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首页> 外文期刊>IEEE Transactions on Industry Applications >An Improved Microcontroller-Based Sensorless Brushless DC (BLDC) Motor Drive for Automotive Applications
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An Improved Microcontroller-Based Sensorless Brushless DC (BLDC) Motor Drive for Automotive Applications

机译：改进的基于微控制器的无传感器无刷直流（BLDC）电机驱动器，用于汽车应用

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摘要

The direct back-electromotive-force (EMF) detection method previously described in a sensorless brushless dc (BLDC) motor-drive system (Proc. IEEE APEC, 2002, pp. 33–38) synchronously samples the motor back EMF during the pulsewidth-modulation (PWM) off time without the need to sense or reconstruct the motor neutral. Since this direct back-EMF-sensing scheme requires a minimum PWM off time to sample the back-EMF signal, the duty cycle is limited to something less than 100%. In this paper, an improved direct back-EMF detection scheme that samples the motor back EMF synchronously during either the PWM on time or the PWM off time is proposed to overcome the problem. In this paper, some techniques for automotive applications, such as motor-rotation detection, and current sensing are proposed as well. Experimental results are presented.
机译：先前在无传感器无刷直流（BLDC）电机驱动系统（Proc。IEEE APEC，2002，第33-38页）中描述的直接反电动势（EMF）检测方法在脉宽检测期间同步采样电机反电动势。调制（PWM）关断时间，而无需检测或重建电动机空挡。由于这种直接的反电动势感应方案需要最少的PWM关闭时间来采样反电动势信号，因此占空比被限制为小于100％。在本文中，提出了一种改进的直接反电动势检测方案，该方案可以在PWM开启时间或PWM关闭时间期间对电动机反电动势进行同步采样，以解决该问题。在本文中，还提出了一些汽车应用技术，例如电动机旋转检测和电流感测。给出实验结果。

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