A village near by Belthangadytaluk in Karnataka has no electricity access.

[sensij]

At 220volt you will not be able to easily run it directly from a battery because 220v is not close to a standard size or easy to build up to. You will also have a problem trying to run that motor directly from solar panels again because the voltage is too high.

No! You don't need 220 V to power a PMDC motor with a 220 V rating. These motors spin proportional to voltage. Putting 22 V on a 220 V motor would allow it to spin at 1/10th the rated speed. you sometimes have to worry a bit about overheating at low speed, but if it isn't loaded too badly, it might not be a problem.

OP... the motor nameplate pictured above clearly does not belong to this motor. What is the motor's rated speed? Can you provide more accurate nameplate data?

[gsyed]

that pic was googled one!! actually its my debate topic (in assignment) on it.. hears the complet question.
A village near by Belthangadytaluk in Karnataka has no electricity access. Individual houses of the village are provided with a 220V, 1500rpm DC motor for ceiling fan which is powered by a solar panel. The ratings of solar panel are as follows: Solar PV module consists of 36 cells connected in series, series combination of 36 cells will provide 21.6 V.
1. Identify the number of solar panels and type of connection
2. Choose the type of DC motor best fits for this scheme of operation
3. Illustrate the schematic diagram from the source to load
4. Design the circuit to obtain speed variations in five steps
5. Justify the choice of motor among AC&DC based on efficeinecy and cost with stance

[gsyed]

this is the project undertaken by phlips company

[SunEagle]

Oh it is a class room example consisting of math, electrical circuitry and physics but not necessarily a real life example of how to power a fan with solar panels.

They want you to determine the number of 21.6v panels to get enough to run that fan from slow to full speed in 5 steps increments. There must be additional information on the fan motor besides it being 220v DC and 1500 rpm.

[gsyed]

thats all they have provided us

[SunEagle]

As sensij stated if the DC motor is a Permanent Magnet type (PMDC) you will be able to run it with less than 220volts. But if you want to run it at full speed as well as 4 lower steps you will be required to include step resistors in the circuit to change the speed along with enough voltage to get up to full speed (if that is a requirement).

You will also need to know the wattage rating of the fan motor to determine how to wire the solar panels. We could solve the problem for you but that would not help you learn. Again try to go about this as a math problem using Voltage = Current x Resistance and where you need to get the proper amount of voltage to run the fan at 5 different speeds.

[gsyed]

one last question.. how much batteries do we need?

[SunEagle]

That would depend on how long you want to run that fan when the sun isn't shining.