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JRM Vol.23 No.3 pp. 408-415
doi: 10.20965/jrm.2011.p0408
(2011)

Paper:

Evaluation of Basic Driving Characteristics and Implementation of Redundant Speed Limiting Function of a Double-Motor Driving System

Eri Watai and Seonghee Jeong

Dept. of Electro-Mechanical Engineering, Electro-Communication University, 18-8 Hatsu-cho, Neyagawa, Osaka 572-8530, Japan

Received:
September 30, 2010
Accepted:
April 13, 2011
Published:
June 20, 2011
Keywords:
double-motor driving, over-speed protection, anti-backlash, actuator module
Abstract

The final goal of this paper is to develop an actuator system with high safety and driving performance using a double-motor driving method. In order to realize the goal, firstly, the driving characteristics of the driving method is identified through several experiments. As a result of the experiments, it was clarified that the relationship between rotational speed and torque of the driving method becomes linear in case of a small offset voltage. In addition, it was verified that the motor torque generated by an offset voltage should be larger than the static friction of a gear reducer in order to reduce a backlash on the output shaft. A Safety Related Part (SRP) for the driving system is implemented to avoid an over speed. The SRP consists of two-channel safety parts capable of executing safety function to cut-off power to motors independently. Through several experiments, it was confirmed that the safety function was well conducted in case of a single failure of a sensor system.

Cite this article as:
Eri Watai and Seonghee Jeong, “Evaluation of Basic Driving Characteristics and Implementation of Redundant Speed Limiting Function of a Double-Motor Driving System,” J. Robot. Mechatron., Vol.23, No.3, pp. 408-415, 2011.
Data files:
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