软件设计中采用了换相转矩脉动抑制方法。
In software, the method of reducing commutation torque pulsation is brought into effect.
介绍了人工心脏轴流式血泵永磁无刷直流电机换相转矩脉动变化过程。
This paper introduces Commutation torque ripple process of the axial blood pump of an artificial heart brushless DC motor.
主要对永磁无刷直流电动机换相过程进行理论分析，得到引起换相转矩脉动的原因。
The cause of producing the commutation torque ripple was mainly found by means of analyzing the commutation process of permanent magnet brushless DC motor in theory.
分析了永磁无刷直流电机换相原理，提出了一种换相电流预测控制方法以抑制换相转矩脉动。
A commutation current prediction control scheme was proposed in brushless DC motor (BLDCM) to suppress the commutation torque ripples.
通过分析，在理论上得到了换相过程引起转矩脉动的主要因素，并介绍减小换相转矩脉动的方法。
By the analysis, we can obtain the phase change process to cause the torque pulsation primary factor theoretically, and introduced that reduced the phase change torque pulsation the method.
介绍了无刷直流电机控制系统中的四种PWM调制方式，详细分析了四种不同的调制方式对无刷直流电机换相转矩脉动的影响。
Four PWM modes used in the brushless DC motor control system are introduced and their different influences on the commutation torque ripple of BLDC motors are analyzed in detail.
对永磁无刷直流电机的转矩脉动的产生机理进行了分析，并根据缝纫机控制器的特点，研究了缝纫机停机过程的换相转矩脉动情况。
The reasons of the torque ripple of BLDCM are presented. A BLDCM drive system used in industrial sewing machine is studied and stop precision of the system is analyzed in detail.
分析了传统的PWM_ON调制方式对无刷直流电动机在非换相期间由于截止相的反并联二极管续流而导致转矩脉动的原因。
The torque ripple caused by diode freewheeling of the inactive phase during non-commutation state of PM brushless DC motor(BLDCM)when using the PWM_ON type of pulse width modulation was analyzed.
同时，着重对电流换相时所引起的转矩脉动进行了研究，发现采用重叠换相技术可减小这种转矩脉动。
At the same time torque pulsation in circuit commutation is analyzed and researched chiefly, and overlapping commutation technology is offered in order to reduce this torque pulsation.
本文首先从BLDCM的结构出发，介绍了其工作原理，并从理论上给出了BLDCM在电流换相过程中转矩脉动存在的必然性。
Firstly, discussion focuses on configuration of BLDCM, and its running principles as well as necessary existence of torque ripple when current commutes.
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.
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.
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