ac motor speed control using power triac with display unit circuit
Tài liệu tiếng anh Điện tử công suất mạch MERS Series connected power flow control using magnetic energy recovery switch
Ngày tải lên: 15/10/2013, 16:12
systems with hysteresis. analysis_ identification and control using the bouc–wen model
Ngày tải lên: 12/12/2013, 22:41
Tài liệu Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System ppt
... 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 Parameter ... pulse-width-modulated (PWM) power amplifier. Motor speed is measured using an analog tachometer. Figure 2. Physical System Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System ... DC Motor with Tachometer. The factory specifications are shown in Table 1. Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 8 In the early days of analog control, ...
Ngày tải lên: 25/01/2014, 13:20
Understanding and using english grammar (with answer key)
Ngày tải lên: 19/08/2013, 13:41
iec 60502-1 power cables with extruded insulation and their accessories for rated voltages
Ngày tải lên: 25/12/2013, 11:08
Tài liệu Using a Transaction with a DataAdapter pptx
... the transaction. SqlTransaction tran = null; tran = conn.BeginTransaction( ); [ Team LiB ] Recipe 6.5 Using a Transaction with a DataAdapter Problem You need to use a transaction when ... Example 6-7. File: TransactionDataAdapter.cs // Namespaces, variables, and constants using System; using System.Configuration; using System.Windows.Forms; using System.Data; using System.Data.SqlClient; ... form. Update Button.Click Creates a new Transaction object on the Connection of the SelectCommand of the DataAdapter. The Transaction is associated with the Connection objects for the update...
Ngày tải lên: 21/01/2014, 11:20
Tài liệu Speed Control SPC GAS SPRINGS, cushioned pptx
... . 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 ... replace all gas springs with SPC gas springs Option 2 – corner solution (see below) SPC 2480.12./13. or 2484.12./13. LCF SPC Braking distance (~ 30 mm) *At room temperature with free airow Speed ... unit of time stroke in mm time in s sheet metal retainer without SPC sheet metal retainer with SPC SPC reduces speed to 0.4 m/s press speed 1.0 m/s Strokes per minute, depending on stroke travel,...
Ngày tải lên: 22/01/2014, 02:20
Tài liệu Using Adverb Clauses with Time pptx
... Using Adverb Clauses with Time Expressions The first page focuses on adverb clauses which are often called ... mean 'each time something happens'. We use the simple present (or the simple past in the past) because 'whenever' and 'every time' express habitual action. The ... that time, etc.'. Notice the different tenses used in relationship to the clause beginning with when. It is important to remember that 'when' takes either the simple past OR the...
Ngày tải lên: 25/01/2014, 16:20
Chapter 14 permanent magnet AC motor drives
... used with PMAMs with either sinusoidal or nonsinusoidal back emf waveforms. Machines with sinusoidal back emfs may be controlled so as to achieve nearly con- stant torque; however, machines with ... structure of the controls Figure 14.1-1. Permanent-magnet ac motor drive. Electrical System Command Signal Power Converter Control PM AM Mechanical System Sensors 566 PERMANENT-MAGNET AC MOTOR DRIVES ... machine current, the torque may be controlled with the same band- width as to which the stator currents are controlled. In fact, it is often the case that for practical purposes, the torque control...
Ngày tải lên: 16/02/2014, 18:54
Tài liệu Báo cáo khoa học: "Supervised Grammar Induction using Training Data with Limited Constituent Information *" docx
... sentences labeled with higher-level constituent brackets, a directly in- duced grammar parses test sentences with 66% accuracy, whereas an adapted grammar parses with 91% accuracy, which is only ... WSJ sentences labeled with higher-level constituent brackets, a directly induced grammar parses with 70% accuracy, whereas an adapted grammar parses with 72% accuracy, which is 6% lower than ... directly induced grammar parses with 49.8% accuracy. SV~e have not experimented with training sets con- taining only verb phrases labels (i.e., setting a pair of bracket around the head verb and...
Ngày tải lên: 20/02/2014, 19:20
control in power electronic
... 2, with two triacs conducting; and (3) Mode 3, with none or two triacs conducting. The output voltage waveforms are complicated, as illustrated in Fig. 1.27 for voltage v a of a controller with ... components involved. In practice, PWM rectifiers are typically of low and medium power ratings. 1.3 AC TO AC CONVERTERS There are three basic types of ac to dc converters. The simplest ones, the ac voltage controllers, allow ... v AB =2, and v AC =2 voltages. The envelope of control characteristics of the controller is shown in Fig. 1.28. Four other topologies of the phase-controlled three-phase ac voltage controller are...
Ngày tải lên: 05/03/2014, 09:43
Pragmatic Version Control Using CVS pptx
... project, and then see how a version control system can help. How does version control work in practice? Let’s start with a small story. . . . 1.1 Version Control in Action Fred rolls into the office ... mis- take will be. Pragmatic Version Control shows you how to use version control systems effectively, with all the benefits and safety but without crippling bureaucracy or lengthy, tedious procedures. ... volume, Pragmatic Version Control, describes how to use version control as the cornerstone of a project. A project with- out version control is like a word processor without an UNDO button: the...
Ngày tải lên: 15/03/2014, 10:20
Pragmatic Version Control Using Git pot
... Control Using Git Pragmatic Version Control Using Git is an excellent guide to getting you started with Git. It will teach you not only how to get yourself started but also how to cooperate with ... up-to-date package. Installing on OS X If Mac OS X is more your style and you want to use a package manager, M acPorts keeps its copy of Git relatively current. To install Git using MacPorts, use ... TING TO WO RK WITH A PROJECT 40 3 . 3 Starting to Work with a Project Now you have our repository in place, and you’re already tracking your first file. Next up you have to start dealing with changes. The...
Ngày tải lên: 15/03/2014, 10:20
Pragmatic Version Control using Subversion pot
... Wilma dealt with a number of project emergencies without experiencing th e panic that so often characterizes our response to the unexpected. Using version control gave Fred and Wilma the control ... check them out using that same tag. VERSION CONTROL IN ACTION 2 ã A version control system allows you to support multiple releases of your software at the same time as you con- tinue with the main ... artifact may take hours to create. In these cases, it makes sense to store the generated artifacts in the repository. The developer with the tool’s license can create the file, or a fast machine...
Ngày tải lên: 15/03/2014, 10:20
Control in Power Electronics Selected Problems docx
... Analogously to the single-phase ac chopper in Fig. 1.31, three-phase ac choppers can be obtained from their phase-controlled counterparts by replacing each triac with a fully controlled bidirectional ... ac voltage controller. FIGURE 1.27 Waveform of the output voltage in a fully controlled three-phase ac voltage controller (resistive load, firing angle of 30 ). 1.3 AC TO AC CONVERTERS 19 CONTROL ... State 0. Figure 1.4 shows the generic power converter operating as an ac voltage controller (ac to ac converter). For 50% of each half-cycle, State 1 is replaced with State 0, resulting in significant...
Ngày tải lên: 16/03/2014, 08:20