Figure 11.1 Basic three-phase rectifier bridge in .NET

Access qr bidimensional barcode in .NET Figure 11.1 Basic three-phase rectifier bridge
Figure 11.1 Basic three-phase rectifier bridge
Visual Studio .NET qr code iso/iec18004 generator for .net
using barcode integrated for visual .net control to generate, create qr barcode image in visual .net applications.
independent of the current and should therefore play an insignificant part in the commutation process since all ,valvescommutating on the same side of the bridge suffer similar drops. Such a voltage drop is taken into account by adding it to the d.c. line resistance. The transformer windings resistance is also ignored in the development of the equations, though it should also be included to calculate the power loss.
reading qr codes for .net
Using Barcode recognizer for visual .net Control to read, scan read, scan image in visual .net applications.
(ii) The converter transformer leakage reactances as viewed from the secondary terminals are identical for the three phases, and variations of leakage reactance caused by on-load tap-changing are ignored.
Insert bar code on .net
use .net barcode implementation toembed barcode for .net
(iii) The direct current ripple is ignored, i.e. sufficient smoothing inductance is assumed on the d.c. side.
.NET Crystal bar code generating for .net
generate, create barcode none on .net projects
RECTIFICATION
Qr Bidimensional Barcode barcode library for visual c#
generate, create qr code jis x 0510 none on visual c# projects
Rectifier loads can use diode and thyristor elements in full or half-bridge configurations. In some cases the diode bridges are complemented by transformer on-load tap-changer and saturable reactor control. Saturable reactors produce the same effect as thyristor control over a limited range of delay angles. Referring to the voltage waveforms in Fig. 11.2. and using as time reference the
*;= 0
Control qr codes size with vb.net
qr codes size with visual basic
Figure 11.2 Diode rectifier waveforms: (a) alternating current in phase '& (b) common anode (ca) and cathode (cc) voltage waveform; (c) rectified voltage
EAN13 barcode library with .net
using visual .net crystal toassign ean-13 for asp.net web,windows application
instant when the phase to neutral voltage in phase b is a maximum, the commutating voltage of valve 3 can be expressed as:
Pdf417 barcode library with .net
use .net crystal barcode pdf417 generation togenerate pdf417 2d barcode in .net
eb - e, = f i a
Create 2d barcode in .net
use visual studio .net 2d matrix barcode creator toassign matrix barcode in .net
v,,,,sin
Code 128 integrating for .net
use visual studio .net code 128 code set a encoder tobuild code 128 code set b for .net
( +3)
Identcode encoder with .net
generate, create identcode none on .net projects
where a is the off-nominal tap-change position of the converter transformer. The shaded area in Fig. II.2(b) indicates the potential difference between the common cathode (cc) and common anode (ca) bridge poles for the case of uncontrolled rectification. The maximum average rectified voltage is therefore (11.2.1) 4 3 However, uncontrolled rectification is rarely used in large power conversion. Controlled rectification is achieved by phase-shifting the valve conducting periods with respect to their corresponding phase voltage waveforms. With delay angle control the average rectified voltage (shown in Fig. 11.3) is thus (11.2.2) In practice the voltage waveform is that of Fig. 11.4, where a voltage area (6A) is lost due to the reactance (X,) the a.c. system (as seen from the converter), referred of to as commutation reactance. The energy stored in this reactance has to be transferred from the outgoing to the incoming phase, and this process results in a commutation or conduction overlap angle (u). Referring to Fig. 11.4, and ignoring the effect of resistance in the commutation circuit, area 6 A can be determined as follows:
Control pdf-417 2d barcode image for .net
using barcode encoder for aspx control to generate, create barcode pdf417 image in aspx applications.
eb - e, = 2-
Excel Spreadsheets upca development on excel spreadsheets
using office excel toconnect universal product code version a in asp.net web,windows application
v, = -
Control code-39 data on excel spreadsheets
to compose code 39 and 39 barcode data, size, image with microsoft excel barcode sdk
1 ,
GS1-128 barcode library with c#
use .net for windows forms crystal ean/ucc 128 creation toattach ean / ucc - 14 on c#
X,di,
Control code 3 of 9 data for .net
39 barcode data in .net
w dt
Excel bar code implement with excel
using barcode generating for excel control to generate, create barcode image in excel applications.
(11.2.3)
Control upc - 13 size with microsoft word
ean13 size for microsoft word
Figure I13 Thyristor-controlledwaveform:(a)alternatingcurrent in phase & (b)rectified d.c. voltage waveforms
Linear Barcode barcode library in .net
use sql server reporting service linear 1d barcode writer tocompose linear barcode for .net
Figure 11.4 Effect of commutation reactance: (a) alternating current; (b) d.c. voltage waveforms
where e,, eb are the instantaneous voltages of phases a and b respectively, and i, is the incoming valve (commutating) current. Hence
(11.2.4)
Finally, by combining equations (11.2.1), (11.2.2) (11.2.4) following a.c.-d.c. and the voltage relationship is obtained:
(11.2.5)
It must be emphasised that the commutating voltage (V,,,,) is the a.c. voltage at the closest point to the converter bridge where sinusoidal waveforms can be assumed. The commutation reactance (X,) the reactance between the point at which V,,,, is exists and the bridge. Where filters are installed the filter busbar voltage can be used as V,,,. In the absence of filters, V,,,, must be established at some remote point and X, must be modified to include the system impedance from the remote point to the converter. With perfect filtering, only the fundamental component of the current waveform will appear in the a.c. system. This component is obtained from the Fourier analysis of the current waveform in Fig. 11.4,and requires information of i, and I(. Taking as a reference the instant when the line voltage (eb- e,) is zero, equation (11.2.3) be written as can fiaV,,,,sinot
= 2--