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Title: Dual closed loop controller of bus stepper motor based on back-EMF
Authors: Liu, Junfeng
Cheng, K. W. Eric
To, Sandy
Subjects: Automobile lamp
Traffic safety
Dual closed loop algorithm
Stepper motor control
Issue Date: 2009
Publisher: Power Electronics Research Centre, The Hong Kong Polytechnic University
Source: PESA 2009 : International Conference on Power Electronic Systems and Applications : 20th-22nd May 2009, p. [1-5].
Abstract: With the ever-increasing requirement of safety for vehicle, the adaptive headlamp concept is put forward. The cost and maturity level for adaptive headlamp still are the most important matter. In this research, a new senseless dual closed loop stepper motor control algorithm is presented to solve the velocity, torque, cost and position precision issues in adaptive headlamp system, which includes the stall detection and back-EMF measurement for feedback. The position loop with stall detection and compensation based on Back-EMF is presented to avoid step loose caused by disturbance, when the disturbance appear which increases the robust of operation; the current loop with variable parameters Fuzzy logic is proposed to modify the current in coil to cope with the potential load variation. The compensation of load variation makes stepper motor smaller and cheaper. The simulation result shows that dual closed loop algorithm can enhances the system’s robustness and application scope of stepper motor.
Rights: Copyright © The Hong Kong Polytechnic University 2009.
Type: Conference Paper
ISBN: 978-988-17471-3-6
Appears in Collections:EE Conference Papers & Presentations
ISE Conference Papers & Presentations

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