bldc torque and speed control

[sdecorme]

Hi,
Actually I drive a DC motor in speed and torque at the same time.
I would like to know if there is a solution to do the same with a bldc.
The motor is 50W max.
I can make a custom PCB to use a bldc driver, hall effect input and analod input.
Thanks for your help

 

[KlausST]

Hi,

Out of curiousity I just did an internet search. On the first page I got good hits with dicuments about theory, dedicated BLDC driver manufacturers, datasheets....

Seems your question could be answered with a "yes".

Klaus

 

[BradtheRad]

The genius of the PMDC motor, is that the force which spins the armature also pulls the next winding into position so it's energized... creating the force which spins the armature.

As the load tends to slow the motor, each winding automatically has longer time to admit increasing current. This adjusts torque in response to the load.

Your brushless control circuit must duplicate the same action. Each current burst shall be intense enough, for a long enough time, so it continues to spin the armature.

 

[danadakk]

Post # 4 starting design .....sensorless ?

https://www.electro-tech-online.com/threads/low-speed-high-torque-bldc-driver-design-working-on-driver-for-a-hub-motor-24v-supply-170mm-wheel-15-pole-pairs-1-7ohm-high-torque-low-speed.163838/#post-1426573

Regards, Dana.