the validity of the mathematical/simulation approach.
多相交流电机驱动器(三相以上)有一些潜在的优势,在文献中广泛讨论。直流链路电容的大小取决于电流RMS值,特别是如果驱动器由直流电源供电,则要求给电容的电流基本上由逆变器输入电流AC分量决定。将驱动感应电机的电压源PWM逆变器直流环节电容电流RMS值的解析计算,从一般的三相系统扩展到一般的多相系统。特别对六相双星情况进行了详细的分析。通过数字仿真验证了分析结果的一致性。此外,设计并构建了一个6相电压源PWM逆变器原型,以提供多相感应电机驱动,实验结果证实了数学/仿真方法的有效性。
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引用次数: 18
Adhesion control in low-speed region and experiment verification with considering low-resolution pulse generator 低速区粘着控制及考虑低分辨率脉冲发生器的实验验证
Pub Date : 2002-08-07 DOI: 10.1109/PCC.2002.997636
M. Cao, K. Takeuchi, T. Furuya, A. Kawamura
An adhesion control performance in low-speed region considering a low-resolution pulse generator (PG) and experiment results are reported. In the proposed adhesion control methods, the wheel speed is required. However, in the railway field, the PG used for the wheel speed measurement is attached on the main motor and with only 60 pulse-per-revolution (ppr). Therefore, in the low-speed region, the speed value cannot be obtained in each control period. To solve this problem, a disturbance-instantaneous speed observer is proposed in this paper. The effectiveness of the proposed adhesion control with instantaneous wheel speed estimation has been verified by simulations and experiments.
报道了一种考虑低分辨率脉冲发生器(PG)的低速区粘着控制性能和实验结果。在所提出的附着控制方法中,对车轮转速有要求。然而,在铁路领域,用于车轮速度测量的PG附加在主电机上,并且只有60脉冲每转(ppr)。因此,在低速区域,无法获得每个控制周期的转速值。为了解决这一问题,本文提出了一种扰动-瞬时速度观测器。仿真和实验验证了基于瞬时轮速估计的附着控制的有效性。
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引用次数: 12
Study on maximum power point tracking of wind turbine generator using a flywheel 基于飞轮的风力发电机组最大功率点跟踪研究
Pub Date : 2002-08-07 DOI: 10.1109/PCC.2002.998568
A. Koyanagi, H. Nakamura, M. Kobayashi, Yasunori Suzuki, R. Shimada
This paper focuses on a maximum power point tracking for wind turbine generator (WTG) with a flywheel. Power coefficient C/sub p/, which has the optimum point, depends on a tip speed ratio (TSR). If we can adjust the angular velocity of WTG to wind speed with the frequency converter, we can realize the maximum power point tracking (MPPT) for WTG. Firstly, this paper explains a mechanism of wind power capture and necessity of flywheel. Secondly, we compare the difference between power ratio with and without a flywheel. We compare between fixed speed rotation operation and MPPT operation with data of the Tappi-zaki WTG system. As a result, a total power increase of up to 2 times has been obtained when the average wind speed is around 6.2 m/s (rated power is 275 kW). Finally, we proposed a simple small WTG system with permanent magnet type synchronous generator (rated power is 150 W) and wind turbine of 3-blades (rotor diameter is 1.24 m). We can make various wind speeds with the electric fan, so that we can evaluate MPPT operation with the experimental studies.
研究了带飞轮的风力发电机组最大功率点跟踪问题。功率系数C/sub p/具有最优点,取决于叶尖速比(TSR)。如果利用变频器将WTG的角速度调整为风速,就可以实现WTG的最大功率点跟踪。本文首先阐述了风力发电的机理和飞轮的必要性。其次,我们比较了有飞轮和没有飞轮的功率比的差异。我们用Tappi-zaki WTG系统的数据,比较了固定转速运转和MPPT运转。结果表明,在平均风速为6.2 m/s左右(额定功率为275 kW)时,总功率增长可达2倍。最后,我们提出了一种简单的小型永磁同步发电机(额定功率为150w)和三叶片风力发电机(转子直径为1.24 m)的WTG系统,我们可以用电风扇制造各种风速,从而通过实验研究来评估MPPT的运行情况。
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引用次数: 32
Three-phase PWM-current-source type PFC rectifier (theory and practical evaluation of 12kW real product) 三相pwm -电流源型PFC整流器(12kW实物理论与实际评价)
Pub Date : 2002-08-07 DOI: 10.1109/PCC.2002.998146
Y. Nishida, T. Kondoh, M. Ishikawa, K. Yasui
A new 3-phase-bridge PWM current-source-type (CST) (or buck-mode) PFC rectifier for telecommunications energy systems is introduced. The necessity, the advantages and disadvantages of this type PWM rectifier in the application are discussed. Then, a new power circuit topology and modulation scheme to eliminate or mitigate the disadvantages and obtain further new advantages of the PWM-current-source-type PFC rectifier are introduced. The features of the new rectifier obtained by the new PWM scheme have been confirmed through experimental results obtained from a 12 kW real product. Furthermore, variation of the efficiency and total-harmonic-distortion of the input line current for several DC-inductor arrangements are evaluated.
介绍了一种用于电信能源系统的新型三相桥式PWM电流源型(CST)(或降压型)PFC整流器。讨论了该型PWM整流器在实际应用中的必要性和优缺点。然后,介绍了一种新的功率电路拓扑结构和调制方案,以消除或减轻pwm电流源型PFC整流器的缺点,并进一步获得新的优点。通过一台12kw实际产品的实验结果,验证了新PWM方案所获得的整流器的特性。此外,还评估了几种直流电感布置方式下输入线电流的效率和总谐波畸变的变化。
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引用次数: 20
Single-phase soft-switched current-source inverter for utility interactive photovoltaic power generation system 用于公用交互式光伏发电系统的单相软开关电流源逆变器
Pub Date : 2002-08-07 DOI: 10.1109/PCC.2002.997591
H. Oishi, H. Okada, K. Ishizaka, R. Itoh
A novel single-phase soft-switched current-source inverter, which connects the photovoltaic arrays with the utility grid, is studied. To provide the soft-switching capability under the pulse width modulation for a line-commutated thyristor inverter, an auxiliary resonant switch to bypass the current on the DC side is connected across the DC input of a thyristor inverter. The arrangement tested, using two insulated-gate bipolar transistors and a single-phase thyristor bridge, is implemented to investigate the operation under the sinusoidal pulse width modulation. The operation is also simulated using PSpice. The experimental and simulated results confirm that the utility current can be sinusoidally waveshaped with a near unity power factor.
研究了一种连接光伏阵列与电网的新型单相软开关电流源逆变器。为了在脉宽调制下为线路整流晶闸管逆变器提供软开关能力,在晶闸管逆变器的直流输入端连接一个辅助谐振开关,以旁路直流侧的电流。采用两个绝缘栅双极晶体管和一个单相晶闸管桥进行了测试,以研究正弦脉宽调制下的工作情况。该操作也使用PSpice进行了模拟。实验和仿真结果证实,在功率因数近似为一的情况下,可以实现实用电流的正弦波化。
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引用次数: 4
Novel control scheme for adjustable speed synchronous machine drives 调速同步电机驱动的新控制方案
Pub Date : 2002-08-07 DOI: 10.1109/PCC.2002.998160
T. Chin, M. Nakano
The adjustable speed synchronous machine drive has been established as a high quality drive. Unity power factor control of the machine is expected to be of higher efficiency for the machine and for the inverter. The only existing method is for feedback control of the phase angle between input voltage and current to be zero. The control procedure is complex. This paper reports a newly developed forward control scheme for unity power factor control of the synchronous machine. Simulation shows good performance of the scheme.
调速同步电机传动已被确立为高质量的传动。机器的统一功率因数控制有望为机器和逆变器提供更高的效率。现有的唯一方法是反馈控制输入电压和电流之间的相位角为零。控制程序很复杂。本文提出了一种新的同步电机单位功率因数正演控制方案。仿真结果表明该方案具有良好的性能。
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引用次数: 2
Novel modulation method of single-phase bridge inverter for improved utilization of power devices 提高功率器件利用率的单相桥式逆变器调制新方法
Pub Date : 2002-08-07 DOI: 10.1109/PCC.2002.998096
K. Kawaguchi, S. Godo, T. Kawabata
This paper proposes a novel modulation method of a single-phase bridge inverter, which decreases the temperature rise of the power semiconductor devices and improves utilization factor of the devices. In case of conventional modulation methods, there is a temperature difference between the power devices of the four arms. This comes from unequal conducting and switching losses of the devices. Our proposed method eliminates the temperature difference by interchanging the lead and lag arms of the inverter every few cycles. We have confirmed the effect of the new modulation method by MATLAB simulation. In addition, the usefulness of the proposed modulation method has been verified by the experiment.
本文提出了一种新的单相桥式逆变器调制方法,降低了功率半导体器件的温升,提高了器件的利用率。在常规调制方法的情况下,四个臂的功率器件之间存在温度差。这是由于器件的不均匀传导和开关损耗造成的。我们提出的方法通过每隔几个周期交换逆变器的引线和滞后臂来消除温差。通过MATLAB仿真验证了新调制方法的效果。最后,通过实验验证了该调制方法的有效性。
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引用次数: 2
期刊
Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)
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