Question 246Electricity & Electronics - QMED
70% to passIn DC motor construction, where are the commutating windings wound?
Aopposite main poles
Binterpoles
Cadjacent main poles
Dthe rotor core
AI Explanation
The correct answer is B) interpoles. In a DC motor, the commutating windings are wound on the interpoles, which are small auxiliary poles placed between the main poles. The purpose of the commutating windings is to create a magnetic field that helps commutate the current in the armature windings, ensuring a smooth and efficient transfer of power from the armature to the external circuit. The other options are incorrect because: A) the main poles are responsible for the main magnetic field, not the commutating windings; C) the commutating windings are not wound on the adjacent main poles; and D) the commutating windings are not wound on the rotor core, but rather on the interpoles.
Related Questions
Q369:Although saturable reactors are extremely useful in some applications, why is th... Q497:How does a circuit breaker differ from a fuse? Q218:What is the wattage of a heating element drawing a current of 30 amperes, at 120... Q289:In using a portable growler for the purpose of locating a shorted stator coil in... Q503:How will a molded-case circuit breaker with a thermal trip unit react immediatel...
Ready to test your knowledge?
Take a Electricity & Electronics - QMED Practice ExamOfficial Resources