Highly efficient traction drive system with a normal force controller using a piezoelectric actuator. (October 2017)

• Record Type: Journal Article
• Authors: Fukui, Rui; Okabe, Taira; Nakao, Masayuki; Honda, Yukihiro
• Is Part Of: Advances in mechanical engineering. Volume 9:Number 10(2017:Oct.)
• Publication Date: 2017-10
• Subjects: Traction drive -- electric vehicle -- motor reducer -- two-roller testing machine; Mechanical engineering -- Periodicals; 621.05
• DOI: 10.1177/1687814017728836
• Languages: English
• ISSNs: 1687-8132

Abstract

Traction drive is a useful power transmission method for reducing noise of high-rotational-speed motors of electric vehicles. To realize a highly efficient traction drive system, normal force between rollers must be optimized. This study uses a piezoelectric actuator to adjust the normal force. A piezoelectric actuator, which deforms according to the applied voltage, can output large force. Nevertheless, piezoelectric actuator cannot be integrated with a force sensor that has low stiffness. Therefore, we have developed a normal force control method that observes the slip between rollers rather than the normal force. A two-roller test bench has been developed to confirm its efficiency. Experimentally obtained results demonstrate that the proposed system can achieve considerably high efficiency.