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How to start BLDC motor only 1 turn with max torque and power

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cmcraeslo:
Hey guys.
I have a BLDC motor that I want to turn 360 degrees (only one rotation).
I'm looking for the most efficient way (fast/powerful) to drive it directly while loaded.
What would be the best strategy to make that happen? There are no hall sensors installed, but I can probably fit them somehow if that is needed.
Motor is rated at 2kW and will be running at 48V.
Gearbox and reduction is not possible.

Siwastaja:
BLDC motor control is worth complete books. It's been written about widely. A lot of freely available appnotes and tutorials.

Start by Googling and when in doubt, feel free to ask any specific question.

Sensing the absolute rotor angle directly (hall sensors or otherwise) makes things much easier by removing sensorless estimation logic requirement so if you can add the sensors, do it. With sensors, there is absolutely no difference between "starting" or running at higher speed, it's all fairly simple.

Benta:
You have the completely wrong motor for this application
 A BLDC motor without commutation feedback is difficult to start already, and very, very, very difficult (read: impossible) to start under load.
And even if you add Hall-sensors, angle precision will be miserable, position stability as well.

Look for a stepper motor instead, this will do what you want.

thm_w:

--- Quote from: Benta on July 28, 2020, 07:01:46 pm ---Look for a stepper motor instead, this will do what you want.

--- End quote ---

2kW stepper motor?
This is the biggest one I found: https://www.omc-stepperonline.com/nema-42-stepper-motor/dual-shaft-nema-42-cnc-stepper-motor-30nm-4248oz-in-8a-110x201mm-4-wires.html

Anyway, need more info from OP, why is a gearbox reduction not possible? RPM/torque?

cmcraeslo:
Hello guys.

To be completely honest, the title is a little misleading.
I actually have round linear motor that has 3 coils on the outside + N/S magnet pairs in series on the rod.
This is what i'm trying to move.

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