However, the waveforms of motor currents are difficult to control. The harmonic components of the current will produce torque pulsation, additional losses and some EMI problems.
电压源方式主回路比较简单，但电流波形难以控制，且谐波所带来的转矩脉动和损耗比较大，EMI问题难以解决。
参考来源 - 电流源型永磁电机控制方法仿真研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Reduced torque pulsation; Lower noise in start-up and operation process.
转矩脉动减少，起动和运行噪音更低。
In software, the method of reducing commutation torque pulsation is brought into effect.
软件设计中采用了换相转矩脉动抑制方法。
But it has the disadvantages of torque pulsation, it can't achieve accurate position and speed of higher performance.
但是无刷直流电动机运行中存在转矩脉动问题，对实现更精确的位置和更高性能的速度控制有极大影响。
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