• The Final exam will be held on Wednesday, May 6 between 3:10 and 5:10 P in A-111.

• There will be two parts to the exam each graded out of  25 (e.g. 25% of the total, class grade):

  • The first part of the exam is the make-up for the first midterm. The grade of this part will be compared to the grade of the mid-term and the greater number will be entered into the grade record.

  • The second part will cover the material taught after the midterm.

  • One may choose to only solve the second part for the entire two hours of the exam and still keep the old grade. One may not choose to omit the second part because the grade for this will be zero.

• The Exam is closed books and closed notes. Two front-and-back cheat sheets of notes are allowed.

• Diode rectifiers:

  • Single-phase full-wave rectifiers R load (3.4): Know to draw the ac and dc waveforms, calculate average dc voltage, rms and fundamental ac current, power;

  • Single-phase full-wave rectifiers R-L-E load (3.5): Know to draw ac and dc waveforms, especially under continuous and smooth dc current; know to calculate average dc voltage and fundamental and harmonic ac current under smooth dc current conduction.

• Thyristor (Controlled) Rectifiers:

  • Principles of thyristor circuits, definitions of ignition angles (7.4, 7-5, 10.2): know how the thyristor operates, its v-i characteristics; know to draw waveforms in a single thyristor resistive circuit;

  • Single-phase full rectifiers (10.3): Know to draw dc voltage and ac current waveforms under R-L-E load and smooth dc current conduction; know to calculate converter ac and dc output at fundamental frequency and harmonic frequencies under smooth dc current.

• DC-DC Converters (Choppers):

  • DC-DC Regulators (5.8.1,2,3): Know how the buck regulator, boost regulator, and buck-boost regulators work; know how to calculate the output voltage and input current; know how to calculate the output filter (L and C) for continuous current conduction.

Second Part

• DC-AC Conversion (Inverters, PWM Inverters):

  • Three-phase bridge inverters square wave operation 180 and 120 deg conduction (6.5.1,2): Know how to draw the ac output waveforms; know how to calculate the fundamental and harmonic ac voltage;

  • Sinusoidal PWM for three-phase inverters (6.8.1): know the principle of sinusoidal PWM; Know to calculate the ac voltage fundamental in the linear modulation region; know to calculate the dc current.

• DC Motor Drives:

  • Basics of the separately excited DC motor (15.2, 15.3): know the basic motor equations, speed-torque characteristic; know how to calculate motor torque; know the operating modes of the motor;

  • Single-phase full-converter drives (15.4.3,4): know to calculate the performance of the drive under smooth dc current (torque, speed, dc current, firing angle, ac current, pf).

• AC Motor Drives:

  • Induction motor fundamentals (16.2, 16.2.1): know the basics of induction motor operation; know the power flow diagram and the relation between different powers; know how to calculate motor speed; know how to solve motor equivalent circuit;

  • Frequency and voltage control (16.2.4,5): know the principles of this control; know how to calculate motor performance (speed, torque, current, and power) under V/Hz control;

  • Rotor voltage control and static Kramer drive (16.2.3) (slip power control): know the principles of slip control; know how to calculate the performance of a Kramer drive (slip power feedback) under certain simplifying assumptions (e.g. neglecting motor impedance).