67 views

1 Answer

Answer :

The shaded pole motor is used for low starting torque.

Like 0 like

Please log in or register to answer this question.

Related questions

109 views

Last Answer : A shaded pole motor can be used for toys, hair dryers, circulators etc.

1 answer
87 views

Last Answer : Locked rotor current of a shaded pole motor is slightly more than full load current.

1 answer
282 views

Description : With a neat sketch give the working of shaded pole induction motor.

Last Answer : Explanation: It has squirrel cage rotor and salient pole stator. The stator poles are shaded partially by short circuited conductor band to create the phase difference between the fluxes emerging from shaded ... rotating magnetic field in the air-gap and torque is exerted on the squirrel cage rotor.

2 answers
132 views

Description : State two applications of 1) Shaded pole motor 2) Universal motor

Last Answer : (i)Applications of Shaded pole motor: 1. Small fans 2. Toy motors 3. Hair dryers 4. Ventilators 5. Electric clocks 6. Record players 7. Motorized valves 8. Gramophones 9. Photocopying ... 5. Portable Drilling Machines 6. Electric Shavers 7. Mechanical computing Machines 8. Machine Tools etc.

1 answer
354 views

Last Answer : In case of a shaded pole motor the direction of rotation of the motor is from main pole to shaded pole.

1 answer
219 views

Last Answer : In a shaded pole single-phase motor, the revolving field is produced by the use of shading coils.

1 answer
133 views

Last Answer : In a shaded pole motor, the shading coil usually consist of a single turn of heavy copper wire which is short-circuited and carries only induced current.

1 answer
121 views

Last Answer : The range of efficiency for shaded pole motors is 5% to 35%.

1 answer
841 views

Last Answer : The torque produced in induction type relay (shaded pole structure) is inversely proportional to the square of the current.

1 answer
264 views

Last Answer : If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will stop.

1 answer
377 views

Description : what will happen when excitation of an unloaded salient pole synchronous motor suddenly gets disconnected?

Last Answer : When excitation of an unloaded salient pole synchronous motor suddenly gets disconnected the motor will stop.

1 answer
65 views

Last Answer : The motor used for the compressors is capacitor-start capacitor-run motor.

1 answer
105 views

Last Answer : The speed control of universal motor used for sewing machines is by varying the resistance.

1 answer
57 views

Last Answer : The electric motor used in portable drills is universal motor.

1 answer
201 views

Description : The armature current on symmetrical 3 phase short circuit of a synchronous machine (salient pole)  (A) has q -axis current only (B) has d -axis current only (C) has both d and q axis currents (D) cannot be divided between q and d axis currents

Last Answer : The armature current on symmetrical 3 phase short circuit of a synchronous machine (salient pole) has d -axis current only

1 answer
216 views

Description : State the insulating materials used in motor. Write temperature class and withstand temperature ranges for them. 

Last Answer : The insulating materials used in motor are as belows: 1. Cotton, 2. Silk, or paper, 3. Press board, 4. Resins 5. PVC 6. Cellulose-Fiber, 7. Enameled coating, etc  ... Over 180° Mica, porcelain, ceramics, glass quartz, asbestos, treated glass fiber or treated asbestos. etc.

1 answer
156 views

Description : State starters used for i) 3-Ph squirrel cage induction motor (3HP) ii) D.C. motor 

Last Answer : Name the starters used for following motors : i) 3 H.P. 3-Ph squirrel cage I.M: i) DOL starter OR ii) Star-Delta Starter OR ii) Auto transformer starter OR iii) Soft start starter.  ii) D.C Shunt Motor : 1) Armature resistance starter (Three Point Starter) OR 2) Four Point Starter 

1 answer
1.0k views

Description : The motor used for electric traction is  (1) D.C. shunt motor (3) D.C. series motor  (2) D.C. compound motor (4) Synchronous motor

Last Answer : The motor used for electric traction is D.C. series motor

1 answer
93 views

Last Answer : The repulsion-start induction-run motor is used because of high starting torque.

1 answer
164 views

Last Answer : In a two value capacitor motor, the capacitor used for running purposes is paper spaced oil filled type.

1 answer
149 views

Last Answer : The motor used on small lathes is usually single-phase capacitor run motor.

1 answer
891 views

Last Answer : A centrifugal switch is used to disconnect starting winding when motor has picked up about 50 to 70 per cent of rated speed.

1 answer
162 views

Description : The damping winding in synchronous motor is generally used to?

Last Answer : The damping winding in synchronous motor is generally used to provide starting torque and prevent hunting.

1 answer
77 views

Description : Which type of starter is used to start the DC motor?

0 answers
81 views

Description : Which type of motor is used in lift?

Last Answer : Synchronous motor

1 answer
81 views

Description : Why DC motor is used for traction?

0 answers
78 views

Description : Which motor is used in traction system?

0 answers
9 views

Description : Pole Climbing & Attention to Street Light, Jumpers & Insulator Checking & Replacement of Insulator?

Last Answer : Ans. (a) Before pole climbing, supply to be disconnected (b) While climbing safety belt, helmet to be used. (c) While attending street light, safety board to be displayed. (d) While providing jumpers ... non-essential (g) Essential loads to be brought to single point. (h) Then connect UPS supply.

1 answer
11 views

Description : How to Rig a Fishing Pole

Last Answer : How to Rig a Fishing Pole Fishing can be a really exciting outdoor experience, not just a nap in the middle of a lake while holding a complicated stick. Rigging a fishing pole ... these steps, you can prepare your fishing equipment properly for a weekend afternoon of recreation and relaxation.

1 answer
6 views

Description : How to Build a Pole Barn ?

Last Answer : How to Build a Pole Barn How to Build a Pole Barn One of the simplest installations that you can make in your property is a pole barn. Usually found on agricultural land, a pole barn ... . Pond construction is also helpful if you want to add some extra features for your small household farm.

1 answer
1.6k views

Description : A 50 Hz, 4 pole turboalternator rated at 20 MVA. 13.2 KV has an inertia constant H = 4 KW sec/KVA. The K.E. stored in the rotor at synchronous speed is

Last Answer : A 50 Hz, 4 pole turboalternator rated at 20 MVA. 13.2 KV has an inertia constant H = 4 KW sec/KVA. The K.E. stored in the rotor at synchronous speed is 80 MJ

1 answer
101 views

Description : Salient pole rotor is use for which speed?

Last Answer : Salient pole rotor is use for low and medium speed prime movers.

1 answer
354 views

Description : Explain MOSFET gate drive circuit and totem pole configuration.

Last Answer : MOSFET gate drive circuit: The turning on and turning off of MOSFET can be controlled from gate to source voltage signal. If the gate to source voltage of MOSFET exceeds threshold ... this configuration, the two switches (transistors) are used in totem pole arrangement with a comparator.

1 answer
376 views

Description : The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is 

Last Answer : The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is 4 percent

1 answer
163 views

Description : The speed of a 2-pole, 3-phase stepper motor operated by 1200 pulses/min (A) 100 rpm (B) 200 rpm (C) 400 rpm (D) 800 rpm

Last Answer : The speed of a 2-pole, 3-phase stepper motor operated by 1200 pulses/min 200 rpm

1 answer
100 views

Description : The maximum reluctance power of a salient-pole synchronous motor having direct-axis reactance, 1.0 pu and quadrature-axis reactance, 0.5 pu, and input voltage, 1.0 pu is (A) 0.25 pu (B) 0.5 pu (C) 1.0 pu (D) 1.5 pu

Last Answer : The maximum reluctance power of a salient-pole synchronous motor having direct-axis reactance, 1.0 pu and quadrature-axis reactance, 0.5 pu, and input voltage, 1.0 pu is 0.5 pu

1 answer
2.1k views

Description : A 3-phase, 4-pole, 50Hz induction motor runs at a speed of 1440 rpm. The rotating field produced by the rotor rotates at a speed of ________ rpm with respect to stator field. (A) 1500 (B) 0 (C) 1440 (D) 60

Last Answer : 0

2 answers
183 views

Description : An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW. Its rotor input is (A) 5.06 kW (B) 0.3 kW (C) 100 kW (D) 83.33 kW

Last Answer : An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW. Its rotor input is 83.33 kW

1 answer
3.4k views

Description : A _________ is used to measure the stator % winding temperature of the generator.  (A) Thermocouple (B) Pyrometer (C) Resistance thermometer (D) Thermometer

Last Answer : A Resistance thermometer is used to measure the stator % winding temperature of the generator. 

1 answer
706 views

Description : Peterson coil is used for :  (A) shunt compensation of lines (B) grounding of system neutral (B) reduce fault currents (D) connecting interconnected systems

Last Answer : Peterson coil is used for : grounding of system neutral

1 answer
71 views

Description : Stepper motors are used in  (1) printers (2) lifts (3) amplifiers (4) oscillators

Last Answer : Stepper motors are used in printers 

1 answer
185 views

Description : In a dc machine, interpoles are used to  (1) neutralize the effect of armature reaction in the interpolar region (2) generate more induced emf in the armature (3) avoid interference of the armature flux with the main -field flux (4) reduce the demagnetizing effect of armature reaction

Last Answer : In a dc machine, interpoles are used to neutralize the effect of armature reaction in the interpolar region

1 answer
358 views

Last Answer : In D.C. machines fractional pitch winding is used to reduce the sparking.

1 answer
124 views

Last Answer : Starters are used with D.C. motors because to restrict armature current as there is no back e.m.f. while starting.

1 answer
135 views

Last Answer : The capacitors used in single-phase capacitor motors have no polarity marking.

1 answer
79 views

Description : What are the five types of single phase motors used in the industry?

0 answers
245 views

Description : Split phase induction motor

Last Answer : Split phase induction motor : There are two windings used in split phase induction motor. It is a type of single-phase induction motor. There are two winding one is called main winding and ... motor have low starting torque it is used for small fans, blowers, centrifugal pumps, grinders etc.

1 answer
146 views

Description : Describe the reason of using dc series motor for electric trains.

Last Answer : Electric trains require an inverse torque speed characteristics for proper operation. That is a higher torque is required at start (when speed is nil or low) and as the train picks up ... torque - speed characteristics of DC series motors match, these motors are suitable for electric trains

1 answer
497 views

Description : A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net Voltage across armature resistance at the time of plugging will be

Last Answer : A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net Voltage across armature resistance at the time of plugging will be 474 V

1 answer
92 views

Description : Damper winding in a synchronous motor

Last Answer : Damper winding in a synchronous motor Serves to start the motor.

1 answer
...