Conclude from the scenario below which type of documentation Holly should use, and explain why this would be the best choice. Ho
1 answer:
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Answer:
a)
b) P = 13,800 W
c)
di)
dii)
Explanation:
Voltage, Vt = 230 V
Armature current,
Armature Resistance,
a) The back emf is calculated as follows:
b) The power supplied to the armature (W)
P = 230 * 60
P = 13,800 W
c) Mechanical power developed by the motor
= Power supplied to the armature - Power lost in the armature
Power lost in the armature,
d)( i)The initial starting current if the motor is directly connected across the 230 V line
At starting, there is no back emf,
ii) Value of the starting resistor needed to limit the initial current to 115 A
Answer:
f=5.81 Hz
Explanation:
Given that
m= 0.3 kg
K= 0.4 N/mm
K= 400 N/m
C= 3.28
We know that undamped natural frequency given as
Now by putting the values
ω = 36.51 rad/s
We know that
ω = 2 π f
36.51 = 2 x π x f
f=5.81 Hz
So the undamped natural frequency is 5.81 Hz.
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