恒定电压

This protection machine series product make use of to respond to quickly not the line presses the component , assurance the direct current system is positive, the anode, cathode and as and anodes and the potential difference of the as settle, allowing appear temporary in the direct current system conduct electricity press limit the weak electricity equipments inside the scope, thus insuring the equipments safety movement.

本保护器系列产品利用快速响应的非线性压敏元件，保证直流系统正、负极间，正极与地间及负极与地间的电位差恒定，将直流系统中出现的暂态过电压限制到弱电设备的允许范围内，从而确保设备安全运行。

The relatively constant values of open circuit voltage suggest the electrolyte layer withstands thermal shock due to high thermal conductivity and excellent ductibility of the metal substrate.

相对恒定的开路电压显示，电解质层经受住了热冲击，此受益于金属支撑体良好的导热性和延展性。

Most parameters for the mixture antioxidation oil were studied and they were consistent with GB 2536-90, including transparence, smell, density, solidifying point, flash point, viscosity, acids and water-solubility acids;The viscosity of the antioxidation oil at 20℃～90℃was as same as mineral;And the relative permittivity at 30～106Hz was invariable and it was higher than mineral oil so that the electric field of the antioxidation oil paper insulation was more equilibrious.

研究得到了所研制的抗老化变压器油的参数值：透明度、气味、密度、凝点、闪点、运动粘度、酸值及水溶性酸或碱等，均满足变压器油技术标准GB 2536-90的要求；20℃～90℃之间该油运动粘度和矿物油几乎相等；在30～106Hz频率范围内，该油相对介电常数基本维持恒定，且比矿物油相对介电常数略大；其工频击穿电压远高于矿物油。

In this setup, a Model 4200 Semiconductor Characterization System equipped with two SMUs and PreAmps uses one SMU to supply a constant drain-to-source voltage and measures the resulting drain current.

在此配置中，4200型半导体特性分析系统配备了2个SMU和前置放大器。使用一个SMU来提供恒定的漏-源电压，并测量产生的漏极电流。

The control signals of the PWM rectifier are obtained by comparing the current of AC side with triangular wave (or saw-tooth wave) directly, which can implement the steadiness of the voltage of DC side and unit capacity factor of the system. At the same time, harmonic component of the system is abstracted through Instant Reactive Power Method, which can be smoothed by Integrated Learning Boost Converter Control.

本文采用重复学习Boost变换技术，利用滑模变结构控制技术对单相PWM整流器恒频Boost变换进行了分析，提出将交流侧电流直接与三角波相比较得到开关控制信号的方法，实现直流电压恒定不变及系统单位功率因数；同时，利用瞬时无功功率法分析系统谐波，并在谐波域内使用重复学习的控制方法，结合Boost变换技术，有效滤除系统谐波有功电流。

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。