1
Q
Inductor voltage
A
v = L di/dt
2
Q
Capacitor current
A
i = C dV/dt
3
Q
Inductor Energy
A
1/2 L i²
4
Q
Energy in a magnetic circuit
A
½ * Φ² * S
(For energy in the air gap, use just reluctance of the air gap)
5
Q
Passive sign convention for a Load
A
Current into +
Power is +ive
6
Q
Passive Sign Convention Vab
A
Vab = Va - Vb
(arrow goes from b to a)
7
Q
Passive sign convention for a Power Source
A
Current into -
Power is -ive
8
Q
Capacitors in Series
A
1/C = 1/C1 + 1/C2 + 1/C3 + …
9
Q
Capacitors in Parallel
A
C = C1 + C2 + C3 + …
10
Q
Energy in a Capacitor
A
½CV²
11
Q
Ripple Voltage
A
Max - Min
(The difference in voltage during the ripple)
Mechanical Engineering
flashcards
Decks in class (14)
# Cards
