Find the resonant frequency arallel resonance
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Frequency characteristics(Xi, xc,x,z, y, o vs o Z=R+A=R+(L+Xc)=R+ilo I
文件格式: PPT大小: 135KB页数: 5
Let us now define resonance. In a two-terminal electrical network containing at least one inductor and one capacitor, resonance is the condition which exists when the input impedance of the network is purely resistive
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Example 2: (p175-12) resistor, capacitor, and voltage source=100cos300n are all in series. If the average power dissipated by the resistor is 150W and the rms capacitor voltage is 10v, determine R and C
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sinusoidal voltage: V =V29 A sinusoidal current: I= We define the complex powerS=vi=V∠9,I∠-9 =V∠,-=V∠=+ jVI sin=P+j P=VIcos 9 --active(average) power
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We assume=Im cos(t+a)i=Im cos(ot+B) The phase angle by which the voltage leads
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Example 1: If 0=4v2 cos\tV, Z=2/600Q2 Find p(t)and P. Solution:
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The phasor diagram is a name given to a sketch in the complex plane of the phasor voltages and currents throughout a specific circuit
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8-2 Superposition, source transformation and Thevenin's theorem Superposition:
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