查询词典 instantaneous voltage

ABB's Nashville service center provides TVA with immediate access to experts on everything from transformers to high voltage circuit breakers, medium and low-voltage switchgear, and distribution protection and control systems.

ABB 的纳什维尔服务中心为 TVA 提供即时的专家服务，从变压器到高压电路断路器、中低压开关设备、输电保护以及控制系统的一切服务。

First, the design of the hardware circuit: It is mainly the interface circuit of PLC, including operation control signals of inputting part, low-voltage protection,over-voltage measure circuit , sensor input signal ,etc.

第一、硬件电路的设计：主要是PLC的接口电路，包括输入部分的运行控制信号，欠压检测、过压检测电路，传感器输入信号等等，输出部分有悬浮部分的主电路，显示电路，扩展模块以及变频器VDF—M的连接。

Voltage detection pin for 46K Ω 25 low-voltage protection.

低电压保护电压检测端子。

Ultra-temperature, ultra-current, ultra-voltage, super-speed; low oil pressure, low-voltage automatic protection system.

超水温、超电流、超电压、超转速；低油压、低电压自动保护系统。

This text has analyzed the common malfunction of the asynchronous motor at first. And then it, which is based on symmetrical weight theory, has drawn accurate criterion of the trouble of the motor, confirmed the protective measures of different troubles. Finally, it has realized kinds of protection functions, such as short-circuit protection, rotate-stop protection, over-heat protection, negative current protection, zero current protection, low-voltage protection, over-voltage protection, overlong start-up time protection, frequent start-up protection, lock protection of electric leakage and so on.

本文首先分析了异步电动机的常见故障，以对称分量法为依据，采用检测过流幅值、负序电流、零序电流的方法，得出了电动机故障的准确判据，确定了各种故障的保护措施，对电动机实现了短路、堵转、过热、负序电流、零序电流、低电压、过电压、启动时间过长、频繁启动、漏电闭锁等保护功能。

The objective of design optimization for the current loop is to maximize the cross-over frequency. The results show the stability is improved and the capability of suppressing the switching noise is far better than the original. The objective of design optimization for the voltage loop is to minimize the gain of the line ripple voltage.As a result the bandwidth minishes obviously and optimization design excelles in restraining the ripple.

主电路以总体积最小为优化目标，优化结果表明电路的体积减少了0.5%；电流环以开环穿越频率最大为目标，优化结果表明电流环的稳定性能得到了改善，开关噪声抑制能力明显优于优化前的；电压环以线纹波电压增益最小为目标，优化结果表明电压环的带宽明显减小，纹波抑制能力远远优于优化前的。

At the begin of the dissertation, control strategy is analysed for improving performances of the interver in dynamic, steady-state and minishing harmonious component of the output voltage. Firstly, the theory of the voltage differential multiloop feedback strategy is analysed .

着重于对逆变电源控制策略的研究，从控制策略的角度入手改善逆变电源的输出动态性能，提高逆变电源的稳态精度，同时改善输出电压的正弦度，减少输出电压的谐波含量。

When the operator presses the normally closed momentary-contact pushbutton switch, S1, current flows through R1 and R2 to ground, developing sufficient gate-to-source voltage to turn on Q1 and apply power to voltage regulator IC1 and the microprocessor.

当操作者按下常闭瞬时接触按钮开关S1，电流通过R1和R2流到地，不断提高栅源极电压到足够打开Q1和为IC1和微处理器供能。

When the operator presses the normally closed momentary-contact pushbutton switch, S1, current flows through R1 and R2 to gro und, developing sufficient gate-to-source voltage to turn on Q1 and apply power to voltage regulator IC1 and the microprocessor.

当操作者按下常闭瞬时接触按钮开关S1，电流通过R1和R2流到地，不断提高栅源极电压到足够打开Q1和为IC1和微处理器供能。

Frequency Synthesizer; Phase Locked Loop; Voltage Controlled Oscillator; Multiple-pass Delay Cell; Dynamic voltage-mode; Phase Interpolation; Quality Factor; Process and Temperature variation; Self-adaptive; Phase Noise; Jitter; Analog circuit

信息科技，无线电电子学，基本电子电路频率综合器；锁相环；压控振荡器；环形振荡器；多通路环延迟单元；动态电压模；相位内插；品质因子；工艺温度波动；自适应；相位噪声；抖动；模拟电路

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。