Study on the DC-Side Oscillation Mechanism Analysis and Suppression Strategy for Metro Traction Drive System

2016 ◽  
pp. 625-636
Author(s):  
Kean Liu ◽  
Hongqi Tian ◽  
Jie Zhang ◽  
Yu Zhang
Keyword(s):  
Drive System ◽  
Mechanism Analysis ◽  
Traction Drive ◽  
Oscillation Mechanism ◽  
Suppression Strategy

scholarly journals Highly efficient traction drive system with a normal force controller using a piezoelectric actuator

2017 ◽  
Vol 9 (10) ◽  
pp. 168781401772883 ◽  
Author(s):  
Rui Fukui ◽  
Taira Okabe ◽  
Masayuki Nakao ◽  
Yukihiro Honda
Keyword(s):  
Piezoelectric Actuator ◽  
Normal Force ◽  
Drive System ◽  
Traction Drive ◽  
Highly Efficient

A Self-Actuating Traction-Drive Speed Reducer

2004 ◽  
Vol 127 (4) ◽  
pp. 631-636 ◽  
Author(s):  
Donald R. Flugrad ◽  
Abir Z. Qamhiyah
Keyword(s):  
Friction Coefficient ◽  
Normal Force ◽  
Drive System ◽  
Traction Drive ◽  
Sliding Motion ◽  
Output Torque ◽  
Speed Reducer ◽  
Rolling Elements ◽  
Drive Speed ◽  
High Output

Traction-drive speed reducers offer certain advantages over geared speed reducers. In particular, they generally run quieter than geared units and provide an opportunity for higher efficiency by eliminating sliding motion between contacting elements. In order to generate a sufficiently high output torque, some means must be provided to create a normal force between the rolling elements. This normal force, along with the friction coefficient, enables the device to transmit torque from one rolling member to the next. The speed reducer proposed here is designed so that the configuration of the rolling elements creates the needed normal force in response to the torque exerted back on the system by the downstream loading. Thus the device is self-actuating. Since the normal force is only present when needed, the rolling elements of the device can readily be disengaged, thus eliminating the need for a separate clutch in the drive system. This feature can be exploited to design a transmission with several distinct speed ratios that can be engaged and disengaged in response to changing speed requirements.

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