An improved microcontroller-based sensorless brushless DC (BLDC) motor drive for automotive applications

被引：0
|
作者：
Shao, JW [1 ]
机构：
[1] STMicroelect, Power Syst Applicat Lab, Schaumburg, IL 60173 USA
来源：
CONFERENCE RECORD OF THE 2005 IEEE INDUSTRY APPLICATIONS CONFERENCE, VOLS 1-4 | 2005年
关键词：
sensorless BLDC; back EMF detection; motor rotation detection; current sensing;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The direct back EMF detection method previously described in a sensorless BLDC motor drive system [5] synchronously samples the motor back EMF during the PWM off time without the need to sense or re-construct 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 the paper, an improved direct back EMF detection scheme which 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.
引用
收藏
页码：2512 / 2517
页数：6
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