esc efficiency compared to motor.

General topics and discussions about the VESC and its development.
Hummie
Posts: 105
Joined: 10 May 2016, 04:05

esc efficiency compared to motor.

Postby Hummie » 05 May 2017, 06:08

how efficient is the vesc compared to a motor on an electric board?

Ryan Wallace
Posts: 5
Joined: 17 Feb 2017, 03:24
Location: Ottawa Canada

Re: esc efficiency compared to motor.

Postby Ryan Wallace » 05 May 2017, 14:45

I assume that FOC is a more efficient way to drive a motor. If not then what's the point? Why not just use a cheap trapezoidal ESC? Can anyone give any anecdotal evidence that this is the case?

Hummie
Posts: 105
Joined: 10 May 2016, 04:05

Re: esc efficiency compared to motor.

Postby Hummie » 09 May 2017, 06:50

I was wondering the losses in the Vesc compared to the motor or now that it's brought up how about also compared to hobby part esc? What would be the losses at half duty cycle vs full for both the vesc and motor, generally?

markorman
Posts: 14
Joined: 25 May 2016, 11:35

Re: esc efficiency compared to motor.

Postby markorman » 09 May 2017, 07:55

Ryan Wallace wrote:I assume that FOC is a more efficient way to drive a motor. If not then what's the point? Why not just use a cheap trapezoidal ESC? Can anyone give any anecdotal evidence that this is the case?


If the motor has sinusoidal BEMF then FOC is better, but it the motor has trapezoidal BEMF, six step commutation is better in efficiency.

Hummie
Posts: 105
Joined: 10 May 2016, 04:05

Re: esc efficiency compared to motor.

Postby Hummie » 09 May 2017, 18:10

Seems a typical bldc motor will have some semblance of trap and sine and it's complicated

http://www.motioncontroltips.com/faq-si ... l-current/


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