EEPW2150 - Electrical Principles
EEPW 2150 Prerequisites: Electrical Principles 3 Credit Hours PHYS 1210 To provide students with an understanding of basic electrical principles and concepts, leading to the ability to carry out calculations involving DC circuits, inductive circuits, capacitive circuits and AC fundamentals. This course should enable the student to: Understand DC circuit theorems. Select a suitable replacement inductor for a specific application Select a suitable replacement capacitor for a specific application Examine simple RL and RC circuits and determine time constants and magnitudes of instantaneous voltage and current Determine the basic terms used to define periodic AC voltage and AC current waveforms. Analyze series and parallel AC circuits containing resistance (R), inductance (L) and capacitance (C) connected to a steadystate sinusoidal voltage source. Correctly use a dual trace CRO to determine AC voltage and current, period, phase angle, frequency and DC voltage. Explain the operating principles of the ideal transformers. A student who satisfactory complete the course should be able to: Apply DC circuit theorems to solve engineering problems. Distinguish between different types of commercially available inductors. Identify inductor characteristics using manufacturers' data sheets. List typical applications for inductors in electric circuits. Determine by measurement whether a given inductor is serviceable and state common faults. Describe the precautions to be taken when opening highly inductive circuits. Define capacitance and explain how a capacitor is charged and discharged in terms of its electrostatic field. Calculate the capacitance of a capacitor given voltage and charge. List the factors which determine the capacitance of a capacitor. Distinguish between different types of commercially available capacitors. Identify capacitor characteristics using manufacturers' data sheets. List typical applications for capacitors in electric circuits. Calculate and measure the equivalent capacitance of series and parallel connected capacitors. Determine through measurement whether a given capacitor is serviceable and state common faults. State the hazards and precautions to be observed when working with large capacitors. Construct simple circuits incorporating RL and RC networks for a given time constant. Determine the time constant for RL and RC circuits. Determine the instantaneous voltage and current values in RL and RC circuits for multiples of time constant. Describe periodic AC voltage and current waveforms in the time domain. Explain how a sinusoidal output voltage is generated in a single turn coil rotating in a uniform magnetic field and sketch the sine wave. Discuss the various types and characteristics of AC generators used to produce sine, square, rectangular and triangular AC waveforms. Measure the instantaneous, peak, peak-peak values and period of sinusoidal waveform. Calculate the Root Means Square (RMS) value and frequency of a sinusoidal waveform using measured values of peak voltage and period. Determine the phase relationship between two or more sinusoidal waveforms given a waveform diagram or from measurements. Define inductive reactance, capacitive reactance and impedance, and indicate how each varies with frequency. Draw phasor diagrams to show the phase relationship between voltage and current in a pure resistor, pure capacitor and pure inductor respectively. Calculate amd measure the voltages and currents in series and parallel RL, RC and RLC circuits. Draw the impedance triangle and phasor diagrams for series and parallel RL, RC and RLC circuits. Define true, reactive and apparent power and power factor. Describe the function of each block given the block diagram of a CRO. Identify and describe the functions of each control on the faceplate of the CRO. Calibrate the CRO in order to make accurate measurements. Connect the CRO in circuit and measure period AC voltages, DC voltages. Derive AC circuit current and signal frequency by calculation from CRO measurements. Describe the calibration and measurement limitations of CRO probes. Describe the basic operation and construction of a transformer mentioning the need for a sine wave input. Define transformer turns ratio. List typical applications of power transformers. Define volt-amp rating. Calculate and measure primary and secondary voltages and currents in stepup and step-down transformer circuits.