The MAD MAX e-car

[Floor]

Rotoverters are typically used to convert single phase to three phase
electricity.

Three phase electicity is desireable in industrial applications using electric
motors (it is more efficient the single  phase).
Note.. more efficient for motors, but not more efficient for ohmic heating.

Three phase is generally not available / provided, except in commercial and industrial
parts of a city or region. 

Industrial equipment commonly, is equiped with three phase motors.
If three phase power is not available at the location at which the equipment is
installed, a single rotoverter might be used instead of replacing the three phase
motors on several pieces of machinery.

This is a short term savings, but also  a long term increase in costs.

Using a rotoverter to run a three phase motor on single phase, is even less
energy efficient than using a single phase electric motor.

... ... ... ...

It is more efficient to use the electricity from solar pannels, wind mills and other
kinds of electric power sources directly into the motors and so on
(as that electricity is being produced).
                                    because
Energy is wasted / converted to heat when an electric cell or battery is charged. 
How much is wasted depends upon the type of cell. Then again, heat is produced
(in the battery) / energy is wasted during battery discharge. 

As much as 50% +-  can be wasted this way ?

[lancaIV]

https://www.oeko.de/fileadmin/oekodoc/Smarthome-Stromverbrauch.pdf

https://translate.google.com/translate?sl=auto&tl=en&u=https://www.oeko.de/fileadmin/oekodoc/Smarthome-Stromverbrauch.pdf




It is more efficient to use the electricity from solar pan(n)els, wind mills and other kinds of electric power sources directly into the motors and so on(as that electricity is being produced).

                                                                         





For the Vale http://www.habiter-autrement.org/12.energies/16_ener.htm electric consume lights, appliances and cooking 1,200 kWh


https://oeko-energie.de/energieberatung/index.php Standart Household Intelligent Household


and/or mtbest.net the e-consume




how ,floor,do you controle a. the peak/inrush current during inertia phase and b. how do you calculate the VA need ?





electric-motor rated W x 6-10 inrush phase                   or x3 with inrush current limiter  ( Dirac surges )          and


                                                    the appliances seriell or parallel in use ?





                             500 W rated power = 3000-5000 W inrush phase demand !


                             100 W incandescent bulb = up to 200 times the rated value




homebus-engineering from the 80´:


https://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=20&ND=3&adjacent=true&locale=en_EP&FT=D&date=19831208&CC=DE&NR=3221505A1&KC=A1


https://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=0&ND=3&adjacent=true&locale=en_EP&FT=D&date=19950529&CC=ZA&NR=947569B&KC=B

[Floor]

It is more efficient to use the electricity from solar pan(n)els, wind mills and other kinds of electric power sources directly into the motors and so on(as that electricity is being produced).

                                                                         

...   

             Your out of context quote  =  a misquote

     actual quote / complete quote is
It is more efficient to use the electricity from solar pannels, wind mills and other
kinds of electric power sources directly into the motors and so on
(as that electricity is being produced).
                                    because
Energy is wasted / converted to heat when an electric cell or battery is charged.
How much is wasted depends upon the type of cell. Then again, heat is produced
(in the battery) / energy is wasted during battery discharge.

As much as 50% +-  can be wasted this way ?

[lancaIV]

I see a problem :


electric power sources directly into the motors and so on


It is an energy ,here electrical, management and network controle issue !


an example :


http://www.habiter-autrement.org/12.energies/16_ener.htm


lights, appliances and cooking 1,200 kWh



1975 efficiencies !


1200 KWh /365,25  days = 3280 Wh electric consume per day











with 2021 conventional electric magnet motor and LED/+controler and  cooking related : heatelement/controler reduceable to


                                            2400 Wh electric consume per day / 24 h


                                   = 100 W net per hour electricity generation and storage = 2400 VAh battery




with a detailed appliances units list we can calculate the reducement potential,inductive or resistive or conductive unit 




        2400 Wh can be the consumption from 10 000 W and more rated appliances,but only short time working :


toaster each 4-5 minutes   800 Watt rated but +- 70 Wh per use cycle


coffemachine 5-7 minutes 1500 W  rated but  +- 150 Wh per use cycle


et cetera


hot water boiler 4-5- minutes


baking owen  1/2 hour - 2 hours +


mixer


bread baking machine


fridge 100 W rated motor but in average 800 Wh per day consume


..............







battery set total input /output efficiency ?


http://www.bticcs.com/


https://www.powertechsystems.eu/home/tech-corner/lithium-ion-battery-advantages/#:~:text=Lithium%20batteries%20charge%20at%20nearly,gets%20covered%20up%20by%20clouds.

[Floor]

Partial quote continued

how ,floor,do you control a. the peak/inrush current during inertia phase and b. how do you calculate the VA need ?

electric-motor rated W x 6-10 inrush phase                   or x3 with inrush current limiter  ( Dirac surges )          and


                                                    the appliances seriell or parallel in use ?

                             500 W rated power = 3000-5000 W inrush phase demand !

                             100 W incandescent bulb = up to 200 times the rated value

homebus-engineering from the 80´:

Yes I agree, you are correct Lanka.

Peek current flow due to inrush is caused by the motor starting circuits (in appliance motors)
in order to over come inertia.

Initially / typically, an electric motor needs more current to get it up to speed when it
is first started. 

Also a slow turning heavily loaded motor may draw more amperage than when it is running
at its designed for RPMs.

Incandescent lights and electric heaters, have a low electrical resistance before they reach operating temperature and  initially /  briefly draw high amperage.

                  Example Problem

1 million people in a city, arrive at home from work within a 30 minute time span
and turn on their air conditioners and an electric tea pot.  During that 30 minute time
span, the electrical grid may requite several times the normal electric current, due to a
very large number of air conditioners starting simultaneously (start up current).

Large electric power generating plants cannot rapidly react to sudden demand increases.
They are built to produce at a constant power rate. Whether that power is needed or not.
Whether that rate is sufficient to the load or not.

The power supply lines are designed with a maximum sustained current flow.  They can
handle larger flows but only briefly, before they over heat or circuit breakers trip.

Smart power grids can only do so much to alleviate the problem unless individual
homes and / or appliances are communicating with the grid and delaying and sequencing
their motor start ups and so on.

   edit / more
Building power plants large enough to accommodate peak current flows is wasteful.
Burning fuel at a rate which is higher than typically needed is not good.

Most power plants operate at one speed only / one power production rate only. They are
designed to be "efficient" unto their selves within a certain rate of steam turbine speed /
fuel consumption rate and so on.

Solar and wind tech are intermittent.  They are most efficient as point of use and time
of production use.

regards
   floor