Which of the following types of DC motors are typically controlled by a DC drive? Chose all that apply Group of answer choices brush-less DC shunt series permanent magnet compound
Q: The direction of rotation of Series DC motor can be reversed by interchanging terminal(s). 1) Field…
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Q: A 6-pole, 220-V shunt motor has a wave connected armature with 116 turns. Armature resistance…
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Q: F-a). Single-phase repulsion motors have......... . a) excellent starting torque b) excellent…
A: a). Single-phase repulsion motors have......... .a) excellent starting torque b) excellent running…
Q: A 220V d.c shunt motor is having armature current of 10 A and torque of 10 N-m.Find the torque when…
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Q: Urgent need in 5 mins please :( * A triplex lap wound armature has 300 turns and takes 125 A of…
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Q: Which of the following single-phase split-phase motors performs better while running? a)…
A: We are authorized to answer one question at a time, since you have not mentioned which question you…
Q: 6- If a D.C. shunt motor is working at no load and if the shunt field circuit suddenly opens (a)…
A: The answer is option c.
Q: P-1).. Which of the following determine the amount of torque produced by a single-phase split-phase…
A: In single phase split phase motor the amount of torque produced is depend on the phase angle…
Q: the magnetic strengh of the field poles on a perment magnet DC motor cannot be varied a- true b-…
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Q: The armature of a 8 pole DC motor carries 314 conductors which are lap connected . For an armature…
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Q: Which type of motors are not self-starting? Select one: O a. DC Generator O b. Single Phase…
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Q: The armature winding of a 200-V., series motor is lap-connected. There are 280 slots and each slot…
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Q: M1. Which of the following is the preferred method of changing the direction of rotation of a DC…
A: a) The direction of rotation of motor is reversed either by changing the polarity of armature coil…
Q: 12 Why does DC motor sometimes run too fast when under-loaded? * O Due to high line voltage O all of…
A: Q. Why does DC motor sometimes run too fast when under-loaded? Ans. Due to weak field Explanation…
Q: A 220V d.c shunt motor is having armature current of 10 A and torque of 10 N-m.Find the torque when…
A: Given machine is DC shunt motor. For shunt motor, flux is constant because shunt current and voltage…
Q: 10) In case of D.C. shunt motors the speed is dependent on back e.m.f. only because A. Back e.m.f.…
A: Note: As per our guidelines we are supposed to answer only 3 multiple choice questions. Kindly…
Q: A 230 volt shunt motor runs at 800 rpm and takes an armature current of 50 amperes. Find the…
A: In a DC shunt motor when the flux generated by the field winding is proportional to the current in…
Q: The permanent magnet machines (PMM) known as "Brushless Permanent Magnet Motors", "Brushless DC…
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Q: field due to the relation E= ILB 5- In series d-c generator the field winding will be constructed…
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Q: A simplex wave wound armature has 300 turns and takes 125 A of armature current. The flux per pole…
A: back emf = flux ×speed ×total armature conductors60×polesarmature parallel paths shaft torque =…
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A: In this question , we will write having silent poles on stator and rotor, a switched reluctance…
Q: .a)-Which of the following would indicate that a motor has good speed regulation? a) 8% speed…
A: For good speed regulation variation of speed from no load to full load is less. Back…
Q: A DC shunt motor takes an armature current of 20A at 800V, It has an armature resistance of 0.06…
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Q: 1- The characteristic (angular speed versus T) of a dc shunt motor is known as the External…
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Q: Which type of motors are not self-starting? Select one: O a. DC Generator O b. Single Phase…
A: The objective is to determine the correct option for the motor which is not self starting.
Q: What total current must the armature of a d-c motor whose flux density is 60,000 lines per sq. in.,…
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Q: The armature and shunt field resistance of a 500 V shunt motor are 0.1 and 100 ohms respectively. A…
A: we need to find out the value of additional resistance.
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Q: If current taken by series motor is increased from 10 A to 13 A, the percentage increase in its…
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Q: dc long shunt compound generators delivers a current of 80 A at 300 V. The armature, series field…
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Q: A dc motor will runaway if it runs at over-rated load with armature reaction: Select one: a. none of…
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Q: Why Hysteresis Losses of DC motor is constant? O a. It depends on load O b. none of the above O c.…
A: The explanation is as follows.
Q: Series motor maintains a more constant speed under varying load The characteristic (T versus la) of…
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Q: The armature of a 12 pole DC shunt generator has 50 slots and is wave wound with 12 conductors per…
A: Given: Number of poles P = 12 Number of slots = 50 Speed N = 625 rpm Terminal voltage = 300V…
Q: Explain the difference between an inductively-compensated and a conductively compensated universal…
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A: Armature current is 45 A. And we know value of w can be calculated by E=km∅ωIa is armature current∅…
Q: A 5HP 230V 1500 rpm shunt motor has an armature resistance including brushes of 0.175 ohm, the shunt…
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Q: 7) Starters are used with D.C. motors because: A. These motors have high starting torque B. These…
A: 7.Back emf of DC motor is proportional to speed and armature current I = Vt-EbRa As back emf is…
Q: A 4 pole10V, DC shunt motor operates on a load current 10A, having wave connected armature with 200…
A: Given: A 4 pole 10V DC shunt motor in which IL=10AA=2Z=200ϕ=25mWbRsh=1ΩRa=0.15Ω According to…
Q: Q4: A 4-pole, 250-V, d.c. shunt motor has a lap-connected armature with 960 conductors. The flux per…
A: According to the given data: p=4 V=250 V z=960 ϕ=0.02 IL=30 A Ish=2 A Ia=28 A Ra=0.12 Ω Rsh=125 Ω
Q: A 250 V DC shunt motor runs at 950 rpm and takes a line current of 55A.Find the resistance to be…
A: Back EMF is directly proportional to product of speed and flux. Back EMF= Terminal voltage +armature…
Q: :A: Answer (five) of the following questions: と。 C cannot travel for very longer distanse. If does,…
A: 1). AC can travel for long distance , all the transmission of power for very long distances done in…
Which of the following types of DC motors are typically controlled by a DC drive?
Chose all that apply
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- Why are different motor connections shown for what appears to be the same motor in the various diagrams in Figure 332? FIG. 332 Typical arrangements for four-speed, three-phase, two-winding motors.What are the advantages and disadvantages of using the following types of motors? shaded-pole motor PSC motor split-phase motor capacitor-start–capacitor-run motorX-a). A universal motor's compensating winding can be connected for_________ compensation when supplied with an AC voltage.a) conductive b) inductive c) either "a" or "b" d) neither "a" nor "b"X-b). A universal motor has___________ speed regulation_a) poor b) good c) excellent d) none of the aboveX-c). How may the direction of rotation of a universal motor be reversed?a) by reversing the direction of current flow in the armature conductors b) by reversing the direction of current flow in the field windings c) either "a" or "b" d) neither "a" nor "b"
- P-1).. Which of the following determine the amount of torque produced by a single-phase split-phase motor? a) The strength of the magnetic field of the stator b) The strength of the magnetic field of the rotor c) The phase angle difference between the current in the start winding and the current in the run winding d) all of the above P-2). The phase angle difference between the currents in the start winding and run winding of a single-phase split-phase motor is typically 90 degrees. a) true b) false P-3). A centrifugal switch is used to disconnect the________ winding of a non-hermetically sealed single-phase split-phase motor at approximately 75% of rated speed. a) run b) start c) either "a" or "b" d) neither "a" nor "b" P-4). Where an internal centrifugal switch cannot be used, an external______ relay can be used to perform the same function in a single-phase split-phase motor. a) hot-wire b) current c) solid-state starting d) all of the abovea 220 V DC shunt motor takes 3 A at no-load. It draws 25 a when running at full load at 1500 rpm. The armature and shunt resistances are 0.5 ohm and 220 ohm, respectively. the no-load speed in rpm is _______.1. Explain the difference between an inductively-compensated and a conductively compensated universal motor. (a) Of the two types of motors mentioned in Question 1, which one is the better adapted on either AC or DC? Explain.
- 33.a. The maximum torque a motor can produce is called theA. locked-rotor torque.B. full-load torque.C. saturation torque.D. breakdown torque.33.b. An a-c motor operating at a power-line frequency of 60 Hz has a synchronous speed of 900 rpm. Thenumber of poles in this motor iA. 12B. 4C. 6D. 8F-a). Single-phase repulsion motors have......... . a) excellent starting torque b) excellent running torque c) unstable speed characteristics d) all of the above F-b). Which type of repulsion motor runs quieter? a) repulsion b) repulsion-start, induction-run c) repulsion-induction d) they are all the same F-c. Single-phase repulsion-induction motors have........ . a) high starting torque b) good speed regulation c) both "a" and "b" d) neither "a" nor "b"7.a)-Which of the following would indicate that a motor has good speed regulation? a) 8% speed regulation b) 60% speed regulation c) 100% speed regulation d) none of the above b) -Which of the following type(s) of DC motors has the best speed regulation? a) series b) shunt c) compound d) all of the above c) - Which of the following is the correct formula for speed regulation. a) % reg = {[(no-load) - (full-load)] ± (no-load)} x 100b) % reg = {[(full-load) - (no-load)] ± (full-load)} x 100 c) % reg = {[(no-load) - (full-load)] = (full-load)} x 100d) none of the above
- 2. A 6-pole, 220-V shunt motor has a wave connected armature with 116 turns. Armature resistance including brushes is 0.25 ohms. Armature current is 12 A at a no load speed of 960 rpm. What is the useful flux per pole? A. 21.7 mWb B. 19.5 mWb C. 24.2 mWb D. 28.2 mWbAnswer True or False, and correct the false statements for the following 1. Compound-connected D.C. motor is one of the self-excited D.C. motors types 2. Derivative gain in PID controller depends on the accumulation of past errors based onthe rate change of the current 3. Permanent magnetic DC motors are used in hoists and cranes 4. The speed of D.C. shunt motors don't change appreciably when the load torque isincreasing to the rated value 5. The exciting resistance of the transformer is used to generate magnetic flux in thecore7- A 220V d.c shunt motor is having armature current of 10 A and torque of 10 N-m.Find the torque when armature current is doubled a. 40 N-m b. 20 N-m c. 10 N-m d. 5 N-m
