1723 The machine of example 177 is being used in a

Quick Response Code Decoder In NoneUsing Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.

QR Code Maker In NoneUsing Barcode encoder for Software Control to generate, create QR-Code image in Software applications.

series connection That is, the eld coil is connected in series with the armature, as shown in Figure P1723 The machine is to be operated under the same conditions as in the previous example, that is, n = 120 rev/min, Ia = 8 A In the operating region, = kIf , and k = 200 The armature resistance is 02 , and the resistance of the eld winding is negligible a Find the number of eld winding turns necessary for full-load operation b Find the torque output for the following speeds: 1 2 n = 2n n = 3n 3 4 n = n/2 n = n/4

Recognize QR Code In NoneUsing Barcode scanner for Software Control to read, scan read, scan image in Software applications.

QR Code ISO/IEC18004 Encoder In Visual C#Using Barcode drawer for Visual Studio .NET Control to generate, create QR Code JIS X 0510 image in .NET applications.

1728 A PM DC motor with torque constant kPM is used

Paint Quick Response Code In .NET FrameworkUsing Barcode creation for ASP.NET Control to generate, create QR-Code image in ASP.NET applications.

QR Code Maker In .NETUsing Barcode drawer for VS .NET Control to generate, create QR Code ISO/IEC18004 image in .NET applications.

to power a hydraulic pump; the pump is a positive displacement type and generates a ow proportional to the pump velocity: qp = kp The uid travels

Generate QR Code JIS X 0510 In VB.NETUsing Barcode encoder for .NET Control to generate, create QR-Code image in .NET framework applications.

Draw Code128 In NoneUsing Barcode drawer for Software Control to generate, create Code 128 image in Software applications.

c Plot the speed-torque characteristic for the conditions of part b

European Article Number 13 Encoder In NoneUsing Barcode generation for Software Control to generate, create EAN-13 Supplement 5 image in Software applications.

Bar Code Maker In NoneUsing Barcode creator for Software Control to generate, create bar code image in Software applications.

Part III

Paint UPC Code In NoneUsing Barcode creation for Software Control to generate, create UPCA image in Software applications.

Code 3 Of 9 Drawer In NoneUsing Barcode generator for Software Control to generate, create Code 39 image in Software applications.

Electromechanics

EAN-8 Supplement 5 Add-On Generator In NoneUsing Barcode creation for Software Control to generate, create EAN8 image in Software applications.

Code 128A Maker In NoneUsing Barcode printer for Office Excel Control to generate, create Code 128 Code Set A image in Excel applications.

through a conduit of negligible resistance; an accumulator is included to smooth out the pulsations of the pump A hydraulic load (modelled by a uid resistance, R) is connected between the pipe and a reservoir (assumed at zero pressure) Sketch the motor-pump circuit Derive the dynamic equations for the system and determine the transfer function between motor voltage and the pressure across the load

Scan DataMatrix In Visual Basic .NETUsing Barcode scanner for .NET Control to read, scan read, scan image in VS .NET applications.

Code 39 Recognizer In NoneUsing Barcode scanner for Software Control to read, scan read, scan image in Software applications.

1729 A shunt motor in Figure P1729 is characterized

Paint UPC Symbol In NoneUsing Barcode drawer for Microsoft Excel Control to generate, create UPC-A Supplement 2 image in Excel applications.

Paint UPC-A Supplement 5 In Visual Studio .NETUsing Barcode drawer for ASP.NET Control to generate, create Universal Product Code version A image in ASP.NET applications.

by a eld coef cient kf = 12 V-s/A-rad, such that the back emf is given by the expression Eb = kf If , and the motor torque by the expression T = kf If Ia The motor drives an inertia/viscous friction load with parameters J = 08 kg-m2 and b = 06 N-m-s/rad The eld equation may be approximated by VS = Rf If The armature resistance is Ra = 075 , and the eld resistance is Rf = 60 The system is perturbed around the nominal operating point VS0 = 150 V, 0 = 200 rad/s, Ia0 = 40 A, respectively a Derive the dynamic system equations in symbolic form b Linearize the equations you obtained in part a

Matrix Barcode Generation In Visual Basic .NETUsing Barcode generation for .NET framework Control to generate, create 2D Barcode image in .NET framework applications.

Paint ECC200 In NoneUsing Barcode maker for Online Control to generate, create Data Matrix 2d barcode image in Online applications.

Armature control Assume a constant eld with Vf = 100 V; now simulate the response of the system when the armature voltage changes in step fashion from 50 V to 75 V Save and plot the current and angular speed responses Field control Assume a constant armature voltage with Va = 100 V; now simulate the response of the system when the eld voltage changes in step fashion from 75 V to 50 V This procedure is called eld weakening Save and plot the current and angular speed responses

1732 Determine the transfer functions from input

voltage to angular velocity and from load torque to angular velocity for a PM DC motor rigidly connected to an inertial load Assume resistance and inductance parameters Ra , La let the armature constant be ka Assume ideal energy conversion, so that ka = kT The motor has inertia Jm and damping coef cient bm , and is rigidly connected to an inertial load with inertia J and damping coef cient b The load torque TL acts on the load inertia to oppose the magnetic torque 1733 Assume that the coupling between the motor and the inertial load of the proceding problem is exible (eg, a long shaft) This can be modeled by adding a torsional spring between the motor inertia and the load inertia Now we can no longer lump the two inertias and damping coef cients as if they were one, but we need to write separate equations for the two inertias In total, there will be three equations in this system: 1 the motor electrical equation 2 the motor mechanical equation (Jm and Bm ) 3 the load mechanical equation (J and B) a Sketch a diagram of the system b Use free-body diagrams to write each of the two mechanical equations Set up the equations in matrix form c Compute the transfer function from input voltage to load inertia speed using the method of determinants