Question

求大神帮我翻译两段英语

The transient performance of the proposed control scheme has been tested with a rated load reversal at
1000 rpm and 100 rpm. As shown in Fig. 13 and Fig. 14, the input current is almost in phase with the
corresponding phase voltage during motoring operation and the phase of input current is opposite
during regenerative braking. This means that the matrix converter draws electric power to DC machine
mechanical power from the AC mains with nearly sinusoidal waveforms and unity input power factor.
When the torque is reversed, it generates power back to the mains. It is noted that both input and stator
current waveforms are sinusoidal immediately after the step command whether at a low or high speed,
under light or rated load.

This paper has presented a new DTC method for matrix converter drives using two switching
configurations at each control cycle. The two-level torque hysteresis comparator allows a reduction of
ripples in torque and currents. The proposed method makes use of two input current vector, instead of
one in original DTC, in each cycle period to improve the input current quality without any negative
effect on the motor side performance and furthermore simplify the control scheme. The input power
factor hysteresis controller, the input displacement angle estimator and the low pass filter are not
required in the new DTC scheme. The proposed DTC and original DTC have been compared by
simulations and experiments. The distortion of the input current is reduced but the output performance
is preserved without adding its complexity. Both steady state and dynamic conditions have been tested
in wide speed range with light or full load.

Answer 1

所提出的控制方案的瞬态性能进行了测试与额定负荷反转

1000转和100转。如图13和图14所示，输入电流几乎是同相位
在电动操作相应的相电压和输入电流的相位相反
再生制动过程中。这意味着矩阵变换器的直流电机的电源了
近正弦波形和单位输入功率因数AC电源的机械功率。
当力矩是相反的，它产生的电力回水管。值得注意的是，输入和定子
步骤命令无论是在低或高的速度后，立即电流波形正弦，
在光照下或额定负荷。
本文介绍了矩阵的两个开关驱动器转换器的一种新的直接转矩控制方法
在每个控制周期的配置。两转矩滞环比较器允许减少
在转矩和电流脉动。该方法利用两个输入电流矢量，而不是
一个原始的DTC，在每个循环周期来提高输入电流的质量没有任何负面的
在电机侧性能并简化控制方案的效果。输入功率
因子的滞环控制器，输入位移角估计和低通滤波器不
在新的DTC方案的要求。DTC DTC和原来相比已
仿真和实验结果。输入电流的失真降低但输出性能
保存不增加其复杂性。稳态和动态条件下进行测试
在光或全负荷调速范围宽。