barcode reader code in c# net rotational losses amount to 80 W in Software

Drawer QR Code ISO/IEC18004 in Software rotational losses amount to 80 W

rotational losses amount to 80 W
Scanning QR Code ISO/IEC18004 In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
QR-Code Encoder In None
Using Barcode generator for Software Control to generate, create QR-Code image in Software applications.
Analysis: The circuit model for the series machine is shown in Figure 1824 We shall
QR Decoder In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
Draw QR Code In C#
Using Barcode encoder for Visual Studio .NET Control to generate, create QR Code image in VS .NET applications.
Is Rf jX f
QR-Code Creation In VS .NET
Using Barcode generation for ASP.NET Control to generate, create QR Code image in ASP.NET applications.
Encode Quick Response Code In .NET
Using Barcode printer for Visual Studio .NET Control to generate, create QR Code image in .NET applications.
use this model with the understanding that all currents and voltages are now phasors 1 Back emf computation To determine the back emf, we need to calculate the voltage across the armature coil and subtract it from the supply voltage: Eb = VS IS (Rf + j Xf + Ra + j Xa ) = VS (IS )(Rf + j Xf + Ra + j Xa ) The impedance angle is the only unknown quantity and it may be found from the power factor: pf = cos( ) = 0912 (lagging) Thus, Eb = VS (IS )(Rf + j Xf + Ra + j Xa ) = 120 (1785 2224 )(065 + j 12 + 136 + j 16) = 7356 248 V 2 Output power calculation The total power developed by the motor is equal to the product of the back emf times the series current: Ptotal = Eb IS = 7356 1785 = 1,31315 W The mechanical (output) power of the motor is the difference between the total power and the rotational losses: Pout = Ptotal Prot = 1,31315 80 = 1,23315 W 3 Output (shaft) torque calculation The output torque is equal to the ratio of output power to shaft speed: Tout = 1,23315 W Pout = 1472 N-m = 2 800 rad/s 60 = arccos(0912) = 2422
QR-Code Maker In VB.NET
Using Barcode printer for .NET framework Control to generate, create QR Code JIS X 0510 image in Visual Studio .NET applications.
Create GTIN - 128 In None
Using Barcode maker for Software Control to generate, create GTIN - 128 image in Software applications.
Figure 1824 Equivalent circuit of a universal motor
Bar Code Maker In None
Using Barcode drawer for Software Control to generate, create bar code image in Software applications.
Code 128 Generator In None
Using Barcode printer for Software Control to generate, create Code 128A image in Software applications.
Ra + + V ~ s _ Eb
Draw Code 3 Of 9 In None
Using Barcode maker for Software Control to generate, create Code-39 image in Software applications.
Data Matrix ECC200 Encoder In None
Using Barcode drawer for Software Control to generate, create Data Matrix image in Software applications.
jX a +
Print Leitcode In None
Using Barcode maker for Software Control to generate, create Leitcode image in Software applications.
Generate Barcode In Visual Studio .NET
Using Barcode encoder for Reporting Service Control to generate, create bar code image in Reporting Service applications.
Ef ciency calculation The ef ciency of the motor is de ned as the ratio of output power to input power: = Pout 1,23315 Pout = = = 6312% Pin VS IS cos 1,9535
Barcode Creator In Objective-C
Using Barcode drawer for iPhone Control to generate, create bar code image in iPhone applications.
Bar Code Creation In Objective-C
Using Barcode generation for iPhone Control to generate, create bar code image in iPhone applications.
Comments: Note that the analysis of this machine is very similar to that of the series DC motor, except for the use of phasors It is very important to notice that in calculating the input power, one has to consider the power factor of the motor to obtain the real power
Printing Code 128B In VB.NET
Using Barcode generator for VS .NET Control to generate, create Code 128 image in Visual Studio .NET applications.
Recognize Code 128 Code Set B In Visual C#
Using Barcode recognizer for .NET Control to read, scan read, scan image in VS .NET applications.
18
Creating GS1 128 In Objective-C
Using Barcode printer for iPad Control to generate, create GS1-128 image in iPad applications.
Code39 Creator In Objective-C
Using Barcode creator for iPad Control to generate, create Code39 image in iPad applications.
Special-Purpose Electric Machines
EXAMPLE 188 Universal Motor Torque Expression
Problem
Compute an expression for the average torque generated by a universal motor, based on the circuit diagram of Figure 1824
Solution
Known Quantities: Circuit model of motor Find: Expression for average torque, Tave Assumptions: The motor operates in the linear region of the magnetization curve Analysis: With reference to 17, we know that the ux produced in a series motor by the series current iS (t) is = kS iS (t) The instantaneous torque produced by the machine is given by the expression
T (t) = kT (t)is (t) If the source waveform has period = 2 / , we can calculate the average power by integrating the instantaneous torque over one period:
2 / 2 /
Tave (t) = 2
2 kT kS iS (t
)dt = 2
2 kT kS IS (sin2 t )dt =
1 2 k T k S IS 2
where IS is the rms value of the (series) armature current
Comments: The series motor can produce a nonzero average torque when excited by an
AC current because of the quadratic nature of the instantaneous torque A PM DC machine, which has a linear torque-current relationship, would generate zero average torque if driven from an AC supply
Single-Phase Induction Motors A typical single-phase induction motor bears close resemblance to the polyphase squirrel-cage induction motor discussed in 17, the major difference being in the con guration of the stator winding A simpli ed schematic diagram of such a motor, with a single winding, is shown in Figure 1825; the winding is typically distributed around the stator so as to produce an approximately sinusoidal mmf Assume that the mmf for a practical motor can be generated so as to approximate the following function: F = Fmax cos( t) cos( m ) This function can be written as the sum of two components, as follows:
Figure 1825 Singlephase induction motor
1 F + = 2 Fmax cos( m t) 1 F = 2 Fmax cos( m + t)
Squirrelcage rotor
Stator winding
These two components may be interpreted as representing two mmf waves traveling in opposite directions around the stator Each of these mmf s produces torque
Copyright © OnBarcode.com . All rights reserved.