According to historical data, DC motors are 50-60% more efficient than AC motors. Then also at maximum places we Indian use the AC appliances. We use AC fans, AC pump and many more……..
We decided to first prove result of DC appliances and then aware others. We started with DC water pump. There was one non-functional quarter hp AC water pump was available in our scrap yard. It was decided to replace AC motor with BLDC motor. To select right BLDC motor for required torque and RPM calculations were done. The brush-less motors are effective due to its less maintenance because of absence of brushes.
I replaced AC motor from AC water pump with DC motor and coupled it with the help of flexible coupling.
The assembly some hoe looks like:
We then further proceeds to to trial. The trial was tremendously good. We all satisfy with the result. You can find the trial Video below: