scholarly journals A COMPARISON OF AN AC-SERVO MOTOR DRIVING VARIABLE ROTATIONAL SPEED AND A VARIABLE DISPLACEMENT PUMP-CONTROLLED SYSTEMS FOR VELOCITY CONTROL

2008 ◽  
Vol 2008 (7-3) ◽  
pp. 629-634 ◽  
Author(s):  
Mao-Hsiung CHIANG ◽  
Yih-Nan CHEN ◽  
Chung-Chieh CHEN
Keyword(s):  
Rotational Speed ◽  
Velocity Control ◽  
Servo Motor ◽  
Ac Servo ◽  
Controlled Systems ◽  
Displacement Pump ◽  
Variable Displacement ◽  
Ac Servo Motor

Nonlinear Discrete-time feedback error learning with PI Controller for AC servo motor

2008 ◽  
Author(s):  
Noppanan Suwanjatuporn ◽  
Mes Napaamporn ◽  
Waree Kongprawechnon ◽  
Sirisak Wongsura
Keyword(s):  
Discrete Time ◽  
Pi Controller ◽  
Servo Motor ◽  
Ac Servo ◽  
Feedback Error Learning ◽  
Feedback Error ◽  
Error Learning ◽  
Ac Servo Motor

Anti load disturbance method for AC servo motor power system

2018 ◽  
Vol 22 (S1) ◽  
pp. 2273-2283
Author(s):  
Haoliang Lv ◽  
Xiaojun Zhou
Keyword(s):  
Power System ◽  
Motor Power ◽  
Servo Motor ◽  
Ac Servo ◽  
Load Disturbance ◽  
Ac Servo Motor

Research and Implementation of Fractional Order Controller in AC Servo Motor System

2019 ◽  
Author(s):  
Xiaohong Wang ◽  
Likai Zheng ◽  
Thi Thu Giang Hoang ◽  
Zhifeng Pan ◽  
Xiaozhuang Zhou
Keyword(s):  
Fractional Order ◽  
Motor System ◽  
Servo Motor ◽  
Ac Servo ◽  
Ac Servo Motor ◽  
Fractional Order Controller

Servomechanical Press: A New Press Concept for Semisolid Forging

2008 ◽  
Vol 141-143 ◽  
pp. 261-266 ◽  
Author(s):  
Zigor Azpilgain ◽  
R. Ortubay ◽  
A. Blanco ◽  
Inaki Hurtado
Keyword(s):  
Motor Drives ◽  
Servo Motor ◽  
Forging Process ◽  
Ac Servo ◽  
Shrinkage Defects ◽  
The Press ◽  
Mechanical Press ◽  
Ac Servo Motor ◽  
The University ◽  
A356 Aluminium Alloy

Semisolid forging process requires special movement of the ram, until now only achievable with hydraulic presses. The upper die, placed on the press ram, must move fast during forming of the component in order to reduce segregation phenomena, and, once the part is shaped, the die must squeeze the material so that the contraction of the material is overcome and no shrinkage defects are formed. Traditional mechanical presses are not able to reproduce this kind of cycles, only possible with hydraulic presses. The introduction of servo motors in mechanical presses makes possible the achievement of those requirements, and, therefore, the use of these presses for the semisolid forging processes. The main characteristic of this type of machines is the elimination of the flywheel and the clutch; in the solution proposed by the press builder Fagor, the AC servo motor drives the ram of the press by using a transmission based on gears and a crank. This paper presents some of the results achieved during the semisolid forging of A356 aluminium alloy using a 400 tons Fagor servo motor driven mechanical press installed at the University of Mondragon.

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