Analysis:
Let the signals are m_{1}, m_{2}, m_{3}, and m_{4}
Signal |
Maximum Frequency Component |
Sampling Frequency |
m_{1} |
f_{m1} = 3.6 kHz |
f_{s1} = 3.6 kHz |
m_{2} |
f_{m2} = 1.2 kHz |
f_{s2} = 3.6 kHz |
m_{3} |
f_{m3} = 1.2 kHz |
f_{s3} = 3.6 kHz |
m_{4} |
f_{m4} = 1.2 kHz |
f_{s4} = 3.6 kHz |
The speed of the commutator will be the HCF (f_{s1}, f_{s2}, f_{s3}, f_{s4}) × 60 rpm
= HCF(7.2k, 2.4k, 2.4k, 2.4k) × 60 rpm
= 2.4 k × 60 rpm
= 144 rpm
Speed = 144,000 rpm