What is the best DC motor for spinning a vortex impeller at 3000 rpm?

[lpm]

TL;DR

proper DC motor recommendation for custom project

I am looking for a recommendation on the proper DC motor to purchase for a custom project.

My project involves vortexing water using an impeller, which resides in a 1.5" OD stainless shaft residing in sealed bearings - not a whole lot of resistance, easily turned by hand. I need to spin this shaft as high as 3000 rpm. I will install a motor controller to adjust the speed, looking to experiment between 1000 and 3000 rpm. I am using homemade pulleys and a v-belt for the drive mechanism.

I currently have a 1/2 HP, 12v DC motor with running 40 running amps. This motor was a freebie, not my first choice. I am having a hard time working the right power supply to run this motor (needs high starting amps) - before I go too far down this road, I'm wondering if it's better to choose a more suitable motor. I suspect 1/2 HP is overkill - perhaps something smaller won't draw as many amps...maybe can make use of my current power supply, which outputs 30 amps.

Any recommendations as to an "educated guess" for the proper 12v DC motor that can spin this shaft/impeller up to 3k rpm would be a much appreciated.

 

[anorlunda]

A BLDC motor plus controller should be much easier to implement, and less expensive also.

Here's an example, 200w 3000 RPM, $12.

Often the controllers are sold with the motor as a package. You should be able to connect the controller to an Arduino or a Raspberry Pi to get software control.

 

[jrmichler]

Can you use or adapt a kitchen blender? Run a jumper cable to your car battery? Automobile heater blower motor?