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A Study on the Signal Processing Method for the Hall Sensorless Position Control of ETC Control System using a BLDC Motor  

Lee, Sang-Hun (System Control Team, Mechatronics Center, Deagu Machinery Institute of Components & Materials)
Lee, Seon-Bong (Department of Mechanical & Automotive Engineering, Keimyung University)
Park, Cheol-Hu (Mechatronics Center, Deagu Machinery Institute of Components & Materials)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.16, no.5, 2008 , pp. 92-99 More about this Journal
Abstract
This paper describes an signal processing method for the hall sensorless position control of ETC control system using a BLDC motor. The proposed ETC control system, which is mainly consisted of a BLDC motor, a throttle plate, a return spring and reduction gear, has a position sensor with an analog voltage output on the throttle valve instead of BLDC motor for detecting rotor position of motor. So the additional commutation information is necessarily needed to control the mentioned ETC module. In order to estimate and determine the commutation state, it is proposed to properly manipulate the resolution of A/D converter considering the mechanical parameter, that is, the number of motor slot and the ratio of reduction gear. Through this method, the estimation of commutation state for operating the system is possible and the discrete signal for commutation is stably obtained. The validity of the method is examined through the experimental results.
Keywords
Electric throttle control; Hall sensorless control; Commutation estimation method; BLDC motor control; High-response position control;
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