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http://dx.doi.org/10.5762/KAIS.2020.21.10.581

A Brake Pad Wear Compensation Method and Performance Evaluation for ElectroMechanical Brake  

Baek, Seung-Koo (Advanced Railroad Vehicle Division, Korea Railroad Research Institute)
Oh, Hyuck-Keun (Advanced Railroad Vehicle Division, Korea Railroad Research Institute)
Park, Choon-Soo (Advanced Railroad Vehicle Division, Korea Railroad Research Institute)
Kim, Seog-Won (Advanced Railroad Vehicle Division, Korea Railroad Research Institute)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.21, no.10, 2020 , pp. 581-588 More about this Journal
Abstract
This study examined a brake pad wear compensation method for an Electro-Mechanical Brake (EMB) using the braking test device. A three-phase Interior Permanent Magnet Synchronous Motor (IPMSM) was applied to drive the actuator of an EMB. Current control, speed control, and position control were used to control the clamping force of the EMB. The wear compensation method was performed using a software algorithm that updates the motor model equation by comparing the motor output torque current with a reference current. In addition, a simple first-order motor model equation was applied to estimate the output clamping force. The operation time to the maximum clamping force increased within 0.1 seconds compared to the brake pad in its initial condition. The experiment verified that the reference operating time was within 0.5 seconds, and the maximum value of the clamping force was satisfied under the wear condition. The wear compensation method based on the software algorithm in this paper can be performed in the pre-departure test of rolling stock.
Keywords
Wear Compensation; Electro-Mechanical-Brake; Brake-By-Wire; Force Estimation; Maximum Torque Per Ampere; Interior-Permanent-Magnet-Synchronous-Motor;
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