Electrical Equations
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18 Terms
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complex impedence Z
Z=R+j(XL+XC)
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unity power factor SERIES
|XL|=|XC|
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unity power factor PARALLEL
C=L/(R²+w²L²)
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base resistor equation
Rb = hfe(Vbb-Vbe)/Ic
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assumed Vbe
0.7V
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SI units: KE
Vs/rad
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SI units: KT
Nm/A
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motor data sheet eqns
V=IRa+E
E=KEw
T=KTI
(where V is rated voltage)
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Vs
Vs=(Ns/Np)Vp
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Is
Is=(Np/Ns)Ip
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turns ratio
Np/Ns
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motor efficiency
n=Pmech/(Pmech+I²Ra)
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Pmech
Pmech=Tw
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stored inductor energy
E=0.5LI²
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PWM duty cycle
desired volts/current volts
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PWM on time
duty cycle/frequency
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npn low side circuit
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Note 
Flashcards (106)