Question 385Electricity/Electronics - QMED70% to pass
Within the split phase family of single phase motors, what are the operational characteristics of the motor shown in figure "B" of the illustration? Illustration EL-0207

AI Explanation
The correct answer is C) Relatively high starting torque and relatively low running efficiency.
The motor shown in figure "B" of the illustration EL-0207 is a split phase single phase motor. This type of motor is designed to have a higher starting torque compared to its running efficiency. The additional starting winding included in the split phase design provides the extra torque needed to overcome the initial inertia when the motor is starting up, but this additional winding also increases the overall losses in the motor during normal running operation, resulting in a relatively lower running efficiency.
The other answer choices are incorrect because A) describes a capacitor-start motor, B) describes a repulsion-start induction motor, and D) describes a capacitor-run motor, all of which have different operational characteristics compared to the split phase motor shown in the illustration.
Related Questions
#383 What is the main purpose of the auxiliary winding on a split-phase, single-phase motor? #384 What is the main function in the use of a capacitor for starting a single-phase motor? #386 As shown in figures "A", "B", "C", and "D" of the illustration, what is the usual means by which the rotation direction of the motor is reversed? Illustration EL-0207 #387 Of the following listed single-phase induction motors, which has the highest starting torque? #388 Which of the pictured motors within the split phase family of single phase induction motors represents a capacitor start, induction run motor? Illustration EL-0146