逆电流

Based on the duality principle, the thesis proposes the novel current-fed Z-source inverter.

和电压型电路一样，本文也对电流型Z源逆变器进行了相应的分析和讨论。

Keywords soft-switch invert spot w elding ;microprocessot;UC3879;current feedback

软开关逆变点焊；单片机；UC3879；电流反馈

In this problem, the main difficulty is that the variation of border electric potential is not sensitive to the variation of conductivity in the field. So far, there is not an effective method to solve the problem.

在低频电流场逆问题的计算中，最大的问题在于边界电位值的变化对场域内部电导率的变化不敏感，到目前为此，对此问题还没有一个公认的有效的解决办法。

However, this modulation mode would not prevent the injection of DC current into the grid.

在双极性脉宽调制方式下，全桥逆变器的共模电压恒定，不产生共模电流。

The DC/AC inverter performs MPPT and delivers low distortion output current to the grid.

直流/交流逆变器演奏的MPPT和提供低失真的输出电流，以网格。

The instantaneous voltage PID control inverter has advantage on circuit and cost, compared with voltage current dual-loop control inverter.

逆变器瞬时电压PID控制与电压电流双环控制相比，在电路结构、成本等方面更具优越性。

In actuates the source specially as the equipment in the motor control, can supply the demand through the invertor the voltage and the electric current, but controls the rotational speed and the driving torque freely.

特别在作为设备驱动源的电动机控制中，通过逆变器能够供给需求的电压和电流，可自由地控制转速和驱动转矩。

Hysteretic-current-loop PWM invertor is its main circuit.

转速闭环采用带限幅的PI调节器，主电路采用电流滞环控制PWM逆变器。

Here we improved the traditional genetic operators by importing the rule of logical operation.

摘 要：采用了基于静止坐标系的速度观测器，并根据电流型逆变器的特点提出一种只需电压传感器即可实现转速估算的方案。

A new type of split-control three-phase 5-level CSI is proposed in this paper The inverter is decoupled by the neutral line of the loads.

文中提出了一类新的三相分相控制式电流型5电平逆变器拓扑。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。