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in 4 point starter we use a protactive rasistance to control the speed of motar in 3point starter speed is uncontolled

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Why most of the induction motors have 1440 RPM in India?

To calculate the speed of an induction motor use the following formula, RPM = Hz x 60 x 2/motor # of poles. To answer the question, most of the motors must have 4 poles.


Which type of motor is used in lathe?

The type of motor used depends on the size of the lathe.Small "hobby" lathes use small fractional (1/8, 1/4...) horsepower ac motors which run on household single-phase power.The lathes which are used to produce crankshafts for huge marine diesel engines - or the rotor shafts of the massive alternators used to generate megawatts of electrical power - must use giant-sized motors, producing hundreds of horsepower.DC SHUNT MOTORS.Three-phase electric motor.


What Preservation can be done on electric motors while in storage?

• Bearings - Static Indentation Motors should be stored in an area free from any source of vibration since this can cause premature bearing failure due to static indentation • Lubrication Motor bearings are lubricated at the factory for the shelf life of the grease (approximately 4 years). • Condensation Motors should be stored in a warmed, ventilated storage area to minimize the risk of condensation. • Motors provided with drain holes The drain holes should be kept open and clean. In storage the motors should be stood such that the drain holes are at the lowest point so that any condensation which does form will escape. • Motors without drain holes Provided that the environment is warmed and ventilated, no action is necessary, although a periodic insulation test is advisable (approximately every three months) to ensure it is maintained above 1 megaohm. If motors are to be used or stored in cold and/or damp environments, we would recommend the fitting of anticondensation heaters; the heaters should be permanently energised if stored in these conditions. N.B. Heater circuit to be isolated before inspection


What is the starting method of synchronous motor?

There are 5 types of starting in induction motors: 1) resistance variable method 2) auto transformer method 3) slip ring induction motor method Squirrel cage induction motor using two types of starting methods 1.Direct on line starter 2.Star delta starter


What are the uses of induction coils?

1. Transformer 2. DC/ AC Motors 3. Solenoid valves 4. Contactors/ Relays 5. Amplifiers

Related Questions

What is the use of 4-point starter in motors?

The four-point starter eliminates the drawback of the three-point starter. In addition to the same three points that were in use with the three-point starter, the other side of the line, L1, is the fourth point brought to the starter when the arm is moved from the "Off" position. The coil of the holding magnet is connected across the line. The holding magnet and starting resistors function identical as in the three-point starter. * The possibility of accidentally opening the field circuit is quite remote. The four-point starter provides the no-voltage protection to the motor. If the power fails, the motor is disconnected from the line.


Do you use a fuel mix for Yamaha 4 stroke 4x4 ATV?

No 4 stroke motors use 91 octain fuel or better. You only mix oil & gas for 2 stroke motors.


Difference between 3 point starter and 4 point starter?

1." the shunt connection in four point stater is provided separately form the line where as in three point stater it is connected with line which is the drawback in three point starter 2.In three point starter NVR (no voltage relay)is series with shunt if voltage falls certain value NVR De energized due to insufficient magnetic field and motor turned off. But in four point starter NVR energized directly from DC supply thus the draw back of 3 point starter rectified


Is 4 point starter used to start and control the speed of dc shunt motor with armature resistance control?

yes


How do you replace a starter on a 83 Chevy S-10?

One of the easiest starters ever... 1) Disconnect negative battery cable 2) Remove nut holding power wire to starter. 3)Remove smaller wire(s) to starter. Mark which goes where if several are present, and you don't think you'll remember how it goes. 4)Remove the starter bolts that are locatd directly under the starter. 5)Starter will come out of vehicle at this point. NOTE: Many Chevy's use shims to space the starter from the flywheel. If your vehicle uses them the new starter will likely come with shims. Use the same number of shims as was in the vehicle when you took it apart. If starter grinds when starting after starter replacement you may need to add additional shims.


What is the horsepower on the 1995 Chevy Cavalier 4 - cylinder?

2.2ohv motors have 120hp 2.3 Quad 4 motors have 150hp 2.4 Twin Cam motors have 150hp(1996-2002)


Where is the starter located on a 94 Deville 4 point 9 liter not Northstar?

lower front of the engine see it from under the car


What kind of extensions tools do you use to remove the starter?

4" to 6" all depend on what car.


Where is the starter located on a Mazda 626 4 cylinder?

Where is starter on a 4 cylinder mazda 626?


Where is a 1988 Chrysler lebaron 4 cylinder starter solenoid?

It is on the starter.


Can you use the same 5-30wt oil that we use on cars for boat motors?

Yes, if it is a 4 cycle boat engine. However if the engine is a 2 cycle engine you cannot use automobile 4 cycle oil and must use 2 cycle engine oil.


Why most of the induction motors have 1440 RPM in India?

To calculate the speed of an induction motor use the following formula, RPM = Hz x 60 x 2/motor # of poles. To answer the question, most of the motors must have 4 poles.