What types of electric motors are used for water pumps? Stepper Motors for extruders

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What types of electric motors are used for water pumps? Stepper Motors for extruders

Depending on the size of pump, there can be either three phase induction machines, or single phase induction machines.

The three phase variants will be squirrel cage due to their maintenance free nature, and mostly constant speed of operation. The same goes for single phase machines, but they will be more suitable for household pumps, in scale of few hundred watts to few kilowatts.

You may use DC machines, with shunt machine more suitable for constant speed application. I don’t believe you would require a very high starting torque, but if so, a combination of series-shunt arrangement can be used. In this case, apart from a reliable DC source (motor drives are easy solutions, both for AC and DC motors), and an arrangement to configure the motor as a series machine first (high starting torque configuration), and then convert the same machine into shunt (constant speed application).

But by my knowledge, DC machines are hardly used in deploy and forget situations.

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