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Switching Power Supply with the traditional distinction between :(1) not only the output voltage feedback, feedback from the average input current;(2) Current benchmarks signal voltage error signal and full-wave rectifier voltage signal sampling the product.

与传统开关电源的区别是:不仅反馈输出电压,还反馈输入平均电流;(2)电流环基准信号为电压环误差信号与全波整流电压取样信号之乘积。

Current tuning is introduced, and the speed open-loop transfer function is established based on current closed-loop. A mathematical inequation about the speed open-loop transfer function is deduced, then the measured amplitude-frequency data is introduced in the inequation, thus the mathematic expressions about moment of inertia and mechanism time constant are obtained.

引入了电流校正环节,建立了基于电流闭环的速度开环传递函数,推导了关于该速度开环传递函数的数学不等式,再将实际测得的幅频特性代入此不等式中,得到了关于转动惯量和机械时间常数的数学表达式。

Aiming at the limitations currently existing in controlling mine excavator with magnetic triggers,such as slow dynamic response of system,poor dynamic index and excavator characteristics,as well as complicated structure,etc.,the strategy of double closed-loop excitation electric adjustment,i.e.current inner loop and voltage outer loop,is adopted to design an advanced electronic integrated control system for mine excavator.

目前矿用电铲常见的是采用磁性触发器进行控制,存在系统动态响应慢、动态指标欠佳、电铲特性不理想、结构复杂等缺陷,采用电流内环和电压外环的双闭环励磁电调方案,设计了一种先进的电子集成电铲电控系统,详细介绍了系统电路结构,尤其是电压、电流调节器及其反馈电路与特性适配电路的基本原理和功能特点。

Then can weld starting the resistance directly on the rotor winding, and cancel collecting the electric ring and electric brush.

将定子一种极数的磁场感应于转子绕组中的电流,通过集电环和电刷,但由另一种极数的磁场感应的电流,却自动流经另一闭合回路,而不通过集电环和电刷:于是,如果后一种极数是电动机的工作基波磁场,而把前一种极数作为用以起动的谐波磁场,则可以把起动电阻直接焊接在转子绕组上,而把集电环和电刷取消,从而出现了转子电路上无集电环、无电刷、无触点的谐波起动绕线型感应电动机。

For the direct current decouple controller, the P1 adjustor抯 parameter of current and voltage loop抯 is designed. The correction of the designed parameter is testified by simulating on two phase synchronization coordinate and three phase stationary coordinate, the simulation wave is given.

对直接电流解耦控制器的电流环和电压环的PI调节器参数进行了设计,并通过在两相同步坐标系与三相静态坐标系的仿真验证了设计参数的正确性,同时也验证了直接电流解耦控制方案的可行性,给出了仿真波形。

The dissertation focuses on reviewing the proposed different hysteretic damping force versus velocity models of the MRD, and further proposes a generalized model which decouples the current control dependence on magnetic field and the hysteron dependence on exciting nature and is easy to derive the inverse model.

论文在综合分析国内外学者提出的MRD各种滞环阻尼力-速度特性模型基础上,提出了MRD的依赖于直流磁场的电流控制特性和依赖于激励性质的滞环算子可分离的半主动控制特性,建立了相应的电流控制与滞环特性相分离的一般化模型,且易于求解其逆模型。

This paper proposes a novel current control stratege to avoid this unstable. The grid current feedback is used controlled the power factor expediently, and a second differential link of grid current is designed to stabilize the system.

本文采用了一种新型的电流内环控制策略,该策略采取了电网侧电流反馈控制,能够方便的控制功率因数,在电流内环引入了电网电流二次微分来解决不稳定的问题。

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。

It is worth to be noted that the needed driving current to the MR valve with both annular and radial damping gaps is less than that to the MR valve with annular damping gaps under the cut-off state of the MR valves, which show that the MR valve with both annular and radial damping gaps consumes less energy.

测试结果显示:(1)在相同的工作条件下,同时具有圆环和圆盘阻尼间隙的磁流变阀产生的压降更明显;(2)处于截止状态时,同时具有圆环和圆盘阻尼间隙的磁流变阀的激励电流明显小于具有圆环阻尼间隙的磁流变阀的激励电流,因此采用同时具有圆环和圆盘阻尼间隙的磁流变阀可以节约能量的消耗。

To solve the above problems, a novel resonance injection type hybrid active power filter is presented, it allows the energy exchange between the DC-side capacitor and grid, DC-side voltage will be stabilized after the proposed control method base on the regulation of reactive current is adapted. On the other hand, a new current control method is proposed which is based on the control of error between injection current and harmonic current compensated by passive power filter using recursive PI.

在此基础上结合提出的基于基波无功电流闭环调节的直流侧电压控制方法,保证了直流侧电压的稳定;提出了采用递推积分将无源滤波器作用后电网谐波电流与注入支路补偿电流进行闭环比较控制以获得参考电流的方法,减小了误差,提高了系统的控制精度。

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Lao Qiu is the Chairman of China Qiuyang Translation Group and the head master of the Confucius School. He has committed himself to the research and promotion of the classics of China.

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