hydra 240 hv

[Gary]

Hey guys ! Its Sat. night and im trying to program my Hydra 240 HV through the Link. I came to the section of " Current limiter" . What is this for?

[Boatman]

It is for you to turn off! Really.

[andym]

It is for you to turn off! Really.

I agree, no place for it on FE applications and I can not work out why they left it as an option.

[domwilson]

Found this here..http://www.rcgroups.com/forums/showthread.php?t=848120

The current limiter built-in on the Phoenix line uses an A/D measurement of the voltage drop across the low-side MOSFET to determine the amount of current flowing through the MOSFETs... so it's really not a current limit, but rather a dissipation limit for the MOSFETs. The samples are taken 1/2 way through the "on" cycle of the PWM.

In practice, if the MOSFETs stay cool, the controller will current limit at around 2 times the rated current of the controller. As the controller warms up, the resistance of the MOSFETs increases, and the current limit drops to a lower current level. At maximum controller temperature, the current limit is near the controller rating.

While it is not always 100% effective in preventing damage to the controller (there are setups where the controller will be damaged BEFORE the current limit jumps in to protect the controller) the current limit will protect the controller in most situations.

The Phoenix-ICE series will have direct current measurement with shunt, high performance amplifier and high accuracy A/D. The ICE series will have a user settable current limit (we'll see how much people abuse that!!!) However, even that type of current measurement (or even hall sensor based measurements) aren't always fast enough to protect the controller in ALL possible situations.

Patrick"

But it relates to the Phoenix ICE controllers.

[BakedMopar]

I use the limiter function on my ice. I don't turn it off but run it insensitive. It cuts out when too much amps are drawn with too much prop.

[Ub Hauled]

I am not sure how the limiter works, but I thought about it for some time and figured that the spikes on the ESC would trigger the limiter out of the hole generating cogging like effects (really annoying)... if you decide to leave it on, I am sure it'll turn you into a more careful driver.... I leave it off in all my applications.

[domwilson]

If I remember correctly. When the hydras first came out, there was an issue with them cutting out on full throttle. It was recommended to turn the limiter off and that seemed to fix the problem. I have mine turned off as well.

[Gary]

Great !! I will do the same.I ask because im running 45-90c batteries that put out 520 amps at 90c so theres no room for error this time! I will also give Castle a call Monday aswell. I taking all the protective measures i can so this ESC makes it down the lake with no smoke LOL. My luck has been in the toilet this year.

[Gary]

Great !! I will do the same.I ask because im running 45-90c batteries that put out 520 amps at 90c so theres no room for error this time! I will also give Castle a call Monday aswell. I taking all the protective measures i can so this ESC makes it down the lake with no smoke LOL. My luck has been in the toilet this year.