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电源效率
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  power efficiency
     PWM constant current driving IC is designed to increase the power efficiency up to 87%.
     针对串联饱和型恒流驱动工作模式下电源效率低的不足,研究了脉宽调制型恒流驱动集成电路,使电源效率可提高至87%。
短句来源
     The High Throughput S-MAC (HTSMAC) is expected to enable wireless video network applications with optimum power efficiency and high throughput network performance.
     本协议高吞吐量传感器网络MAC(High Throughput S-MAC,HTSMAC)具有为无线视频网络提供优化的电源效率和高吞吐量的网络性能。
     Maximize Power Efficiency with DC/DC Converters in Portable Media Players
     用DC/DC转换器最大化便携媒体播放器电源效率
短句来源
     The control methods of DC-DC converter such as pulse width modulation (PWM), pulse frequency modulation (PFM) and PWM/PFM hybrid control are analyzed together with their power efficiency. The result shows that PWM is high efficiency in high load and PFM is high efficiency in light load. So PWM/PFM automatic switching DC-DC converter is proposed to lower the power loss and improve the power efficiency.
     本文首先介绍了降压DC-DC转换器的主电路结构及工作原理,讨论了DC-DC转换器的功率损耗源,分析了脉冲宽度调制(Pulse Width Modulation,PWM)、脉冲频率调制(Pulse Frequency Modulation,PFM)和PWM/PFM混合控制等DC-DC转换器的控制方法及其电源效率
短句来源
     The power efficiency of the chip is designed to larger than 80%.
     整个控制电路的电源效率超过80%。
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  “电源效率”译为未确定词的双语例句
     Efficiency of 87% is readily achievable with improvement of nearly 25% compared with the formerly designed DC mode constant current driving chip~ [1] .
     芯片的电源效率可达87%,与以前设计的串联饱和型半导体照明LED恒流驱动芯片[1]相比提高近25%。
短句来源
     The switching frequency is 20kHz. Output of DC high-voltage power-supply which can be chosed by DSP is 25kV, 50kV, 75kV, 100kV. The ripple coefficient is no more than 0.5%. The efficiency of the power-supply system is more than 80%.
     本电源功率100W,开关频率为20kHz,高压直流电源输出电压25kV、50kV、75kV、100kV定点可调,纹波系数不大于0. 5%,整个电源效率在80%以上。
短句来源
     The principle of operation and the characteristics of the scheme are analyzed in time domain and frequency domain, and verified on a 36V-75V input 1.8V/60A output experimental prototype, whose size is 1/4 brick and efficiency is above 90% at rating condition.
     文中从时域和频域两个角度对此电路进行了详细的原理分析。 采用所推荐驱动电路的 36~75V输入,1.8V/60A 输出,四分之一砖标准的模块电源效率高达 90%以上。
短句来源
     The efficiency of the driver can reach up to 63.4%.
     该恒流驱动芯片的电源效率可达63.4%。
短句来源
     Discussion on Efficiency and Noise of Switch Power
     谈谈开关电源效率及开关噪声
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  相似匹配句对
     Something about Efficiency of On-off Electric Source
     谈开关电源效率
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     Power Supplies
     电源
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     Power Sources
     电源
短句来源
     Measure the Efficiency of a Power Supply'S Transformer in Experimentation
     电源变压器效率的实验测定
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     On Efficiency
     论效率
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  power efficiency
Simulation results show that the proposed algorithm has advantages over the topology control algorithm based on direct-transmission region in terms of average node degree and power efficiency.
      
The dependences of the discharge current on both the gas pressure in the induction electrode tube and the winding pitch of the corona electrode, as well as of the discharge power efficiency on the applied voltage, have been measured.
      
The parameters of the plasma and magnetic system are calculated for several versions corresponding to the high power efficiency (with a power gain factor in plasma of Q = 20) in a reactor with an aspect ratio of A = 1.5.
      
The vircator radiation power was 300 MW at a power efficiency of about 5% and a pulse duration of 50 ns.
      
In addition to saving electric energy (in some cases up to 70%) operational parameters of equipment (accuracy, power efficiency, etc.) are improved, while the cost of investments is decreased.
      
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Amorphous alloys FeCoVSiB (1) and FeCoNiSiB (2) were prepared by single roller rapid quenching technique. The magnetic properties after longitudinal field annealing are B1=5900G, Br /B1=0.96 Hc =0.003Oe,μm= 165×10° and P=33W/kg at f=20kHz and B=5000G. The relations between the power loss per cycle and the frequency for three different annealing processes were established. These two alloys can be used at high frequencies up to 200 kHz for magnetic amplifier switching power supply with output of 12V, 9A. The efficiency...

Amorphous alloys FeCoVSiB (1) and FeCoNiSiB (2) were prepared by single roller rapid quenching technique. The magnetic properties after longitudinal field annealing are B1=5900G, Br /B1=0.96 Hc =0.003Oe,μm= 165×10° and P=33W/kg at f=20kHz and B=5000G. The relations between the power loss per cycle and the frequency for three different annealing processes were established. These two alloys can be used at high frequencies up to 200 kHz for magnetic amplifier switching power supply with output of 12V, 9A. The efficiency of the device is above 80%.

非晶态(FeCo)_(70)V_2(SiB)_(28)(合金1)和Fe_(7.6)Co_(38)Ni_(30.4)Si_6B_(18)(合金2),用单辊快淬技术制备。经过纵向磁场退火之后,合金1的性能达到:B_1=5900G,B_r/B_1=0.96,H_c=0.003Oe,μ_m=165×10~4,在频率20kHz和B=5000G时,铁芯损耗P_(5/20kc)=33W/kg。还给出了合金1于四种不同热处理状态下的每周损耗与频率f的关系,由损耗分析看出:在频率高达20kHz时,尽管涡流损耗很大,但磁滞损耗仍占相当大的比例。用上述两种合金制做的频率达150~200kHz的高频磁放大器式开关电源,输出12V、9A,整机电源的效率达80%以上。另外,合金经过120℃、100h的老化试验和-50℃~120℃的温度稳定性试验,表明在20kHz和5000G条件下的幅值磁导率和损耗的变化均小于10%。

In this Paper, the reasons of low-efficiency about the conventional voltage regulator are analysed. The circuit design of high-efficiency voltage regulator which has efficiency of more than 90% is made and test result is given.

本文分析了一般常用稳压电源效率不高的原因,提出了一种新的、效率达90%以上的稳压器,并提供了实验结果。

Starting from analysing the efficiency of constant current analogue-type transistor arc welding power source,the authors found that it is necessary and rational to develop a switch-type transistor arc welding power source. After mathematical analysis of the work process of main circuit, the function relationship of the regulation sensitivity to the ratio of pulse width was abtained. In this paper, the problems of choosing and protecting large power transistors have been analyzed theoretically in detail. Especially,...

Starting from analysing the efficiency of constant current analogue-type transistor arc welding power source,the authors found that it is necessary and rational to develop a switch-type transistor arc welding power source. After mathematical analysis of the work process of main circuit, the function relationship of the regulation sensitivity to the ratio of pulse width was abtained. In this paper, the problems of choosing and protecting large power transistors have been analyzed theoretically in detail. Especially, a new idea of originality was put forward by using series resistance in emitter to avoid secondary voltage breakdown. The paper also provides the technical data of the 120A switch-type arc welding power source and the experimental results of welding a circular butt joint of stainless steel thin-wall shell with TIG.

本文就分析恒流模拟型晶体管弧焊电源效率问题着手,提出了开发开关型晶体管弧焊电源的必要性与合理性。并对其主电路工作过程进行了数学求解,得出了调节灵敏度与占空比的函数关系式。文章对大功率晶体管的选择与保护问题从理论上进行了详细的剖析,尤其对采取串接均流电阻以防止二次电压击穿提出了新见解。文章最后给出了研制的120A开关型晶体管弧焊电源的技术数据和进行不锈钢薄板环对接的TIG焊工艺试验结果。

 
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