在核聚变实验装置中，大电流四象限运行装置将得到广泛的应用。
In the fusion device, parallel connection, four-quadrant rectifier with large current becomes more and more popular.
传统的四象限运行特性曲线的试验通过人工完成，效率低且精度差。
The traditional manual testing method is inefficient and the precision is very low.
分析了将直接转矩控制策略应用于电动机的四象限运行的具体实现方式。
Analysis the realization of the direct torque control used in asynchronous motor's four-quadrant operation.
双馈电机能够四象限运行，且可在转子侧变频控制，降低了变频器容量。
Meanwhile, By the rotor side control of doubly-fed motor, the capability of converter can be decreased largely.
介绍了四象限运行高压变频器的工作原理，并应用到煤矿副井绞车改造系统。
This paper introduces the work principle of four-quadrant operating high-pressure frequency converter, and its application in coal mine auxiliary shaft winch innovation system.
在稳态条件下，分析了电压型PWM整流器四象限运行工作原理，得出关键在于网侧电流控制的结论。
Under steady state, the four-quadrant working principle of PWM rectifier has been explained here, the key for which has been found to be ac-side current control.
本文介绍了一种新型的矩阵变换器—稀疏矩阵变换器，它具有传统的矩阵变换器的优点：四象限运行；
This paper details a novel matrix topology—Sparse Matrix Converter, it compares to matrix converter has the same advantages such as: four quadrant operation;
在分析转速、转差双闭环交流调速系统动态结构图的基础上，提出了系统的设计方法，并给出了四象限运行实验结果。
On the basis of analysis of block diagram of AC speed driver system with speed and slip ratio double closed loops, a system design method is presented with the four quadrants experiment results.
本文结合实际介绍了离心泵四象限运行特性曲线自动化试验系统的测试回路，并给出了测试系统的硬件方案和软件设计方法。
The automatic four quadrant characteristic test system of centrifugal pump was introduced, and the implementation method of the hardware and software of the test system were given.
SVG主电路结构是基于PWM变流器的拓扑结构，PWM交流器可以在四象限运行，所以SVG亦可在四象限运行，从而达到为系统提供无功功率的目的。
The main circuit configuration of SVG is based on topology configuration of PWM 4-quadrant converter, AC current of PWM converter can work in 4-quadrant, so do SVG.
系统采用软件方式实时计算交流传动系统的运行参数，包括变压器、四象限整流器、直流中间回路、逆变器、电机及负载。
Its software is designed to calculate the running parameters of the AC drive system, including transformer, quadrant rectifier, DC circuit, inverter, AC motor and train load.
本文对该系统进行了研究，并探讨了第四象限制动状态内运行等技术性能，还分析了该系统产生“失控”的原因，提出了解决的措施。
The paper goes into this system, making study of the technical behaviour of the forth quadrant braking state in operation, and analyses the cause of getting out of order, with its solution given.
引进区域房地产市场运行的四象限模型，重点分析北京房地产市场及产品细分。
Introduce four quadrant models that the regional real estate market operates, has analyzed especially the real estate market and products of Beijing subdivide.
测试结果表明，该系统在整个四象限区域内均具有良好的动态和静态运行性能。
Experimental results indicate that the designed system can provide satisfactory dynamic and static performances throughout the whole four quadrants.
测试结果表明，该系统在整个四象限区域内均具有良好的动态和静态运行性能。
Experimental results indicate that the designed system can provide satisfactory dynamic and static performances throughout the whole four quadrants.
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