Go to Post Typed in "WaTeRgAmE" for the password and unfortunately it wasn't it. Bummer. - Kuhnahtt [more]
Home
Go Back   Chief Delphi > FIRST > General Forum
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #17   Spotlight this post!  
Unread 22-03-2011, 20:31
Kevin Sevcik's Avatar
Kevin Sevcik Kevin Sevcik is offline
(Insert witty comment here)
FRC #0057 (The Leopards)
Team Role: Mentor
 
Join Date: Jun 2001
Rookie Year: 1998
Location: Houston, Texas
Posts: 3,742
Kevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond reputeKevin Sevcik has a reputation beyond repute
Send a message via AIM to Kevin Sevcik Send a message via Yahoo to Kevin Sevcik
Re: 2011 Lone Star Regional

I'm calling BS on both sides here without some sort of verifiable data. First, the Jaguar isn't going to be terribly more "powerful" than the Victor. The FETS in the Jaguar have slightly lower on resistance, which means slightly lower power lost to heat, but it's pretty minimal and the Jag's current sense resistor probably makes the whole thing even.

Similarly, the Victor isn't going to have any quicker response than the Jaguar to a specified output voltage. They both use the same PWM rate, processing time is minimal, and I'm not going to get into whether the Jag's 15kHz chop rate would react any faster than the Victor's 120Hz chop, because you guys aren't capable of noticing that difference.

And both speed controllers are just as easy to drop metal shavings in. In case you didn't notice, the FETs on the Victor are right under that fan. The leads are exposed and just waiting for a chance aluminum shard to vaporize them.

There's only a few actual differences between the two:
1. The Victor is smaller, lighter, and more expensive.
2. The Jaguar has a more linear response curve. Meaning 20% input actually gives you 20% output. The Victors ramp up the output rather quicker than the input and then level off, so 20% input gives you something like 30% output. This may account for Paul's "quicker response".
3. The Jaguars have built in voltage rate control, which prevents you from rapidly switching between positive and negative outputs. The Grey Jaguar was likely to blow a FET driver under these conditions, which is apparently what gave the entire line a bad rep for reliability.
4. The Grey Jaguars had captive screws that were never meant to be fully removed. They left metal shavings inside the case if you DID force them to unscrew, which added to the number of failures. Which is rather more operator error than lack of robustness. Black Jaguars have fully removable screws.
5. The Jaguars have current and temperature limiting features which kick in to protect the speed controller from damage under high load conditions. The Victors will let you beat them till the breaker or the Victor blows.

And that's it until you get into the laundry list of features the Jag has that the Victor doesn't. So as far as I'm concerned the robustness of the Black Jaguar is still in the proving stage but looking good and there's little performance difference between the two aside from the linearity of the output. I think anything else is hearsay and confirmation bias unless someone's got some actual test data to back it up.
__________________
The difficult we do today; the impossible we do tomorrow. Miracles by appointment only.

Lone Star Regional Troubleshooter

Last edited by Kevin Sevcik : 22-03-2011 at 20:41.
Reply With Quote
 


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 17:38.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi