Chapter 23: Electric Motors and Generators

Example 23.1, Page 483

In [1]:
#initialization
n=100                   #no of turns
b=400*10**-3            #magnetic field
a=20*10**-4             #area in cm^2
w=105                    #angular frequency

#calculation
v=n*b*a*w                 #voltage

#result
print'Sinusoidal Voltage with Peak value = %.1f V'%v

Sinusoidal Voltage with Peak value = 8.4 V

Example 23.2, Page 488

In [2]:
#initialization
f=60                    #frequency in Hz
a=60                    #seconds

#calculation
f1=f/2                  #required rotation speed
f2=f1*a                  #equivalent rotation speed


#result
print'Rotation Speed = %d rpm'%f2

Rotation Speed = 1800 rpm

Example 23.3, Page 490

In [3]:
#initialization
f=50                    #frequency in Hz
p=4                     #four times magnetic field for 8 pole motor
a=60                    #seconds

#calculation
f1=f*p                   #required rotation speed
f2=f1*a                  #equivalent rotation speed


#result
print'Rotation Speed = %d rpm'%f2

Rotation Speed = 12000 rpm
In [ ]: