ESD Protection Simple Parallel Discharging Zener Diode Special Diodes for High speed Lines Electrical EngineeringUmm Al-Qura UniversitySlide 22
General Adder (Mixer) Electrical EngineeringUmm Al-Qura UniversitySlide 23
Slide 24 the integrator produces a voltage output proportional to the product (multiplication) of the input voltage and time the differentiator produces a voltage output proportional to the input voltage's rate of change.
Slide 28 A differentiator circuit produce s a constant output voltage for a steadily changing input voltage. An integrator circuit produces a steadily changing output voltage for a constant input voltage.
Process Check What circuits did you face in your field? Do you need more details? Where to find more Designs? Electrical EngineeringUmm Al-Qura UniversitySlide 29
Transformer Slide 33 A transformer is an electrical device that transfers power from one electrical circuit to another by magnetic coupling It is most often used to convert between high and low voltages Must be AC current; a transformer does not convert DC Uses Faraday’s law and ferromagnetic properties
DC Motor Variables Slide 49 E A (volt)is the back EMF V T (volt)is the applied voltage T dev (N.m)is the torque developed by DC Motor T load (N.m)is the opposing load torque m (rad/s)is the armature shaft speed = 2 rpm /60 R a ( )is the motor internal resistance I A (A)is the motor current
DC Generator Variables Slide 50 E A (volt)is the generated voltage V T (volt)is the load voltage T pm (N.m)is the prime-mover generated torque T dev (N.m)is the opposing motor torque m (rad/s)is the armature shaft speed = 2 rpm /60 R a ( )is the motor internal resistance I A (A)is the motor current
DC Machine Equations Slide 51 E A (volt)is the generated voltage T dev (N.m)is the motor torque m (rad/s)is the armature shaft speed = 2 rpm /60 I A (A)is the motor current Kis the machine constant (Wb)is the magnetic flux per pole
Power Electric Power: Mechanical Power: Slide 52
Ideal DC Machine Motor IN:Electric Power OUT:Mechanical Power Slide 53
Ideal DC Machine Generator IN:Mechanical Power OUT:Electric Power Slide 54
Motor Example A DC motor having R a = 0.2 , I A = 5A, V T = 220V, m = 1200 rpm What is: back EMF voltage? developed torque? developed power? Slide 55
Generator Example A DC generator having P mech = 1kW, R a = 0.3 , R L = 10 What is: electric current drawn? terminal voltage? Slide 56