You are here

How low is "low" inductance motors?

7 posts / 0 new
Last post
shaman
Offline
Last seen: 3 months 4 hours ago
VESC Free
Joined: 2018-12-09 15:59
Posts: 60
How low is "low" inductance motors?

I see the term low inductance being thrown around here and in the industry. What value of inductance is considered low?

Also I saw that the current filter being switched in and out by the VESC 6 plus is clamied to help with low inductance motor control. At what level of inductance does this current filter make a sigifiy difference?

TechAUmNu
Offline
Last seen: 2 months 3 weeks ago
Joined: 2017-09-22 01:27
Posts: 575

I personally would consider low as anything below about 1.5uH at that point its looking a lot more like a short than a motor.

frank
Offline
Last seen: 1 month 1 week ago
VESC BronzeVESC FreeVESC GoldVESC OriginalVESC PlatinumVESC Silver
Joined: 2016-12-27 20:19
Posts: 847

yes

shaman
Offline
Last seen: 3 months 4 hours ago
VESC Free
Joined: 2018-12-09 15:59
Posts: 60

I appreciate the answers @TechAUmNu and @frank!

frank
Offline
Last seen: 1 month 1 week ago
VESC BronzeVESC FreeVESC GoldVESC OriginalVESC PlatinumVESC Silver
Joined: 2016-12-27 20:19
Posts: 847

We drove 0.7uH motors with the VESC 75/300. That's almost a short. 

perpetum
Offline
Last seen: 2 weeks 23 hours ago
VESC Free
Joined: 2020-11-02 02:28
Posts: 4

Hi Frank,

I just posted a similar question in the forum.  My motor is measured 8uH and I was concerned it is too low but seems you beat that number by far.  Did you have to do any "tricks"?  For example, increase the PWM frequency?  I am using a Flipsky 4.2 and wanted to make sure before I blow the FETs!

Thanks,

Perpetum

MargaretHoffman
Offline
Last seen: 1 year 9 months ago
Joined: 2023-02-22 23:00
Posts: 1

Everything is falling perfectly into place for Toronto's Midtown West. In under a decade, this recent Toronto segment, which procured the ac for condo unit standing of being a safe house of flimsy and deserted plants and business structures, and run-down low-end specialist homes, has transformed into an energetic metropolitan center point of a powerful city. The speed of headway in the townhouse units is high to the point that marquee land financial backers are coming in huge numbers to this area to get a slice of the pie. As a matter of fact, land specialists accept that the degree of townhouse improvement in Midtown West is cresting and posting figures which are far in front of other Canadian urban communities.