Which of the following problem arises in D.C. motors which are fed from thyristor bridge circuits ?
A) Increased I R losses
B) Increased core losses
C) Poor commutation
D) All of the above
Correct Answer:
Verified
Q10: The laminations of the armature of a
Q11: is usually used for brush rockers
A)Mild steel
B)Copper
C)Aluminium
D)Cast-iron
Q12: _ brushes are fragile and cause excessive
Q13: Which of the following brushes can be
Q14: _ is the common method of applying
Q16: The weight of copper of both armature
Q17: In a D.C. machine the number of
Q18: In a D.C. machine the current per
Q19: In a D.C. machine, the value of
Q20: In D.C. machines the width of the
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