torque ripple

Then, it proposes a two-stage modulation strategy to eliminate torque ripple during motor commutation process of seven switching drive topology. Simultaneously, it uses the current predictive control to suppress LC resonance phenomenon.

并且对七管驱动方式下的换相转矩脉动提出了一种双级调制策略，同时采用电流预测控制技术有效抑制了电路的LC谐振现象。

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These analytical results show that the change of the slot width and pole pitch affect the performance of the motors greatly. It also demonstrates that skewing poles could efficiently decrease the torque ripple of PM motors.

分析结果表明，定子槽宽和极宽的变化会对电机性能产生较大影响，永磁电机采用斜极结构，可有效减小电磁转矩波动。

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Control strategy: As is known to everyone, in low-speed range ( n0.25 n N), asynchronous motor traditional direct torque control method exists some problems, for example, low frequency switch, unfixed switching frequency, torque ripple and so on.

控制策略方面：众所周知，低速范围（n0.25nN）内，异步电机的传统直接转矩控制方法存在开关频率低、开关频率不固定以及转矩脉动大的问题。

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But because of switched reluctance motor ( SRM) double convex type structure make motor in turns easy to produce great torque ripple and noise.

但由于开关磁阻电机（SRM）的双凸式结构使电机在转动时易产生极大转矩脉动、噪声。

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The typical value of torque ripple of the general switched reluctance motor is15%.

一般开关磁阻电机的典型脉动值为15%。

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Applying duty ratio control technology can effectively reduce the torque ripple.

将占空比控制技术用于直接转矩控制系统中可以有效地减小转矩脉动。

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The torque ripple arosed by the slot effect in PM motor are more significant in the low speed hub motor for electric vehicle use.

永磁电机由于齿槽效应产生的定位转矩和转矩脉动，在转速较低的轮毂电机中尤为显著。

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SR machines have a significant torque ripple, especially when operated in single-pulse voltage control mode.

SR机器有重大扭矩波纹, 特别是当经营在唯一脉冲电压控制方式.

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Aiming to minimize the torque ripple in condition of non-perfect BEMF waveform, the dissertation present a optimum current tracking control technique.

实际中一般是这两种情况都存在。针对这种反电动势波形偏离理想波形的情况，本文提出了一种最优电流跟踪法来抑制转矩脉动。

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The prototype combines the advantages such as compactness, quick response, absence of electromagnetic interference, tittle torque ripple, high torque density, direct drive without intermediate gears etc.

新型马达具有小型量轻、响应速度快、无电磁干扰、力矩波动小、高的力矩密度和输出端不需要齿轮降速机构而直接实现驱动等特点。

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Aiming at reducing the torque ripple, this paper selects the optimum control parameters on the basis of simulation results and gives the control strategy of a protype motor.

以减小转矩脉动为目标.本文根据仿真结果选择较优的控制参数，并通过拟合给出样机的控制策略；

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Analysis and Comparison of Commutation Torque Ripple of PM Brushless DC Motor on Five PWM Modes

五种PWM方式对无刷电动机换相转矩脉动的分析和比较

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The structure of similar pole and slot number can increase the winding pitch coefficient, and reduce cogging torque ripple effectively with the reasonable combination of pole number and slot number.

极槽数相近结构不仅可以提高绕组短距系数，而且极数和槽数的合理配比能够有效地削弱齿槽转矩。

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Carlson etc. Analysis of Torque Ripple due to Phase Commutation in Brushless dc Machines.

张琛.直流无刷电动机原理及应用.北京:机械工业出版社,1996.

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Through the analysis of magnitude and frequency spectrum of the magnetic field of motor, main components influencing torque ripple are found. Effective methods of suppress motor radial magnetic pull and torque ripple are proposed.

通过频率谱分析，发现了影响转矩脉动的主要频率成分，并且提出了几种有效抑制不平衡磁拉力和转矩脉动的方法。

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Torque Ripple Control for Drive-Train in Variable Speed Constant Frequency Wind Turbines

变速恒频风力发电系统传动链转矩波动控制

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Simulations and experimental results show that the system has quick response, low torque ripple and few harmonics, which makes it appropriable for ship propulsion systems.

仿真和实验结果表明，系统动态响应快，转矩脉动小，谐波含量少，低速性能良好，能够满足舰船电力推进的需要。

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This paper introduced commutation torque ripple process of brushless DC motor.

介绍了永磁无刷直流电机换相转矩脉动变化过程.

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