A new type of direct-drive variable-reluctance actuators for industrial automation

2003 ◽  
Author(s):  
N.C. Cheung
Keyword(s):  
Direct Drive ◽  
Industrial Automation ◽  
Variable Reluctance ◽  
New Type

scholarly journals Overview of the Optimal Design of the Electrically Excited Doubly Salient Variable Reluctance Machine

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 228
Author(s):  
Yao Zhao ◽  
Chuanyang Lu ◽  
Dongdong Li ◽  
Xing Zhao ◽  
Fan Yang
Keyword(s):  
Optimal Design ◽  
Optimization Design ◽  
Basic Structure ◽  
Optimization Methods ◽  
Advantages And Disadvantages ◽  
Variable Reluctance ◽  
Reluctance Machine ◽  
Doubly Salient ◽  
New Type ◽  
Salient Variable

The Electrically Excited Doubly Salient Variable Reluctance Machine (EEDSVRM) is a new type of brushless machine designed according to the principle of air gap reluctance change. There is neither permanent magnet steel nor excitation winding on the rotor. The rotor is made of silicon steel sheets, thus the structure of the variable reluctance machine is very simple. There are many optimization methods for this type of machine optimal design, such as novel machine topology optimization, finite element simulation-based optimization, mathematical analysis-based optimization, intelligent algorithm-based optimization, and multiple fusion-based optimization. Firstly, this article introduces the basic structure and working principle of the EEDSVRM and analyzes both its common regularity and individual difference. Then, the different optimization design methods of EEDSVRM are reviewed, the advantages and disadvantages of the different optimization methods are summarized, and the research interests of the optimization design of variable reluctance machines in the future are prospected.

A Robotic “Jack Spring”™ for Ankle Gait Assistance

2005 ◽  
Author(s):  
Kevin W. Hollander ◽  
Thomas G. Sugar ◽  
Donald E. Herring
Keyword(s):  
Peak Power ◽  
Energy Requirements ◽  
Linear Actuator ◽  
Direct Drive ◽  
Structure Control ◽  
New Type ◽  
Power And Energy ◽  
The Ideal

A Robotic ‘Jack Spring’™ is a new type of mechanical actuator, which is based upon the concept of structure control. A Jack Spring™ mechanism is used to create an adjustable Robotic Tendon, which is a spring based linear actuator in which the properties of a spring are crucial to its successful use in gait assistance. Like its human analog, the adjustable Robotic Tendon uses its inherent elastic nature to reduce both peak power and energy requirements for its motor. In the ideal example, peak power required of the motor for ankle gait is reduced from 250W to just 81 W. In addition, ideal energy requirements are reduced from nearly 36 Joules to just 25 Joules per step. Using this approach, an initial prototype is expected to provide 100% of the power and energy neccessary for ankle gait in a compact 0.84kg package. This weight is 8 times less than that predicted for an equivalent direct drive approach.

A new type of a direct-drive valve system driven by a piezostack actuator and sliding spool

2014 ◽  
Vol 23 (7) ◽  
pp. 075002 ◽  
Author(s):  
Juncheol Jeon ◽  
Chulhee Han ◽  
Young-Min Han ◽  
Seung-Bok Choi
Keyword(s):  
Direct Drive ◽  
Valve System ◽  
New Type ◽  
Piezostack Actuator

Kinematics and Dynamics Simulation of a New Type Direct-Drive NC Turret Tool Post

2013 ◽  
Vol 325-326 ◽  
pp. 247-251
Author(s):  
Yuan Xing Dai ◽  
Tian Rui Zhang ◽  
Xue Wei Zhang ◽  
Tian Biao Yu
Keyword(s):  
Axial Load ◽  
3D Model ◽  
Dynamics Simulation ◽  
Kinematics And Dynamics ◽  
Clamping Force ◽  
Actual Situation ◽  
Direct Drive ◽  
Kinematics Simulation ◽  
Motion Process ◽  
New Type

Building 3D model for a new type direct-drive NC Turret tool post, and introduce the model into ADAMS for further kinematics and dynamics simulation. In the kinematics simulation, observing the motion process of the direct-drive NC turret tool post and plots the trajectory of moving parts to a curve. Simulate the force condition of the NC turret tool post in actual situation, calculate the axial load and verify the clamping force in dynamics simulation.

scholarly journals Comprehensive Analysis On A New Type VR-Resolver with Toroidal Windings Under Healthy and Eccentric Cases

2021 ◽  
Author(s):  
Peyman Naderi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Equivalent Circuit ◽  
Processing Time ◽  
Comprehensive Analysis ◽  
Manufacturing Tolerance ◽  
Variable Reluctance ◽  
Eccentric Rotor ◽  
Type Variable ◽  
New Type

<div>A novel analysis for a new type Variable Reluctance Resolver (VR-Resolver) with toroidal windings is presented in this work. The resolver with various windings configurations as well as different rotor structures is considered for analysis. Position error of the resolvers in both healthy and eccentric cases are studied, where the effect of the eccentricity fault is analyzed for the resolvers with various windings configuration and rotor shapes. Hence, the analysis of the manufacturing tolerance due to the eccentric rotor is obtained by several analyses. Noticing the Magnetic Equivalent Circuit (MEC) method’s flexibility as well as in regards to the analysis of the several structures, a well-known flexible MEC-based method with adjustable accuracy is considered for modeling. Hence shorter processing time and more flexibility compared to Finite-Element-Method (FEM) are needed. Finally, the effectiveness of the presented works is proved by the performed validation via both FEM and experimental results.</div>

A New Type of Servo Direct Drive Turret Punch Press

2010 ◽  
Vol 139-141 ◽  
pp. 752-757 ◽  
Author(s):  
Kai He ◽  
Jiu Hua Li ◽  
Xie Feng Ou ◽  
Ru Xu Du
Keyword(s):  
Inverse Kinematics ◽  
Static Force ◽  
Kinematics Analysis ◽  
Direct Drive ◽  
Force Analysis ◽  
Output Force ◽  
Working Capability ◽  
New Type ◽  
Production Requirement ◽  
Punch Press

A new type of servo direct drive turret punch press is presented. A servomotor to drive the eccentric-toggle mechanism is used in our design, which combines the advantages of mechanical and hydraulic turret punch press. The displacement, velocity, and acceleration of the punch are calculated, through the kinematics analysis. So, the motion of the punch is controllable through the rotation of the servomotor. Then, the inverse kinematics analysis is studied in detail, and the corresponding motion of the servomotor can be gotten, for different punch motion curves, according to the production requirement. For example, when we design a motion of the punch for a particular stamping process, the motion of servomotor can be obtained through the inverse kinematics analysis. Finally, Output force is acquired by static force analysis, which decides the working capability of the mechanism.

The Structure and Finite Element Analysis of a New Type of Maglev Wind Generator

2014 ◽  
Vol 703 ◽  
pp. 436-439
Author(s):  
Si Zeng ◽  
Yu Xin Sun ◽  
Yi Du ◽  
Huang Qiu Zhu ◽  
Xian Xing Liu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Degrees Of Freedom ◽  
Magnetic Bearing ◽  
Active Magnetic Bearing ◽  
Direct Drive ◽  
Element Analysis ◽  
Wind Generator ◽  
New Type ◽  
The Cost

Abstract. In this paper, a new type of maglev wind generator is proposed. The working principle, structure characteristics and the finite element analysis of the new maglev wind turbine are introduced. The generator consists of a 2 degrees of freedom (DOF) maglev generator and a 3 DOF hybrid magnetic bearing. An eight poles active magnetic bearing with external rotor is added into traditional direct-drive permanent magnet wind generator. The rotor ring is hollowed, which can leads to the self-decoupling for magnetic fields between power generation system and suspension system. Compared with the conventional maglev wind generator, the proposed generator not only shows the same advantages of traditional maglev wind turbines, but also improves the axial length utilization and decrease the cost of motor control.

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