iii) Calculate the stepping angle of the Variable Reluctance Stepper Motor with 6 number of teeth on the stator and 20 number of teeth on rotor winding.
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- Sketch the cross-section of a reluctance stepper motor that has six stator poles and eight rotor poles. Your sketch should be similar to Figure 16.33(a) on page 828. Label the windings and specify the sequence of activation for clockwise rotation. What is the rotation angle per step?Explain with diagrams the operation of single stack variable reluctance stepper motor. Is it possible to construct a hybrid stepper motor with 2-phase 4-pole and 100 rotor teeth? Explain your answerExplain with diagrams the operation of single stack variable reluctancestepper motor. Is it possible to construct a hybrid stepper motor with 2-phase 4-pole and 100 rotor teeth?
- Suggest a suitable design of single-stack 4-phase variable reluctance stepper motor that has a step angle of 7.5 . Determine the phase switching sequence to rotate this motor in counter-clockwise direction(use full-step mode of operation)A 250V dc short-shunt motor takes a current of 5A. The shunt, armature, and series field resistances are 100 ohms , 0.25 ohms, and 0.80 ohms respectively, what is the SPL?A single phase synchronous motor gives an output of 9.46kW at 0.9pf lagging with 600V. If the stray power loss is 600W and the field losses is 900W, while effective armature resistance is 0.6Ω, find the efficiency of the synchronous motor.
- A 3-phase, star connected 400-V synchronous motor takes a power input of 5472 watts at rated voltage. Its synchronous reactance is 10 ohm per phase and resistance is negligible. If its excitation voltage is adjusted equal to the rated voltage of 400 V calculate the load angle, power factor and the armature current.Explain: a). Speed characteristics of dc series motor along with suitable diagram. b). Speed characteristics of dc shunt motor along with suitable diagram.Answer the followig.a. Give the two main categories of AC motors. Define.b. Discuss the constructional and working difference of Induction and synchronous motor.
- A 120V dc shunt motor has an armature resistance of 0.25Ω is drawing 50A. If a fixed loss of 200W was measured and neglecting the shunt field, what is the copper loss (in watts)? (meaning no shunt field used)A 2000 V,3 phase, 4 pole, star connected synchronous motor has a frequency of 60 Hz. The excitation voltage is constant at 2000 V (line-line)The resistance is negligible as compared to synchronous reactance of 3 ohm per phase. For a lagging constant armature current of 150 A, 2.a) the power factor is In problem #, with the same given information, the power input isA 2300-V, 3-phase, wye - connected, round rotor synchronous motor has a synchronous reactance of 3 ohms per phase and an armature resistance of0.25 ohm per phase. The motor operates on load such that the power angle is -15 degrees, and the excitation is so adjusted that the internally induced voltage is equal to the magnitude of the terminal voltage. Determine the armature current.