基于SVM的DTC方案可以有效地减小转矩波动。
The torque ripple could be significantly reduced by SVM-based DTC scheme.
研究表明，该传动机构转矩波动很小，具有优异的传动性能。
The study shows that the magnetic gear has a very small torque fluctuation and an excellent transmission performance.
从最低转速到最高转速，伺服电机都能平滑运转，转矩波动小。
From the lowest to the highest speed, speed servo motor can smooth running, torque ripple is small.
从最低转速到最高转速，伺服电机都能平滑运转，转矩波动小。
From the lowest speed to the highest speed, servo motor can smooth running, torque ripple is small.
永磁无刷直流电机位置传感器和转矩波动的存在限制了它的应用范围。
For the being of the torque ripple and the position sensors, the application of brushless DC motors is limited.
文中提出应用傅立叶级数系数的电流控制算法，能明显减少转矩波动。
In this paper, a current control algorithm using Fourier series coefficients is proposed. This algorithm can minimize torque ripple obviously.
从而为合理选择极弧宽度，达到减少电磁转矩波动的目的提供了一种有效途径。
Thus an effective way to design the polar arc width reasonably in order to reduce torque ripple is provided.
针对采样周斯内的位置误差会引起电机额外的转矩波动，本文引入了位置预测算法。
Position prediction algorithm is introduced to compensate the position error in the sampling time, or the extra torque ripple would be produced.
缺点主要是由于转矩波动引起的振动较大，易产生噪声，进而使车辆的舒适性和平顺性降低。
But its major disadvantages are the big vibration caused by torque moment fluctuation, which leads to high noise, and further affects the comfortableness and smoothness of automobiles.
然后从理论上研究了电流传感器测量误差和非正弦磁场分布对永磁同步电机转矩波动的影响。
Then, the effects of current sensor measurement error and non-sinusoidal magnetic field distribution on motor torque fluctuation are theoretically investigated.
本文在气隙磁场解析计算的基础上，对引起永磁电机转矩波动的各个因素进行了深入的分析和计算。
The analysis of magnetic field in the gap is based on the calculation of torque ripple caused by various factors in-depth analysis and calculation.
得到了系统在不同的输入转矩波动、齿侧间隙、齿轮综合误差、激励频率和阻尼比参数下系统的全局特性。
The system's global characters are obtained under different input torque fluctuation, backlash, composite transmission error, exciting frequency and damping ratio.
永磁无刷直流电机具有结构简单、转矩大等显著优点，然而电机的换相过程会引起转矩波动增大、平均转矩下降等许多问题，随着电机速度的增加，这些问题会变得更为突出。
However some problems such as torque ripple increasing and average torque descending can be caused by phase commutation of the motor and may get even worse with the speed increasing.
它具有开关频率恒定，转矩和磁链波动小等特点。
It features in low torque ripple, low flux ripple and fixed switching frequency.
为了可靠运行，必须降低转速的波动，即必须有效抑制负载转矩脉动和电机电磁转矩脉动带来的转速波动。
In order to have a reliable operation, must reduce the speed fluctuation, namely must effectively restrain the load torque ripple and motor electromagnetic torque ripple of speed fluctuation bring.
他们也应用于无波动或最小转矩脉动领域。
They are also preferred in applications where no cogging and minimal torque ripple is important.
摘要抽油机中载荷变化大，易引起电动机转速和转矩的波动。
This paper mainly focuses on the fluctuation of velocity and torque of the electromotor because of the variational load in the pumping unit equipment.
仿真结果表明，系统等效转动惯量和等效阻尼系数的变化以及负载压力和加载转矩的波动干扰，对系统控制性能的影响较大。
Simulation results reveal that equivalent rotational inertia, damping factor, fluctuating loading pressure and loading torque has comparatively large influence on control properties.
对绕组换相时电流波动进行了分析，并计算了电机电磁转矩，给出了抑制电磁转矩脉动的方法。
Current fluctuation is analyzed during coil commutation time and electromagnetic torque is computed and method is given to restrain ripple of electromagnetic torque.
负载压力波动、加载转矩和转速的波动，主要影响系统的稳态性能。
While the load pressure fluctuation, the load torque fluctuation and the rotational speed fluctuation mainly affect the steady performance of the system.
转矩与转速波动的频率相等，波动的幅值随转子绕组故障严重程度增加而增加；
Simulation and computation results show that the rotor winding faults will cause electromagnetic torque and rotating speed to fluctuate;
转矩与转速波动的频率相等，波动的幅值随转子绕组故障严重程度增加而增加；
Simulation and computation results show that the rotor winding faults will cause electromagnetic torque and rotating speed to fluctuate;
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