In a 6 pole dc machine,90 mechanical degrees corresponds to ......... electrical degrees.
A. 30
B. 180
C. 45
D. 270
Explanatory answer:
The relationship between mechanical and electrical degrees is
1 degree mechanical = (P/2) electrical degrees
i.e. for 1 deg of mechanical revolution of conductor inside a magnetic field produces (P/2) degree electrical output.
Given, P=6
90 deg mechanical = 90 (P/2) electrical
= 90*(6/2)
= 270 degree electrical
i.e. for 90 deg mechanical revolution ,it produces 270 deg electrical output.
A. 30
B. 180
C. 45
D. 270
Explanatory answer:
The relationship between mechanical and electrical degrees is
1 degree mechanical = (P/2) electrical degrees
i.e. for 1 deg of mechanical revolution of conductor inside a magnetic field produces (P/2) degree electrical output.
Given, P=6
90 deg mechanical = 90 (P/2) electrical
= 90*(6/2)
= 270 degree electrical
i.e. for 90 deg mechanical revolution ,it produces 270 deg electrical output.
Wrong calculation
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