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how 5Kw source i.e from solar power source , when connected to 20 Kw motor

how 5Kw source i.e from solar power source , when connected to 20 Kw motor

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Old 04-14-18, 01:43 AM
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how 5Kw source i.e from solar power source , when connected to 20 Kw motor

Can we connect 5Kw solar power source to 20 Kw (max 25kw) direct drive motor ?? how it works can anyone explain this ...????
 
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Old 04-14-18, 01:53 AM
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It wouldn't. It would be like trying to fill a swimming pool with a single five gallon bucket. You would need a battery to run the motor and turn the motor off when depleted till the solar cells had again charged the battery sufficiently.
 

Last edited by ray2047; 04-14-18 at 06:41 AM.
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Old 04-14-18, 01:53 AM
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Of course you can. You can also connect a flashlight battery to a car. Neither one will do anything, but you can connect them.
 
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Old 04-14-18, 06:39 AM
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The motor would behave like a dead short. The master breaker for the solar panel system will probably trip within a few seconds of turning that motor on. Just prior to the breaker trip, the voltage supplied by the source (combination of panels and batteries) will have dropped greatly, perhaps to around twenty volts. Even with such a voltage drop, it is still possible for the number of amperes flowing to cause some part of the solar panel system to burn out if there was no master breaker. The alternative exists where the current can continue to flow but is not enough to trip the breaker and also not enough to burn out anything but the motor would not be operating correctly and might not be turning at all.

At all times in any portion of any circuit the voltage across any two points in the circuit equals the current flowing between those two points times the resistance between those two points. (For alternating current circuits, voltage and current and resistance need more complicated math to express or compute or analyze, notably using what is referred to in high school Algebra II as complex numbers or by drawing on paper arrows of different lengths pointing in different directions..)

Since the power soucre can deliver only so many amperes and the resistance of the motor is such that at 120 volts a greater number of amperes if available would flow, the voltage would drop to the point where the statement (Ohm's Law) in the second paragraph became true.
 

Last edited by AllanJ; 04-14-18 at 07:04 AM.
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