BLDC Motor driver supports sine wave and square wave

Hello Passerby,

Please check TI Designs. You may get more options on different controllers.

www.ti.com/.../refdesignsearch.tsp

Regards
Amit

passerby said:

Could you give me some suggestion?

There's a wealth of literature - this vendor and ALL others - and Google proves, "treasure trove."

BLDC is far more complex than Brushed or Stepper Motor - you've not "made the case" for adding the complexity demanded by BLDC.

The specification - as presented here - is beyond vague.   (thus w/out any real value...)

Hello cb1,

I agree with you. BLDC application needs more clearer definition. Spinning a motor is not the problem. But to spin it for what is more important.

Regards
Amit

Hi Amit,

Indeed - again & again (famed) "KISS" is "kicked to the curb!"

Getting a 3 phase, BLDC motor to work - and to remain working - and fully/properly/safely controlled - demands multi-disciplinary tech knowledge & experience. (e.g. NOT a "first project!")

Poster's "spec" is better than nothing - (but not by much...)

Learning & building skills by "starting with small hill" (brushed motor) rather than "Kilimanjaro" (BLDC) - ALWAYS proves best!

cb1- said:

Getting a 3 phase, BLDC motor to work - and to remain working - and fully/properly/safely controlled - demands multi-disciplinary tech knowledge & experience. (e.g. NOT a "first project!")

 And also require all knoledge about EMC and vibration of system, yes it can be driven as if it is a stepper, also stepper motor are synocronous multiphase motor, but square wave multiphase is acceptable at low speed, for BLDC is not acceptable at all due to big force and torque applied to rotating part.

 Also to spin up a BLDC or rotor wound too from traditional three phase line some deep knowledge are required, so launch motor or startup network, otherwise motor and line network too get damaged/destroyed on power up.

 ACIM can tolerate square wave but we know is no more correct drive method and can just be used on first approach on tech course to see how it work magnetic rotating field. Here concept of slip need be undertood.

 Also spinning a stepping motor is not so trivial than appear and when speed up or microstep get same near complexity of BLDC with a 4 way bridge and current control than hobby mode square wave nor speed ramped with undetected stall risk.

Hi Roberto,
If Amit & I had not "succeeded" in "scaring poster away" - that door has (now) opened (even) wider...

cb1_mobile said:

Hi Roberto,
If Amit & I had not "succeeded" in "scaring poster away" - that door has (now) opened (even) wider...

 Hi CB1, this is dependent on poster intention, time ago I got a silly discussion of I think a young boy, this guy insisted on his  <<golden motor>> can be spin at twice the nominal RPM (3000), his answer when I asked him about Inertia and energy it answered it seen on internet the motor of bike of his brother running @12Krpm so why a bldc cannot run @6K rpm?

 This is the trouble we can encounter this arena..  Genius  was on instaspin forum.....

Roberto Romano said:

this is dependent on poster intention

Does not poster's "specification" provide great insight into his "readiness" for such a project?