Hardware hack a BLDC as an AC servo motor
Vložit
- čas přidán 26. 07. 2024
- In this hardware hacking science short, we pull off a stunt with a standard, brushless DC (BLDC) motor and convert it into a brushless AC motor (BLAC). These AC drives are used extensively in robotics because of their high precision and the ability to hold a position like a stepper motor, but unlike a stepper motor or even a brushless DC motor, AC motors are incredibly smooth. We use a standard H bridge for driving a BLDC, an Arduino uno and some fancy shmancy programming footwork.
Links to the FREE lesson PWMAC, as well as Ben Taylor's FREE (thanks Ben!) Spreadsheet of Madness:
bit.ly/2VFejyg
or
jetpackacademy.com/lesson/pwm...
Check out my online courses in the "Robotics: Learn by building series" and take a tour, checking out the lessons available for free preview:
Course 1: Electricity and Electronics jetpackacademy.com/shop/robot...
Course 2: Digital Electronics jetpackacademy.com/shop/robot...
Course 3: Robotic Drives & Physics jetpackacademy.com/shop/robot...
Course 4: Prototyping & 3D printer (not available yet as of April 2020) jetpackacademy.com/shop/robot...
Course 5: Autonomous Robots (not available yet as of April 2020) jetpackacademy.com/shop/robot...
Check out my workshops and see if there's one scheduled in your area:
techvalleysciencecentre.com
Or enroll in an exhaustive course from the comfort of your own home:
jetpackacademy.com - Věda a technologie
This was very informative! Thank you!❤
ohh myy god :)))) u are a genius i love u soooo much . I watched so many videos about FOC control and other bs but the sinusoidal explanation really made the difference . Thx again , not all heroes wear capes :)
Some wear shorts
Thanks for explaining Ian!
This is a goldmine yet to be discovered
Thank you a lot.
This information was very usefull for me.
Thank you, congratulations from Brazil.
im confused as to why its not able to go any faster? is this a limitation of how fast the arduino can go through all the steps? because i feel like it should be able to that within a fraction of a second. Otherwise this was a great video and ill definitely be building something similar in the near future!
Do you have a link for the motors?
Thank you very much for sharing ! I have a little question sir ! If you want to build an 3 phase inverter and you already use the maximum switching frequency for your microcontroller and still only get a sine wave of 50Hz but want say 400Hz for the Motor to get at it´s maximum speed do I have cut down the resolution in the sine wave pattern then ? Because you don´t have to use 255 steps.
Have a question how to make it closed loop?
Where can we find a copy of your code?
Hey sir, i want to turn my 3phase bldc into a servo for my robotic arm, can tell me which one of the videos i should watch I’m really confused by all the videos
Have you done it yet? Can you guide me because I also want to do this project. Thank you
ديما مغرب
Great video. Seems like you could get away with only 3 PWM outputs, since only drive one of the two transistors per H bridge at a time (plus a digital enable to select which of the 2 transistors to drive), unless I am missing something? Also, it appears that this example is driving the coils at max voltage (or at least high enough to overcome the load torque) - my understanding is that the typical feedback allows you to drive a BLDCM with less voltage so as to reduce power and heat in the motor, right?
hey, did you manage to do this ?
yeah i imagine this would get very hot as you dont have the inductive reactance from the high relative between the stator and rotor that the motor was designed to have