3 phase hub motors with only 3 wires?

joe duerr

New Member
I have worked with a lot of 3 phase hub motors for bikes and most of them require 8 wires. 3 that power the wheel, power, ground and 3 hall that control the rotation. I have had more than one hub motor that only required 3 wires. What I need to know is how can I find a controller and or wheel that will let me do this again.
 

AHicks

Well-Known Member
Region
USA
City
Snow Bird - Summer S.E. Michigan, Winter Gulf Coast North Central Fl.
I think what you are looking for is known as a "sensorless" controller. The brand/series I'm most familiar with "KT" or "Kunteng", have both types (sensor and non sensor) available.

Electronics not my specialty by any shape of the imagination, but my understanding is the "with sensors" will get the motor started from a stop with less effort.
 
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joe duerr

New Member
I think what you are looking for is known as a "sensorless" controller. The brand/series I'm most familiar with "KT" or "Kunteng" Have both types (sensor and non sensor) available.

Electronics not my specialty by any shape of the imagination, but my understanding is the "with sensors" will get the motor started from a stop with less effort.
Thank you
 

harryS

Well-Known Member
You can run almost any 3phase motor with a sensorless controller, but a sensor typr controller can only run motors with sensors.

I've got a sensorless controller that I use with a Bafang SWXH, a smaller geared motor that does have Hall sensors. The controller don't care. It runs the motor without connecting to the sensors. Works great. Bike always started amd started smooth. If used with some of the bigger direct drive motors, I've heard some guys say to rock the bike slightly when it didn't start from a dead stop.

Umm, what controller is it. I got it from BMSBattery, and it's an S09P. It's not sine wave, but is a square wave. I understand that these work best with geared motors no higher than 5:1. If used with the BMSBattery Q100's, which are 12:1, the motors spin too fast at high speeds (25 mph) for the sensorless circuits to keep up.

PSWpower sells also sensorless controllers. Those are their higher (22A and up) models.
 

joe duerr

New Member
You can run almost any 3phase motor with a sensorless controller, but a sensor typr controller can only run motors with sensors.

I've got a sensorless controller that I use with a Bafang SWXH, a smaller geared motor that does have Hall sensors. The controller don't care. It runs the motor without connecting to the sensors. Works great. Bike always started amd started smooth. If used with some of the bigger direct drive motors, I've heard some guys say to rock the bike slightly when it didn't start from a dead stop.

Umm, what controller is it. I got it from BMSBattery, and it's an S09P. It's not sine wave, but is a square wave. I understand that these work best with geared motors no higher than 5:1. If used with the BMSBattery Q100's, which are 12:1, the motors spin too fast at high speeds (25 mph) for the sensorless circuits to keep up.

PSWpower sells also sensorless controllers. Those are their higher (22A and up) models.
thank you...