ac induction motor speed control pdf

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: • Single-phase induction motor • 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: 29/06/2014, 09:20

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

Ngày tải lên: 13/05/2014, 00:55

Ngày tải lên: 15/10/2013, 16:10

Ngày tải lên: 13/12/2013, 01:16

Ngày tải lên: 14/12/2013, 12:15

Ngày tải lên: 14/12/2013, 12:15

Ngày tải lên: 14/12/2013, 12:15

Ngày tải lên: 14/12/2013, 12:15

... ứng của UAC Notifications level 2 - Logon QuanLy Æ điều chỉnh UAC Notifications ở Level 2 - Logon Teo - Start Æ Control Panel Æ User Accounts and Family Safety Æ Add or Remove user accounts ... đổi thông số UAC - Enable built-in Administrator Æ Log on Administrator - Start Æ Control Panel Æ System and Security - Trong phần Action Center Æ Chọn Change User Account Control settings ... WINDOWS 7 USER ACCOUNT CONTROL I. GIỚI THIỆU Bài lab triển khai trên một máy Windows 7 với mục tiêu khảo sát và thử nghiệm một số thông số liên quan đến cơ chế User Account Control (UAC) Các...

Ngày tải lên: 17/12/2013, 11:15

Ngày tải lên: 17/12/2013, 14:15

... have access to pertinent background information upon which to base their review and approval. Where practicable, the nature of the change shall be identified in the document or appropriate attachments. A ... method keeps a running history of the changes to each document. There will be lots of times where you will be referring back to when a certain change took place. The initial release will be ‘A’ and the ... is needed, contact engineering for an extension. Approved Conditionally Approved (See attached comments.) Not Approved, explain. Reviewer Signature:  Date: Distribution:  Engineering: Manufacturing: Quality: Form...

Ngày tải lên: 20/12/2013, 19:15

... II. Delegate Control Mục đích: Trong mô hình OU này ta phân quyền như sau: - User KT1 có quyền quản lý user accounts trong OU Ketoan - User NS1 có quyền quản lý users accounts và Groups ... quyền Full Control trên các OU “NHATNGHE, Ketoan, Nhansu” B1: Logon Administrator → Start → Programs → Administrative Tools → AD → Click chuột phải trên OU NHATNGHE → chọn Delegate Control ... lý các users accounts các groups trong OU “Nhansu” B1: Logon Administrator → Start → Programs → Administrative Tools → AD → Click chuột phải trên OU Nhansu → chọn Delegate Control → Trong...

Ngày tải lên: 20/12/2013, 20:16

... 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 ... with 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

... abbreviation for supervisory control and data acquisition. SCADA systems integrate the data acquisition and system monitoring and control activities using graph- ical software packages. A SCADA system ... distributed control is more widely used. A distributed control system (DCS) consists of a number of computers installed at different locations, each performing an independent control action. Distributed ... direct digital control (DDC). In a DDC application the computer is used only to carry out the control action for the plant. It is also possible to add some level of supervisory control action to a...

Ngày tải lên: 22/12/2013, 21:15