Chapter 5 SteadyState Sinusoidal Analysis 1 Identify the
- Slides: 75
Chapter 5 Steady-State Sinusoidal Analysis 1. Identify the frequency, angular frequency, peak value, rms value, and phase of a sinusoidal signal. 2. Solve steady-state ac circuits using phasors and complex impedances. ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
3. Compute power for steady-state ac circuits. 4. Find Thévenin and Norton equivalent circuits. Lightly. 5. Determine load impedances for maximum power transfer. ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
SINUSOIDAL CURRENTS AND VOLTAGES Vt = Vm cos(ωt +θ) Vm is the peak value ω is the angular frequency in radians per second θ is the phase angle ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
Frequency Angular frequency ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
Root-Mean-Square Values ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
RMS Value of a Sinusoid The rms value for a sinusoid is the peak value divided by the square root of two. This is not true for other periodic waveforms such as square waves or triangular waves. ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
Phasor Definition ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
Adding Sinusoids Using Phasors Step 1: Determine the phasor for each term. Step 2: Add the phasors using complex arithmetic. Step 3: Convert the sum to polar form. Step 4: Write the result as a time function. ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
Using Phasors to Add Sinusoids ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
Sinusoids can be visualized as the realaxis projection of vectors rotating in the complex plane. The phasor for a sinusoid is a snapshot of the corresponding rotating vector at t = 0. ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
Phase Relationships To determine phase relationships from a phasor diagram, consider the phasors to rotate counterclockwise. Then when standing at a fixed point, if V 1 arrives first followed by V 2 after a rotation of θ , we say that V 1 leads V 2 by θ. Alternatively, we could say that V 2 lags V 1 by θ. (Usually, we take θ as the smaller angle between the two phasors. ) ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
To determine phase relationships between sinusoids from their plots versus time, find the shortest time interval tp between positive peaks of the two waveforms. Then, the phase angle is θ = (tp/T ) × 360°. If the peak of v 1(t) occurs first, we say that v 1(t) leads v 2(t) or that v 2(t) lags v 1(t). ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
COMPLEX IMPEDANCES ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
Kirchhoff’s Laws in Phasor Form We can apply KVL directly to phasors. The sum of the phasor voltages equals zero for any closed path. The sum of the phasor currents entering a node must equal the sum of the phasor currents leaving. ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
Circuit Analysis Using Phasors and Impedances 1. Replace the time descriptions of the voltage and current sources with the corresponding phasors. (All of the sources must have the same frequency. ) ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
2. Replace inductances by their complex impedances ZL = jωL. Replace capacitances by their complex impedances ZC = 1/(jωC). Resistances have impedances equal to their resistances. 3. Analyze the circuit using any of the techniques studied earlier in Chapter 2, performing the calculations with complex arithmetic. ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
“SPOOKY” And “SPECTRE” ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
AC-130 GUNSHIP ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION AC Power Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
AC Power Calculations ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
THÉVENIN EQUIVALENT CIRCUITS ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
The Thévenin voltage is equal to the open-circuit phasor voltage of the original circuit. We can find the Thévenin impedance by zeroing the independent sources and determining the impedance looking into the circuit terminals. ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
The Thévenin impedance equals the open-circuit voltage divided by the short-circuit current. ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
Maximum Power Transfer If the load can take on any complex value, maximum power transfer is attained for a load impedance equal to the complex conjugate of the Thévenin impedance. If the load is required to be a pure resistance, maximum power transfer is attained for a load resistance equal to the magnitude of the Thévenin impedance. ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
BALANCED THREE-PHASE CIRCUITS Much of the power used by business and industry is supplied by three-phase distribution systems. Plant engineers need to be familiar with three-phase power. ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
Phase Sequence Three-phase sources can have either a positive or negative phase sequence. The direction of rotation of certain three-phase motors can be reversed by changing the phase sequence. ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
Wye–Wye Connection Three-phase sources and loads can be connected either in a wye configuration or in a delta configuration. The key to understanding the various threephase configurations is a careful examination of the wye–wye circuit. ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION Chapter 5 Steady-State Sinusoidal Analysis
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