电压

MSP430F169 microcontroller was the core components of control and measurement function of an electromagnetic relay characteristic parameter tester. The tester also included DC power module, power amplifier module, constant current source module, keys, and digital tube display module. The tester could test the data of 943-1C-12DS electromagnetic relays including the minimum pull-in voltage, maximum release voltage, relay coil voltage rating when the pull-contact time, release time as well as the contact value of the contact resistance. The system could complete automatic measurement parameters to achieve all the basic requirements of design. And all of the test data was displayed through the 74HC573 digital tube.

摘 要：以MSP430F169单片机作为控制和测量的核心部件，辅以直流稳压电源模块、功率放大电路模块、恒流源模块、按键和数码管显示模块等组成一个电磁式继电器特性参数测试仪，完成对943-1C-12DS电磁式继电器最小吸合电压、最大释放电压、继电器线圈电压为额定值时的触点吸合时间、释放时间以及触点接触电阻值的测试，该系统能够实现成套参数自动测量，所有测试数据通过74HC573数码管进行显示。

The resistance of the coil and the amp-turns requirement also determine the pull-in, hold, and drop-out voltages.

线圈的电阻和安匝要求还决定了吸合电压、保持电压和释放电压。

Phase comparison of resistive current component can ob- tain rather high measuring accuracy of resistive current,but for it a reference voltage shall be taken from service site(from potential transformer or adaptor),which may effect the service reliability for oth- er installations .

阻性电流相位比较法能获得较高的阻性泄漏电流测量精度，但需要从运行的现场取一个电压参考量(电压互感器或传感器电压抽取装置)，会对系统其他设备的运行可靠性造成一定的影响。

The principle of Dynamic Voltage Restorer is to ensure the customer's power quality with a series voltage source.

摘 要：动态电压恢复器通过向配电系统中串入一个电压源来保障用户端的电压质量。

This invention concerns a current control process for a feed-in voltage converter, wherein a detected flux-inducing current component and a detected torque-inducing currrent component of an actual currrent vector of a rotating field machine are each controlled for a flux-inducing current component set value and a torque-inducing current component set value of the rotating field machine. To that effect, a control set-value (DELTA u*sp, DELTA u*sq) is determined, dependent each time upon a determined current component control deviation. From these, current components of an actual current vector are formed each time by overlay of a formed pilot value (u*spvor, u*sqvor). This invention also concerns a device for carrying out this process.

本发明涉及一种用于馈入电压式变流器的电流调节方法，其中分别将所检测的一感应式电机的一实际电流向量（i s 的磁通感应电流分量和一转矩感应电流分量i sq ）调节至该感应式电机的一额定电流向量的一磁通感应分量额定值和一转矩感应电流分量额定值，在这种情况下，分别根据所检测的一电流分量调节偏差计算出一调节器调节量（△u * sp ，△u * sq ），由这两个调节器调节量分别通过叠加所形成的一预控制量（u * spvor ，u * sqvor ）形成一额定电压向量的电压分量（u * sp ，u * sq ），本发明还涉及一种用于实施该方法的装置。

In order to realize real-time control, the paper studied two kinds of closed-loop control structures such as based on scalar quantity and double closed-loop control structure, moreover established their control structure, then simulation to the double closed-loop control structure of voltage source type matrix converter. The simulation results indicate that reach the real-time control requests, the system dynamic response performance is good, the converter input output can be adjusted in the short time.

为实现电压源型阵变换器的实时控制要求，论文对基于标量控制和双闭环的两种电压源型矩阵变换器闭环控制结构进行了研究，分别建立了这两种闭环控制的控制结构，并且对电压源型矩阵变换器的双闭环控制结构进行仿真，仿真结果表明达到了实时控制的要求，系统的动态响应性能好，变换器的输入输出能在较短的时间内达到调节。

When the armature is in the middle, the two secondary coil electromotive force generated by the same sensor, so that output voltage of 0; when the armature movement in the internal coil and off-center position, the two-coil inductive electromotive force generated ranges, and voltage output, voltage depends on its size of displacement.

当衔铁处于中间位置时，两个次级线圈产生的感应电动势相等，这样输出电压为0；当衔铁在线圈内部移动并偏离中心位置时，两个线圈产生的感应电动势不等，有电压输出，其电压大小取决于位移量的大小。

There are some problems about the secondary voltage switching between voltage transformers of double bus.

针对双母线电压互感器二次电压切换存在的问题，提出了电压软切换的新方法。

One disadvantage of this method of stabilization is the additional output noise and offset voltage caused by increased amplification of input-referred voltage noise and input offset voltage.

这种稳定方法的一个不足是：输入端的有关电压噪声和失调电压增大会额外地增加输出噪声和失调电压。

The effects of the starting and ending resistance change on core voltage and the change relation of core voltage with cable length are also researched.

研究了皮电流波形对芯电压的影响、电缆始末端电阻变化对芯电压的影响以及芯电压随电缆长度的变化关系。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。