What is main function of capacitor in single phase induction motor?

Questions by krunal prajapati

Showing Answers 1 - 19 of 19 Answers


  • Feb 23rd, 2013

High Starting

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  • Feb 27th, 2013

Motor starting requires toque so we use capacitor.

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  • Feb 28th, 2013

Because capacitor provides a high starting torque in single phase induction motor.

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  • Mar 3rd, 2013

According to double revolving theory net torque produce in single phase induction motor is 0. So we use a capacitor this capacitor creates phase difference because of leading component of current in one coil which result in obtaining torque. Value of capacitor is adjusted on such a way that it produces high starting torque.

@Rahul Rathee
MDU (Campus)

dinesh chaudhary

  • Apr 16th, 2013

single phase induction motor is not the self starting so, to make it self start we can use capacitor & capacitor also provides high starting torque.

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  • Jan 29th, 2014

capacitors used to start the single phase motor.....(starting torque)...

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suryatejreddy koduru

  • Feb 6th, 2014

basically for three phase induction motor,rotation of rotor is due to the RMF produced due to the alternating three phase current(with certain phase difference) flowing in the stator conductors...bt for the single phase induction motor there will be only one phase hence no phase difference...so the Rmf can be obtained using the capacitors and by using auxiliary switches.

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asmaa radwan

  • Feb 8th, 2014

to start induction motor by increasing starting torque

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  • Mar 5th, 2014

because there is two winding 1 is starting and another is running winding, so that the capacitor is connected to starting winding and to makes its self starting.

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  • Apr 27th, 2014

Capacitor use in 1 phase motor to split the phase

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Juma Errfadi Tamimi

  • May 24th, 2014

no inductive single phase motor can start without a capacitor . capacitor is used for 1.induct an other phase for motor which is 90 deg. to original phase 2.initiate a torque to start up motor 3. control speed & direction of rotation

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  • Jun 7th, 2014

Actually, 1 phase induction motor is not a self starting, the net torque in 1 phase motor is zero. By connecting capacitor at supply side(I.e stator winding), required torque can obtained and motor get started

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  • Jun 15th, 2014

Capacitors are used in1single phase induction motor to maintain pf ;no voltage drop .1single induction motor is not a self stating .the net torque in 1 phase motor is zero .by connecting capacitor at supply side required can obtained get started.

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Vinay vishwakarma

  • Jun 16th, 2014

1. to develop starting torque.
2. to split phase upto 90 degree.

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  • Apr 22nd, 2015

Capacitor are used for creating an angle between voltage and current ya ph difference between two windings.

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bheki zulu

  • May 26th, 2016

High starting torgue

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  • Aug 27th, 2016

In single phase induction motors to create phase difference as result of high starting torque capacitor used due to single phase induction motor is not self starting.

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manoj yadav

  • Sep 1st, 2016

Capacitors provide phase difference between voltage and current and give starting torque

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  • Jan 13th, 2017

Capacitor causes a lag in the phase, resulting in a good starting torque.

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