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首页> 外文期刊>Artificial Organs >A new technique to control brushless motor for blood pump application.
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A new technique to control brushless motor for blood pump application.

机译：控制用于血液泵应用的无刷电机的新技术。

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摘要

This article presents a back-electromotive force (BEMF)-based technique of detection for sensorless brushless direct current motor (BLDCM) drivers. The BLDCM has been chosen as the energy converter in rotary or pulsatile blood pumps that use electrical motors for pumping. However, in order to operate properly, the BLDCM driver needs to know the shaft position. Usually, that information is obtained through a set of Hall sensors assembled close to the rotor and connected to the electronic controller by wires. Sometimes, a large distance between the motor and controller makes the system susceptible to interference on the sensor signal because of winding current switching. Thus, the goal of the sensorless technique presented in this study is to avoid this problem. First, the operation of BLDCM was evaluated on the electronic simulator PSpice. Then, a BEMF detector circuitry was assembled in our laboratories. For the tests, a sensor-dependent system was assembled where the direct comparison between the Hallsensors signals and the detected signals was performed. The obtained results showed that the output sensorless detector signals are very similar to the Hall signals at speeds of more than 2500 rpm. Therefore, the sensorless technique is recommended as a responsible or redundant system to be used in rotary blood pumps.
机译：本文介绍了一种基于反电动势（BEMF）的无传感器无刷直流电动机（BLDCM）驱动器检测技术。 BLDCM已被选作使用电动泵的旋转或脉动血泵的能量转换器。但是，为了正常运行，BLDCM驱动器需要知道轴的位置。通常，该信息是通过一组霍尔传感器获得的，该霍尔传感器安装在转子附近并通过导线连接到电子控制器。有时，由于绕组电流的切换，电机和控制器之间的距离较大，使得系统容易受到传感器信号干扰的影响。因此，本研究中提出的无传感器技术的目标是避免此问题。首先，在电子模拟器PSpice上评估了BLDCM的操作。然后，在我们的实验室中组装了BEMF检测器电路。为了进行测试，组装了一个与传感器相关的系统，在其中进行了霍尔传感器信号与检测到的信号之间的直接比较。获得的结果表明，在超过2500 rpm的速度下，输出的无传感器检测器信号与霍尔信号非常相似。因此，推荐将无传感器技术用作旋转式血泵中的负责任或冗余系统。

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