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Stepper Motors – 1 – 2

6. Wave excitation of a stepper motor results in :

(a) microstepping
(b) half-stepping
(c) increased step angle
(d) reduced resolution

ANSWER

EXPLANATION

7. A stepper motor having a resolution of 300 steps/rev and running at 2400 rpm has a pulse rate of— pps.

(a) 4000
(b) 8000
(c) 6000
(d) 10,000

ANSWER

EXPLANATION

8. The torque exerted by the rotor magnetic field of a PM stepping motor with unexcited stator is called ………………torque.

(a) reluctance
(b) detent
(c) holding
(d) either (b) or (c)

ANSWER

EXPLANATION

9. A variable reluctance stepper motor is constructed of ……………… material with salient poles.

(a) paramagnetic
(b) ferromagnetic
(c) diamagnetic
(d) non-magnetic

ANSWER

EXPLANATION

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