Mixer grinder ppt

How electrical energy converted into mechanical energy? The simple example for Mixer grinder using as our day today life.

1. THE PHYSICS OF HOUSEHOLD APPLIANCES
E.M.G. YADAVA WOMEN’S COLLEGE, MADURAI -14
(An Autonomous Institution –Affiliated to Madurai KamarajUniversity)
Re-accredited (3rd Cycle) with Grade A+ and CGPA 3.51 by NAAC
MIXER GRINDER
Miss.M.Preethi
Assistant professor
Department of physics
E.M.G YadavaWomen’s College, Madurai

2. HISTORY
•ThebasichistoryoftheMixerGrinder
originatesfromHerbertJohnson’sideasto
makelifeinthekitcheneasier
•Hecameupwiththeideain1908after
watchingaprofessionalbakerstrugglewitha
bowlandaspoon.
•Johnson,founderofHogartMfg,invented
thefirst80quartHogartModelMixer
Grinderin1915.

3. 1
•In1963,Mr.Mathurfloatedacompany
called'PowerControlandAppliances
Company'.Fouremployeesfrom
SiemensIndiajoinedhim.
2
•Withintwoyears,theyhadaworkable
electricmotor,andby1970,theyhad
designedasinglejarfordrymixingas
wellaswetgrinding.

4. INTRODUCTION
Whenelectricityisprovidedtoamixer
grinder,thebladesstartrotating.Amotor
convertselectricitytomechanicalenergy.A
coilisplacedbetweenmagneticfield.When,a
currentrunsinthecoil,thecoilexperiencesa
magneticforcewhichcausesittorotate.
Wattageandspeedaretwoimportant
factorstoconsiderwhilebuyingamixer
grinder.Mixerswith500wattsto
750wattsareidealforkitchenuse.Make
sureyou selectone witha
higherwattageforidealresults.

5. Parts of Mixer Grinder
Armature.
Mixer GrinderMotor.
Mixer GrinderBody Set.
Rotary Switch.
Mixer GrinderShaft.
MixerBlade.
GrinderBlades.

6. 500WattMotor.Powerfulturbo
motorforcontinuousgrinding-
500Wturbomotorthatgivesyou
thegrindingexperienceevenwith
toughingredientslikeblackwhole
gram(dal)forpreparingtastyvadas
anddosas.
3SpeedOperation....
3StainlessSteelJars.

7. Itisbasicallythedifferencebetweenmotorwatts.Simplyspeaking,
higherwattmeansmachinegeneratesmoreRPMandtakeslessertime
togrindanyitem.Thejarsarealsolargetoholdmoreamountsof
ingredientsatoncein750Wmixer,incomparisonto500W.
Why Choose750 Watts Mixer GrinderOver500
Watts?

8. Themotorusedinmixergrinderisgenerallyauniversalmotor.
Themotorhasstatorandrotor.
Thestatorismadeoflaminatedsteel.Therearepolesonthestator.
Usuallytwopolesarethere.Fieldcoilsarewoundoneachpole.
Therotor,alsocalledarmatureisalsomadeoflaminatedsteel,hasslotsandis
tightlyfittedwiththeshaft.
Rotorwindingsareplacedonrotorslots.
CONSTRUCTION

9. Endsofrotorwindingsarepermanentlyconnectedtocommutator
segments.Commutatorsegmentsarearoundtheshaftononeside.
Therearetwobrushesthatmakecontactwithtwocommutator
segmentsataparticularinstant.Asshaftrotates,thecommutator
segmentsthatcomeincontactwiththebrushesalsochange.
Fieldwindingsinthestatorandrotorwindingsareconnectedin
seriesthroughtherotorcommutator.Universalmotorcanrunon
bothACandDC.Theyhavehighstartingtorqueandspeed.

10. Motor

12. WORKING
Themostimportantthingbehindtheworkingofthemixergrinderis
themotor.Themotoroftheproductdecideswhetherthemixergrinder
willbeagoodchoiceforyou,ornot.
ForanidealIndianhomekitchen,wherethenormalgrindingisdone
onaregularbasis,youshouldlookforamixergrinderwithamotorof
atleast700Watts.

13. BYchoosingamixergrinderwithatleast700wattspower,you
caneasilyperformallyourkitchenneeds.Andalthoughyoucan
easilychooseamorepowerfulmotor,butaspertheIndiankitchen’s
perspective,a700-1000wattpowerwouldbemorethanenough.
Choosingahigherpoweredmotorcanhavehighernoiseand
vibrationswhichmaynotbeagoodchoiceforhomekitchens.This
motorpowerupthemixer.

15. Grinder’srotatorybladeswherethejarsareattached,These
jarshavesharpbladesthatmixandblendtheingredientsby
revolvingaroundtheaxisathighspeed.
Thespeedofthebladesisdeterminedbythepowerofthe
motor,andthat’sthereasonwhyyoushouldbuyamixer
grinderwithapowerfulmotor.

17. Anotherimportantaspectofamixergrinder
efficiencyisthesharpnessoftheblade.
Theperfectcomboofpowerfulmotorandsharp
bladesbuildsaperfectmixergrinderthatyoushould
buyforyourhome.

18. TheuniversalmotorworksonbothACandDC
supply.
Ithasbeencharacterizedtohavehigherpoweroutput
withasmallersizeandstartingtorquetobehighata
lowerspeedandcancarryhighloads.
Amathematicalmodeloftheuniversalmotorfora
mixergrinderisproposedanddevelopedusing
MATLAB/Simulink.Thelossesareobtainedforboth
AC&DCfeduniversalmotor.

20. Themotorisanalyzedintermsofitsefficiencyandtorque
characteristicsatvaryingspeeds.Ithasbeenobservedthatthe
efficiencyandtorquewithrespecttovariedspeedshowsan
improvementinDCincomparisonwithACfedmotor.
Inthe230VACuniversalmotorwithaspeedof18000RPM,
efficiencywillbearound52.16%andremainwillbethelosses
i.e.47.84%.
TheefficiencyoftheDCoperatingconditionismorethanthe
efficiencyoftheACoperatingconditionoftheuniversalmotor.

21. APPLICATION
Theycanbeusedforawidevarietyoffood
productsandpurposes:Mixergrindersareversatile
deviceswhichyoucanuseinyourkitchendaily.
Youcaneitherwhipvariousliquidstocreate
shakes,milkshakesandicecreamsoryou
canusethemtogrindandchopharderfooditems
suchasmeats,veggiesandnuts.

22. MAINTENANCE
Procedure to sharpen mixiejar blade.
Put 1 bowl of salt on mixiejar.
Procedure of cleaning the grinder.
On a small bowl put 3 tsp baking soda.
Add 3 tsp vinegar and mix it properly.
Brush or pin can not enter.
Make sure you are cleaning the power cable
also.
Check the mixer grinder after cleaning.

23. ADVANTAGE
Variety of food
Different Speeds
Quick and effortless
Easy to handle
Affordable price
Easy maintenance

24. DISADVANTAGE
Noisy
The sound of the mixer grinder is often very loud and irritating.
Sharp blades
Oftenwhiletakingoutthegroundfoodmaterialsfromthemixer
grinder,ifyouarenotverycautious,yourfingermightbewounded.

25. ^"Chapter 18. Feed Milling Processes".www.fao.org. Retrieved2020-08-28.
^"Chapter 18. Feed Milling Processes".www.fao.org. Retrieved2020-08-28.
^http://www.fao.org/docrep/x5738e/x5738e0j.htm#2.1 hammermills
https://www.quora.com/For-a-mixer-grinder-which-type-of-motor-do-we-use
https://mixerjuicer.com/advantages-and-disadvantages-of-mixer-grinder/
https://www.mrright.in/ideas/appliances/small-appliances/mixer-
grinder/clean-mixer-grinder-tips-suggestions/
REFERENCES

26. THANK YOU