barcode reader code in c# net Part III in Software

Printer Denso QR Bar Code in Software Part III

Part III
Scan Denso QR Bar Code In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
QR Code JIS X 0510 Drawer In None
Using Barcode generator for Software Control to generate, create QR Code image in Software applications.
Electromechanics
Read QR Code In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
Encoding QR In Visual C#
Using Barcode generation for .NET framework Control to generate, create QR Code image in .NET framework applications.
iB A
Draw QR Code JIS X 0510 In Visual Studio .NET
Using Barcode generator for ASP.NET Control to generate, create QR Code ISO/IEC18004 image in ASP.NET applications.
Make QR-Code In Visual Studio .NET
Using Barcode creation for Visual Studio .NET Control to generate, create QR Code ISO/IEC18004 image in VS .NET applications.
D VB C
Draw Quick Response Code In VB.NET
Using Barcode printer for .NET Control to generate, create Denso QR Bar Code image in .NET applications.
ANSI/AIM Code 128 Creation In None
Using Barcode creator for Software Control to generate, create Code-128 image in Software applications.
iA iB A 45 VB D C B D VB C B iB A
Data Matrix 2d Barcode Creator In None
Using Barcode encoder for Software Control to generate, create ECC200 image in Software applications.
Create UPC-A Supplement 2 In None
Using Barcode generation for Software Control to generate, create UPCA image in Software applications.
Figure 1812 Two-phase four-pole VR motor positioning sequence Table 184 Current excitation sequence for VR step motor SA 1 1 0 0 0 0 0 1 1 SB 0 1 1 1 0 0 0 0 0 SC 0 0 0 1 1 1 0 0 0 SD 0 0 0 0 0 1 1 1 0 Rotor position 0 45 90 135 180 225 270 315 360
Painting UPC - 13 In None
Using Barcode maker for Software Control to generate, create GS1 - 13 image in Software applications.
Printing Barcode In None
Using Barcode printer for Software Control to generate, create bar code image in Software applications.
Comments: Note that the circuit required to drive this circuit is even simpler than the
EAN - 14 Creator In None
Using Barcode creator for Software Control to generate, create Case Code image in Software applications.
Code 39 Extended Generation In None
Using Barcode generator for Microsoft Excel Control to generate, create Code 39 Extended image in Microsoft Excel applications.
one required by the PM step motor
Encode 1D Barcode In VS .NET
Using Barcode drawer for .NET framework Control to generate, create Linear 1D Barcode image in .NET applications.
GS1 DataBar Limited Creator In Java
Using Barcode generation for Java Control to generate, create GS1 RSS image in Java applications.
EXAMPLE 185 Step Angle Determination of VR Step Motor
UPC-A Creation In Objective-C
Using Barcode encoder for iPad Control to generate, create UCC - 12 image in iPad applications.
GS1 - 13 Printer In None
Using Barcode creator for Microsoft Word Control to generate, create EAN / UCC - 13 image in Office Word applications.
Problem
2D Barcode Creation In .NET Framework
Using Barcode maker for ASP.NET Control to generate, create Matrix Barcode image in ASP.NET applications.
Barcode Printer In Java
Using Barcode creation for BIRT Control to generate, create bar code image in BIRT applications.
Determine an expression for the step angle of a VR step motor based on the number of teeth on the rotor and stator and on the number of phases
Solution
Known Quantities: Number of rotor and stator teeth; number of phases
18
Special-Purpose Electric Machines
Find: Step angle
m = number of phases = 3
Schematics, Diagrams, Circuits, and Given Data: t = number of teeth = 4;
Analysis: The number of steps in a revolution, N , is given by the product of the number of teeth and the number of phases (eg, in the preceding example it is equal to 2 teeth 4 phases = 8 steps) Thus, N = tm The step angle increment, or resolution, is equal to = 360 /N For the motor described in this example,
360 360 360 = = = 10 N tm 12 3
EXAMPLE 186 Torque Equation of Step Motor
Problem
Calculate the torque generated by a step motor
Solution
Known Quantities: t = number of teeth per phase; L = axial length of rotor; g = rotor-to-stator radial air gap; r = rotor radius; F = mmf developed across the two air gaps (in series) through which a line of ux must pass in one phase Expression for the motor torque Find: Torque developed by the motor Schematics, Diagrams, Circuits, and Given Data: t = 16 (48 steps, 3-phase excitation); L = 635 10 3 m; g = 635 10 5 m; r = 129 10 2 m; F = 720 A-t
T = 0314 10 6
tL(r + g/2)F 2 g tL(r + g/2)F 2 g
Analysis: Using the expression given above gives
T = 0314 10 6 = 0314 10 6 = 337 N-m
16 635 10 3 (129 10 2 + 3175 10 5 )7202 635 10 5
From the preceding examples, you should now have a feeling for the operation of variable-reluctance and PM stepping motors The hybrid con guration is characterized by multitooth rotors that are made of magnetic materials, thus providing a variable-reluctance geometry in conjunction with a permanent-magnet rotor An ideal torque-speed characteristic for a stepper motor is shown in Figure 1813 Two distinct modes of operation are marked on the curve: the locked-step mode, and the slewing mode In the rst mode, the rotor comes to
Part III
Electromechanics
Torque
Normal mode (locked step) Slewing mode Speed
Figure 1813 Ideal torque-speed characteristic of a stepping motor
rest (or at least decelerates) between steps; this is the mode commonly used to achieve a given rotor position In the locked-step mode, the rotor can be started, stopped, and reversed The slewing mode, on the other hand, does not allow stopping or reversal of the rotor, although the rotor still advances in synchronism with the stepping sequence, as described in the preceding examples This second mode could be used, for example, in rewinding or fast-forwarding a tape drive The power supply, or driver, required by a stepping motor is shown in block diagram form in Figure 1814; it includes a DC power supply, to provide the required current to drive the motor, in addition to logic and switching circuits to provide the appropriate inputs at the right time One of the important considerations in driving a stepping motor is the excitation mode, which can be one-phase or twophase The driver is the circuit that arranges, distributes, and ampli es pulse trains from the logic circuit determining the stepping sequence; the driver excites each winding of the stepping motor at speci ed times In the one-phase excitation mode, current is supplied to one phase at a time, with the advantages of low power consumption and good step-angle accuracy Input signal pulses and the change in the condition of each phase excitation are shown in Figure 1815 In the two-phase excitation mode, current is simultaneously provided to two phases Input signal pulses and the change in the condition of each phase excitation are also shown in Figure 1816
Input pulse Phase A Phase B Phase A Phase B Input signal pulses and the change in phase excitation of the one-phase excitation mode Input pulse Phase A Phase B Phase A Phase B Input signal pulses and the change in phase excitation of the two-phase excitation mode
Copyright © OnBarcode.com . All rights reserved.