Engineering Q&A
Single Phase Induction Motor
in Electrical Machine by

1 Answer

1 like 0 dislike
Best answer

Single Phase Induction Motor

•Single phase induction motor is mostly used in home, office, shop and many single phase appliances like pumps, ceiling fan, washing machine etc.

•Single phase induction motor is less efficient than three phase induction motor but three phase power is mostly available in large industrial places.

•Single phase induction motor is not self starting motor.

•Single phase induction motor have one main winding in the stator with this winding by adding another winding (auxiliary or starting) and resistance or capacitor in series or parallel we can make single phase induction motor self starting.

•Single phase induction motor are

   

    Shaded pole induction motor

    Split phase induction motor

    Capacitor start induction motor 

    Capacitor start capacitor run induction motor

      •Shaded pole induction motor

image

•Shaded pole motor looks like a transformer with motor actually induction motor is a rotating transformer.

•An auxiliary winding is copper ring surround each pole added with main winding for starting purpose.

•When the current flows through auxiliary winding it produces flux which is unequal.

•Flux in shaded pole and in unshaded pole opposes the main winding flux which rotates the rotor.

•Stator have salient poles and short circuited copper turn called shading coils.

•The rotor of shaded pole motor is squirrel cage rotor.

•Shaded pole motor is less costly.

•Split phase induction motor

image

•Split means break up or divide.

•Split phase induction motor consists of main winding and auxiliary winding or starting winding and a centrifugal switch.

•Starting winding is placed at 90 degree electrical with main winding.

•Centrifugal switch is on at starting and it splits the auxiliary field winding when the motor start running.

•Main winding have low resistance and high reluctance and auxiliary winding have high resistance and low reluctance.

•Its construction is simple.

•Capacitor start induction motor

image

•Capacitor start induction motor is similar to split phase induction motor but starting torque of split phase induction motor is less so by adding a capacitor in series with centrifugal switch and making similar electromotive force in main and auxiliary winding.

•So it makes capacitor start induction motor more costlier than split phase induction motor.

•The capacitor is electrolytic capacitor whose value is about 3 to 20 micro farad.

•Capacitor start induction motor is use where high starting torque is required.

•Capacitor start induction motor is use for fan, pumps, compressor etc.

•Capacitor start capacitor run induction motor

image

•Capacitor start capacitor run induction motor works like three phase induction motor at some point.

•Consists of two capacitor one in series with centrifugal switch (capacitor start) and one in parallel (capacitor run).

•The capacitor run is disconnect after starting of motor but capacitor run is still connected via auxiliary winding.

•This gives better power factor and improves efficiency.

•Capacitor start capacitor run motor have smooth torque and silent operation.

•It is uses where silent operation is required.

by
selected by

Related questions

1 answer
1 answer
Welcome to electronics2electrical.com, where students and teachers can ask and answer any question. Get help and answers to any engineering problem including Electrical, electronics, mechanical, telecommunication, instrumentation, computer, mathematics, physics etc. Get answers to questions. Help is always 100% free!

Most popular tags

power motor dc circuit transformer voltage current system used phase resistance factor ac load synchronous induction energy electric generator electrical series frequency capacitor between plant line speed transmission use meter type advantages difference single mosfet control function instrument magnetic amplifier problem high diode bjt machine unit source motors and diagram winding shunt field parallel define electricity torque value maximum relay arduino supply time digital armature types applications thyristor working transformers wave on flow operation three coil material instruments state ratio signal emf effect formula efficiency theorem method disadvantages starting microprocessor test operating direction controlled different logic transistor single-phase network scr loss temperature connected rc law force inductance compare measure station wire low conductor principle wattmeter full characteristics measuring constant measurement breaker losses device converter bridge linear materials nuclear matrix flux drive resistivity of machines angle switch free rectifier protection core battery solar gain thermal loop generators open circuits negative analog number lines friction reactance short gate pole inverter the conservation diesel iron resistors capacitance engineering basic direct main electronic electronics a steam induced relays hysteresis universal transducer computer feedback using range distribution work secondary igbt algebra pmmc plants factors capacitors dielectric controller regulation systems design air fault components rotor cable starter oscillator eddy alternator application semiconductor ammeter rl average forces damping rlc connection zener electromagnetic biasing minimum insulation pressure balanced permanent moving errors running copper self impedance stability quality start ideal curve over commutation 3-phase arc permeability peak bias error fuzzy commutator conductors superposition density mechanical rotation construction measured electrons charge memory inductive transfer explain fuse methods off back is three-phase tariff locomotive installation welding heating rms surge rating generation potentiometer coupled shaded rate capacity storage adc excitation active two pure harmonics reluctance microcontroller voltmeter inductor internal 8085 cro reaction insulating overhead hydro resonance traction definition breakers earth neutral designed

9,175 questions

7,920 answers

152 comments

3,290 users

9,175 questions
7,920 answers
152 comments
3,290 users