ac induction motor speed control circuit

Ngày tải lên: 17/12/2013, 18:06

... OF AC INDUCTION MOTORS Generally, induction motors are categorized based on the number of stator windings. They are: ã Single-phase induction motor ã Three-phase induction motor Single-Phase Induction ... Although AC induction motors are easier to design than DC motors, the speed and the torque control in various types of AC induction motors require a greater understanding of the design and the characteristics ... Microchip Technology Inc. FIGURE 9: TORQUE -SPEED CURVES OF DIFFERENT TYPES OF SINGLE-PHASE INDUCTION MOTORS THREE-PHASE AC INDUCTION MOTOR Three-phase AC induction motors are widely used in industrial...

Ngày tải lên: 25/01/2014, 13:20

Ngày tải lên: 18/12/2013, 22:06

... 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 machine. ... Gareth S Roberts 4. The Induction Machine 4.1 The fundamental operating principles for an induction motor An induction motor is an asynchronous AC (alternating current) motor. The least expensive ... to develop a control strategy for the DSP controller that controls the torque production within the induction machine. However, there is no great emphasis placed on precise torque control. ...

Ngày tải lên: 27/10/2013, 23:15

... root-locus domain. Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 24 Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System 1. Introduction This ... Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 21 Table 1. Specifications of the Honeywell 22VM51-020-5 DC Motor with Tachometer Motor Characteristics Units Values ... Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 17 Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 29 9. Testing of the...

Ngày tải lên: 25/01/2014, 13:20

... Direct Torque Control of Induction Machines,” IEEE Trans. Ind. Electron., vol. 48, pp. 1057-1064, December 2001. [10] M. Depenbrok, “Direct Self -Control (DSC) of Inverter-Fed Induction Machine”, IEEE ... closed loop control of a drive system consisting of matrix converter and induction machine. Slip control and field oriented control are the basic methods applied for closed loop control [4]. ... modern direct control methods to the system with matrix converter and induction machine. In this paper, the most important direct control methods for matrix converter and induction machine are presented to...

Ngày tải lên: 13/05/2014, 00:55

Ngày tải lên: 03/07/2014, 07:20

Ngày tải lên: 12/09/2013, 22:38

Ngày tải lên: 15/10/2013, 16:10

Ngày tải lên: 17/12/2013, 14:15

... dynamic performancecompar- ison ofthe drive during acceleration where acceleration torque is very low due to slow acceleration. The machine hasa speed- sen- sitive load torque which is evidentfrom ... 660 IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 38, NO. 3, MAY/JUNE 2002 A Neural-Network-Based Space-Vector PWM Controller for a Three-Level Voltage-Fed Inverter Induction Motor Drive Subrata ... are used to train the network by a backpropagation algorithm in the MATLAB Neural Network Toolbox. The performance of an open-loop volts/Hz speed- controlled induction motor drive has been evaluated...

Ngày tải lên: 22/12/2013, 08:16

Ngày tải lên: 28/12/2013, 22:07

... to which the active section of the EVA is attached, comprising an active section and reactive section, with built-in elastic DESPOTOVIC ´ AND STOJILJKOVIC ´ : POWER CONVERTER CONTROL CIRCUITS FOR ... amplitude of LCE dis- placement , vibratory width of LCE , actual acceler- ation amplitude , double acceleration amplitude , and calculated acceleration amplitude . The calculated accelera- tion amplitude ... records of characteristic waveforms for VCS with transistor control. (a) EVA current and EVA voltage. (b) LCE displacement, LCE accel- eration, and EVA current. Fig. 16(d). The acceleration amplitude...

Ngày tải lên: 03/01/2014, 19:16

... . 1 Speed Control TM ô SPC Gas Springs, cushioned 2486.12. FIBRO SPC Gas Springs Speed Control TM ô are designed to reduce or eliminate the sheet metal retainer bounce back which is ... caused by the increased return travel speed in high speed presses (link drive presses). SPC Gas Springs feature an integral return travel delay which reduces the speed of the gas spring to 0.4 m/s ... a soft arrival for the sheet metal retainer. Benefits of the Speed Control TM ô SPC Gas Springs, cushioned:  Prevents bounce back of sheet metal retainer.  Increased productivity through...

Ngày tải lên: 22/01/2014, 02:20

... approximately achieve the commanded speed without the use of speed feedback. The second strategy is constant slip control. In this control, the drive system is designed so as to accept a torque ... the use of induction machines in variable- speed drive systems. Several strategies will be considered herein. The first, volts-per- hertz control, is designed to accommodate variable -speed commands ... the machine and load are identical to those in the study shown in Figure 13.2-4. However, since the constant-slip control is a torque input control, a speed control is necessary for speed...

Ngày tải lên: 16/02/2014, 18:54

... torque characteristics of a series motor and the speed regulation of a shunt motor. 2. AC machines (a) Squirrel-cage induction motor AC machines are simple and sturdy. The most common machine ... start/stop control of AC drives 166 6.11 Control wiring for VSDS 169 6.12 Commissioning VSDs 170 7 Troubleshooting control circuits 173 7.1 Basic control circuits 173 7.2 Ladder logic circuits ... three-phase AC motors 68 4.3 Fundamental of single-phase AC motors 78 4.4 DC motors 81 4.5 Motor enclosures 85 4.6 Motor terminal identification and connection diagram 86 4.7 Motor rating...

Ngày tải lên: 07/03/2014, 08:20

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Ngày tải lên: 21/06/2014, 17:20

Ngày tải lên: 29/06/2014, 09:20