[NSRCA-discussion] Another HV-85 question

[Dave]

Ed,

 

Snaps and abrupt throttle movements can cause very brief current spikes
easily missed by loggers (but are usually noticed if logging rate is 10x per
second or higher).  I set my CC ESC to insensitive for the current limiting,
and I've not experienced the over current beep. Odds are with high power
systems that if something goes wrong, it will happen very quickly and cause
damage before the ESC can react.

 

The PWM setting "OR" will initially use 8khz switching and then auto adjust
based on feedback to the ESC from the motor.  I've just started playing with
the OR setting, and on some setups, it may improve idle, run the motor more
smoothly (less resonance), and increase efficiency.  On other setups, it may
not make any noticeable difference.

 

Regards,

 

Dave Lockhart, Team Castle

 

 

 

  _____  

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Ed White
Sent: Saturday, June 06, 2009 6:01 PM
To: General pattern discussion
Subject: [NSRCA-discussion] Another HV-85 question

 

BTW, I'm new to electric pattern so sorry if this has been discussed and I
missed it.

I've had one, and only one, flight out of at least 40 where I landed and the
HV-85 was beeping an over current alarm (3 beeps).  Only happened once and
my data logger said it was a normal flight, max of 64 amps (but my data
logger is filtered and averaged so it would miss a spike).  Same batteries,
same prop, same everything.  The maH used and put back in on the next charge
were completely normal.  I had the current limiting set to insensitive.  I
emailed Castle and got this response:

Turn your current limiting to disabled, as you should in F3A planes. 

Joe Ford





Product Specialist





Castle Creations










Are other people disabling their current limits?  I've only had the one
flight where the HV-85 said there was an over current and I couldn't hear or
tell anything in the flight that was any different from any other flight.  I
did disable the over current but am having second thoughts.  I couldn't tell
that it ever had any effect, even on that one flight.  If it doesn't have
any effect, it sounds like a little extra protection.  I'm tempted to go
back to insensitive.

Ed

 

  _____  

From: Ed White <edvwhite at yahoo.com>
To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
Sent: Saturday, June 6, 2009 4:45:55 PM
Subject: [NSRCA-discussion] HV-85 PWM Outrunner Mode

I've been using the new version 2.12 firmware for few weeks.  Last night I
discovered that under PWM there is a new setting called "Outrunner Mode".  I
tried it today and really liked it.  The throttle response felt smoother.
The ESC was not warm after the flights and I think it cut my amps a little. 

Anybody else have any experience with this?

Running a Dualsky 12T and have both Zippy packs and TrueRC(one 10C and one
15C).  At first I thought the TrueRC had a little more top end power.  Now I
can't tell a difference.  Perhap the Zippys seem to need more break-in.
I've got 11 or 12 flights each on two packs and they just seem to be getting
better.  Internal resistance readings are running well below 5 mohms on all
twenty cells, many cells below 4 mohms on any charge.  IR seems to vary
depending on how much charge is put in them.  Have had a charge were all 10
cells were below 3 mohms.

Was going to post some data on Chris' website after I got a few more flights
on them.

Ed

 

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