查询词典 constant voltage

The invention discloses an electrochemical method for preparing a hydroxylapatite particle thin coating on the surface of a metal implant, which comprises the following steps: electrolyte is put into a container equipped with a constant temperature heating system and heated to be 30 DEG C to 95 DEG C, and then the temperature is kept; platinum is taken as the anode and evenly distributed around the container, and the metal implant is taken as the cathode, put in the middle of the container and totally soaked in the electrolyte; DC voltage of 2V to 4V is added between the anode and the cathode, the surface of the metal implant has cathode reduction reaction, the pH value is increased and the supersaturation degree of the hydroxylapatite is also increased, so as to crystalize on the surface of titanium; after 0.5h to 5h of deposition, a layer of hydroxylapatite particle thin coating which can be excellently adhered to the matrix metal is formed on the surface of the implant.

本发明公开了一种在金属植入体表面制备羟基磷灰石颗粒薄涂层的电化学方法，在装备了恒温加热系统的容器中装入电解液，并将电解液加热到30～95℃恒温；将铂作为阳极均匀分布在容器四周，金属植入体作为阴极置于容器中间，完全浸没在电解液中，两极之间加直流电压2～4V，金属植入体表面发生阴极还原反应，pH值升高，羟基磷灰石过饱和度增加，从而结晶在钛金属表面；经过0.5～5小时沉积后，在植入体表面即可形成一层与基体金属结合优良的、薄的羟基磷灰石颗粒薄涂层。

The effect of the arc-ultrasonic irradiation on the adhesion coaling was investigated by keeping the ultrasonic frequency constant and changing the voltage, using the coating prepared in the absence of the arc-ultrasonic irradiation as a reference.

喷涂过程中保证超声激励频率不变，改变超声激励电压，并与不加超声进行对比，研究了其对涂层结合强度的影响。

This structure applies non-controlled rectifier, boost chopper and SPWM inverter chopper to convert the electric energy dynamited by electrical machine into alternating current which can be accessed to the constant frequency and voltage of electricity grid.

详细介绍了直驱型风力风电系统的组成结构及其变流系统的控制原理，给出了一种在考虑现有开关器件功率水平的情况下符合大功率直驱并网型风力发电机组要求的变流电路拓扑结构，并给出了相应的主要部分的具体应用电路。

The dynamic response of Buck circuit with COT (Constant On-Time) control is very fast, and its control circuit is simple. But its voltage regulation is not good, which inflects its application.

恒定导通时间控制的Buck电路瞬态响应速度快，控制电路简单，但其电压调整率差，影响了其在电压调整模块中的应用。

And under constant current stress, the percentage of generated traps to N〓 is related to the increment of gate voltage to ΔV〓, that is:〓 Based on the expression:〓, the Weibull distributions of 2 different gate oxide areas are analyzed, and it is concluded that the bird beak effect caused by LOCOS process does not influence the measurement results.

而在一定的电流密度下，一段时间内电压的增量与ΔV〓的比例反映了该应力过程中产生的陷阱占整个N〓的比例：〓我们根据关系式：〓，对两种面积MOS电容的威布尔分布进行分析，得出LOCOS工艺中场氧边缘的鸟嘴效应对于测试结果的影响是可以忽略的结论。

Using this method, wide dimming range can be achieved with narrow frequency range and constant DC link voltage. And the lamp current keeps perfect sine wave all the time, which means low lamp current crest factor is obtained. Its validity is verified by simulation and experiment.

本章最后提出了一种基于T型滤波器的新型的调光方法，采用此方法可以在保持逆变器直流母线电压和开关占空比不变的情况下，只需很窄的频率范围就能达到非常宽的调光范围，而且在整个调光范围内灯电流都基本上是完美的正弦波，这就意味着可以始终保持很低的灯电流波峰因数，仿真和实验结果充分验证了它的优点。

Production 200mm ~ 600mm, 400 400 mm, 500 500 mm of ordinary and high-density graphite electrode, using domestic technology of the sophisticated production of 3500 tons extrusion press; production 800mm ~ 1200mm above the carbon electrode, the use of domestic advanced horizontal high-frequency, amplitude of vibration of hydraulic molding machine production; calcination using low energy consumption, temperature, gas-balanced ring-type baking furnace; dipping into the cold out of hot billet; graphitization process color 16000KVA transformers, high current, low voltage, constant power; finished electrodes used comb knife domestic advanced way of processing, deviations small, with closely.

生产Φ 200mm ～Φ 600mm 、400×400㎜、500×500㎜普通和高密度石墨电极，采用国内技术成熟的 3500吨挤压机生产；生产Φ 800mm ～Φ 1200mm以上的炭素电极，采用国内先进的卧式高频、调幅液压振动成型机生产；焙烧采用能耗低、温度均衡的燃气式环式焙烧炉；浸渍坯热进冷出；石墨化工艺彩 16000KVA 变压器，大电流、低电压、恒功率；成品电极采用国内先进的梳刀方式进行加工，偏差小、配合紧密。

The mathematical model and working modes of a novel three-phase two-arm three-level neutral-point-clamped pulse width modulation rectifier suitable for direct-driving wind power system are analyzed in detail, and the constant frequency control strategies based on space voltage vectors are proposed and applied to the rectification conversion of direct-driven power generation system.

系统分析了新型三相两桥臂三电平中性点箝位脉宽调制(pulse width modulation，PWM)整流器的数学模型和工作模式，提出了基于空间电压矢量的恒频控制策略，并将其应用于直驱风力发电系统整流变换中。

When gas pressure is constant, delay decreases with the increase of laser energy and percent of self-breakdown voltage.

当激光能量一定时，延迟时间随充气压力的减小和电压的增加而减小，并且不同充气压力的延迟时间随电压变化的曲线斜率是随电压的增加而减小的。

In this paper,a type of conventional charger has been introduced,which makes use of capacitor to obtain voltage derating and constant current.

介绍了一种利用电容降压恒流为核心的蓄电池常规充电机，该充电机结构、原理简单，性能稳定，性价比高。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。