speed control methods of induction motor drives

Ngày tải lên: 18/12/2013, 22:06

Ngày tải lên: 15/10/2013, 16:10

... zero speed, when, approximately 250 ms into the study, the mechanical speed command is stepped Figure 13.6-2. Torque control loop. 504 INDUCTION MOTOR DRIVES taken. Another method of controlling ... ′ =i qr e 0 . 530 INDUCTION MOTOR DRIVES Figure 13.7-1. Indirect rotor field oriented control. Figure 13.7-2. Start-up performance of indirect field oriented drive. 506 INDUCTION MOTOR DRIVES λ m /λ b ... V 0 V 7 V 0 V 7 V 0 V 7 −1 0 V 5 V 6 V 1 V 2 V 3 V 4 Figure 13.8-3. Step response of an induction motor with DTC. 520 INDUCTION MOTOR DRIVES By suitable choice of reference frame, (13.4-7) is achieved; therefore ′ λ qr e ...

Ngày tải lên: 16/02/2014, 18:54

... a control strategy that varies the frequency and voltage of the signal applied to the windings of the induction motor, while controlling the flux created in the air-gap of the induction motor. ... designed to control a brush-less DC motor. However, by constructing a feedback loop that can detect the outputs of an induction motor, we can use this motor controller to control an induction ... the induction motor s many advantages are clearly explained. Wildi also presents the two types of induction motors: “the squirrel cage induction motor and the “wound motor . An explanation of...

Ngày tải lên: 27/10/2013, 23:15

... loop control [1], [5]. Another topic of great interest is the closed loop control of a drive system consisting of matrix converter and induction machine. Slip control and field oriented control ... are the basics of Direct Torque Control, Direct Current Control and Sliding Mode Control of matrix converters. I. INTRODUCTION In recent years many research results on control methods for matrix ... basic ideas of the three control methods mentioned above will be outlined, starting with Direct Torque Control and Sliding Mode Control, as these methods use the same switch configurations of the...

Ngày tải lên: 13/05/2014, 00:55

Ngày tải lên: 17/12/2013, 14:15

Ngày tải lên: 17/12/2013, 18:06

... turn-on and turn-off characteristics of the power devices are not identical. This is one of the most critical problems in control of BLDCM drives. We can find in literature a lot of efforts to ... machine, Vector control, Pseudo-vector control, Torque ripple minimization. I. I NTRODUCTION A. Sine-wave PM Motor vs. Square-wave Motor: Vector Control vs. Phase Current Control With the ... ripple in Square-wave PM Motors (BLDC motor) . Instead of conventional square-wave form, the method uses the principle of vector control to optimally design the wave-form of reference current...

Ngày tải lên: 03/01/2014, 19:46

... angular speed ω c . Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 12 7. Control Design The objective of the exercise is to control the angular speed of the ... Furthermore, the control of AC actuators was a difficult task at that time. Today, AC motors are also widely used as servo-motors, employing modern methods of phase- voltage control and frequency control ... A schematic diagram of a DC motor is shown in Figure 6. Figure 6. Schematic Diagram of a DC Motor Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 10 ...

Ngày tải lên: 25/01/2014, 13:20

Ngày tải lên: 19/06/2014, 08:20

Ngày tải lên: 19/06/2014, 10:20

Ngày tải lên: 11/07/2014, 05:20

Ngày tải lên: 13/11/2014, 06:43

... that is, the number of ads, the length of ads and when they are put on the air. -Web papers: You probably would not have seen this means of advertising on a list of advertising methods if you had ... other methods of communication. But not who also read them , advertise by a hotel's little sum of moneys also costly email, but also isn't acquired efficiently. Because number of email plenty ... than most of major forms of advertising. However, with the increasing number of television networks and stations, businesses might find good deals for placing commercials or other forms of advertisements....

Ngày tải lên: 15/04/2013, 14:02

... 80-85. Swiss Federal Institute of Technology, Zürich University of Zürich, Swiss Banking Institute Master of Advanced Studies in Finance Master Thesis Statistical Methods of Valuation and Risk Assessment: Empirical ... ratio of 1.05 where the directional strategies exhibit a ratio of 0.75 and in the case of a minimal acceptable rate of 0% non-directional strategies exhibit on average an annualised ratio of 1.75 ... confidence intervals of the estimates are also represented by red dashed lines. 3.6.2 Graphical Analysis of Time-Varying Exposures Since a minimum number of observations, i.e. number of asset classes,...

Ngày tải lên: 16/04/2013, 20:00

Ngày tải lên: 05/10/2013, 15:15

Ngày tải lên: 14/12/2013, 12:15

... and IAS member of the Neural Network Council. He has been a Member of the Editorial Board of the P ROCEEDINGS OF THE IEEE since 1995. He was the Guest Editor of the P ROCEEDINGS OF THE IEEE “Special ... Network Toolbox. The performance of an open-loop volts/Hz speed- controlled induction motor drive has been evaluated with the ANN-based modulator and compared with that of a conventional DSP-based ... (1960–1971). He is specialized in power electronics and motor drives, specifically including power converters, ac drives, microcomputer/DSP control, EV/HV drives, and artificial intelligence applications...

Ngày tải lên: 22/12/2013, 08:16

... incredible control over the project's timeline. The first two scripting elements we'll discuss are the nextFrame() and prevFrame() methods of the MovieClip class. You use these methods ... value of "play" or "stop", the last part of the conditional statement (else) is executed. If this part of the statement is executed, the function has been passed a value of ... lines of script within the else part of the statement handle this common functionality in either case. Following that, the value of action is further evaluated. If action has a value of "ff",...

Ngày tải lên: 24/12/2013, 07:17