Can BLDC Technology Solve Voltage Fluctuation Issues for Domestic Water Pumps?

[Udaya Bhaskar]

Hi there,

I have spent quite some time on PF as an unregistered user reading through various stuff and have learned a lot. Just registered now to seek help on something that's been bothering me a lot and to which I haven't managed to find a solution yet.

Please let me know if this is not the right place to ask this question.

OK so the 1 HP bore water motor (I guess monoblock?) in our building has gone under the knife many times over the last couple of years and every time the electrician's explanations point to the same thing - wide fluctuations in voltage. Sometimes the motor doesn't even start because the voltage is too low.

Is there such a thing as a DC version of domestic water pumps? I ask this because I recently replaced my regular ceiling fans with BLDC fans that run at full speed without letting the variations in input AC voltage bother them and found them to be great. This got me thinking if the same thing can be applied to water pumps as well.

Is this even possible? If not, is there any other solution to the problem?

Thanks a bunch,
Uday

 

[Doug Huffman]

BLDC is Brush Less Direct Current Yes, water pumps can be driven by switching power supplies. To get equivalent power from lower voltage, the load will be higher and requiring the bore wiring replaced. Perhaps a voltage regulating (e. g., Scott-T) transformer supplying the whole building and being amortized by all the users, cheaper for an individual.