Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

BLDC Commutation : Explanation required

Status
Not open for further replies.

adnan012

Advanced Member level 1
Advanced Member level 1
Joined
Oct 6, 2006
Messages
468
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,298
Activity points
4,923
hi,

Please explain the commutation sequence in 3-phase BLDC. As shown in the attached diagram , why there are rising and falling slopes?

Best Regards!
 

Attachments

  • BLDC_PULSES.PNG
    BLDC_PULSES.PNG
    197.4 KB · Views: 107

Hi,

The picture is just half of the information. Give us the link to where you found it.
We (you) need to read the context.
Currently we don't know whether it shows
* current
* voltage
* duty cycle
* anything else

Klaus
 

The slope is the di/dt = V/L where L is the coil inductance. V is the DC bus of the 3Phase brij.
Remember in a BLDC , you have the coil to coil commutation...and also, the high frequency current regulation commutation within that. Basically a 3 phase bridge is 3 step down buck converters, which control their output current.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top