0195136047.pdf

814 BASIC CONTROL SYSTEMS Position control Variable resistance Potentiometer arm Computer dc source Data inputs: Dc source Dc mo ...

16.5 PRACTICAL APPLICATION: A CASE STUDY 815 Basic notions of power semiconductor devices and analysis of power electronic circ ...

816 BASIC CONTROL SYSTEMS feed the information to the microcomputer. Actuators and sensors may be either analog or digital. Digi ...

PROBLEMS 817 t = 0 (a) VS Dm if R L + − S Di (b) VS + + − − − + S D i 1 v 1 N 1 : N 2 v 2 i 2 Figure P16.1.2(a)Diode circuit wit ...

818 BASIC CONTROL SYSTEMS vp + − + − vs vs Vm Ia −Vm −Ia π π 2 π 2 π ωt ωt 0 0 Fundamental component (a) (b) i 1 IL = Ia D 3 D 2 ...

PROBLEMS 819 the applied voltage at the terminals and the current drawn by the motor, respectively. (a) WithV ̄as reference, dra ...

820 BASIC CONTROL SYSTEMS *16.2.4A separately excited dc generator has the follow- ing parameters: Field winding resistanceRf= 6 ...

PROBLEMS 821 (b) The initial speed, final speed, and the speed drop in r/min. 16.2.12Consider a separately excited dc motor havi ...

822 BASIC CONTROL SYSTEMS Rfg vfg ifg Lfg Ifm = constant eg ωm + − R i G − + MJb − + Figure P16.2.17 Servo amplifier Va^ ∠^ ±^90 ...

PROBLEMS 823 excited dc motor driving a mechanical load. Let Jbe the combined polar moment of inertia of the load and motor, and ...

824 BASIC CONTROL SYSTEMS (e) For a step input ER, obtain the final steady- state response ωm(∞), i.e., evaluate ωm(∞)/ER. (f ...

PROBLEMS 825 ea ea Constant field or permanent magnet Constant field or permanent magnet (a) Electronic instrument such as dc mi ...

826 BASIC CONTROL SYSTEMS Figure P16.2.34, which uses proportional control. WithTd(s)=0, if a unit-step function is applied to t ...

PROBLEMS 827 − + sJ + B ΩR(s) E(s) 1 Ω 0 (s) Controller (a) Turbine Load Kp Kt − + sJ^ +^ B ΩR(s) E(s) 1 Ω 0 (s) (b) s Ki K t Fi ...

828 BASIC CONTROL SYSTEMS G(s)= 10 s^2 +s− 2 (i) Is the system stable? (ii) If it is unstable, can it be made stable by employin ...

PROBLEMS 829 + − + − s + 2 1 s 10 1 sK 0 R C Figure P16.2.45 ++ − s + 2 1 s 5 2 sK 0 R C − Figure P16.2.46 ...

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APPENDIX A References GENERAL ELECTRICAL ENGINEERING AND CIRCUITS Bobrow,Fundamentals of Electrical Engineering, 2nd edition. Ox ...

832 APPENDIX A Hansalman and Littlefield,Mastering MATLAB 5: A Comprehensive Tutorial and Reference, Prentice-Hall, Upper Saddle ...

APPENDIX B Brief Review of Fundamentals of Engineering (FE) Examination Anyone who wishes to practice the engineering profession ...