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-   -   Question Ice 75 Controller Resistance (https://www.wattflyer.com/forums/showthread.php?t=60027)

Merritt 01-30-2011 03:31 AM

Ice 75 Controller Resistance
 
Would like to know the resistance of the Castle Phoenix Ice 75 controller.

Thanks!!:D

kyleservicetech 01-30-2011 06:22 AM


Originally Posted by Merritt (Post 781313)
Would like to know the resistance of the Castle Phoenix Ice 75 controller.

Thanks!!:D


Interesting, CC doesn't publish that. But, the www.motocalc.com lists the Castle Creations Phoenix 75 Amps resistance as 0.0012 ohms, so suspect the ICE line is in the same area.

I've got a CC 80 Amp HV ESC, they wired this thing with #10 wire.

Since the motor windings are usually 5 or 10 times that 0.001 ohms, the actual power loss in the ESC it self would be pretty low in comparison. In fact, a lot of ESC's don't even use heat sinks on the power Fets that control the high currents involved. The ICE lines do have heat sinks, making them less vulnerable to instantaneous failure due to momentary severe current overloads.

Merritt 01-30-2011 09:15 PM

ICE 75 Resistance
 

Originally Posted by kyleservicetech (Post 781368)
Interesting, CC doesn't publish that. But, the www.motocalc.com lists the Castle Creations Phoenix 75 Amps resistance as 0.0012 ohms, so suspect the ICE line is in the same area.

I've got a CC 80 Amp HV ESC, they wired this thing with #10 wire.

Since the motor windings are usually 5 or 10 times that 0.001 ohms, the actual power loss in the ESC it self would be pretty low in comparison. In fact, a lot of ESC's don't even use heat sinks on the power Fets that control the high currents involved. The ICE lines do have heat sinks, making them less vulnerable to instantaneous failure due to momentary severe current overloads.

Thanks for the info. I'm using the factor for a Motocalc prediction myself. I spent the better part of one evening searching for the ICE spec. I wondered if the data logging apsect was creating higher than normal resistance for the ICE series, soooooo they left that spec out. :cool:
I like my CC, just speculation ;)

Larry3215 01-31-2011 12:28 AM


Originally Posted by Merritt (Post 781480)
Thanks for the info. I'm using the factor for a Motocalc prediction myself. I spent the better part of one evening searching for the ICE spec. I wondered if the data logging apsect was creating higher than normal resistance for the ICE series, soooooo they left that spec out. :cool:
I like my CC, just speculation ;)


I dont think thats the case. The only logging item that could even conceivably cause a higher resistance would be the current logging - and they use Hall Effect sensors for that, so zero additional resistance in the circuit. All other items are either calculated or based on voltage readings and fluctuations, so no added resistance there.

Also, based on my personal experience with how cool the ICE units run - even at full rated loads -Im guessing the resistances are at least as low if not lower then lower than the equivalent Phoenix series controllers.

You will be in the ball park at least using the P80 resistance. Its likely your connectors have higher resistance anyway :)

Merritt 01-31-2011 03:40 AM


Originally Posted by Larry3215 (Post 781529)
I dont think thats the case. The only logging item that could even conceivably cause a higher resistance would be the current logging - and they use Hall Effect sensors for that, so zero additional resistance in the circuit. All other items are either calculated or based on voltage readings and fluctuations, so no added resistance there.

Also, based on my personal experience with how cool the ICE units run - even at full rated loads -Im guessing the resistances are at least as low if not lower then lower than the equivalent Phoenix series controllers.

You will be in the ball park at least using the P80 resistance. Its likely your connectors have higher resistance anyway :)

Thanks for the encouragement on the ICE 75. I'll most likely never be above 50 amps so I expect it to run cool.

kyleservicetech 01-31-2011 05:05 AM


Originally Posted by Merritt (Post 781613)
Thanks for the encouragement on the ICE 75. I'll most likely never be above 50 amps so I expect it to run cool.

If you're running the CC ICE with the heat sinks, not the ICE Lite, doubt if that thing will ever be more than slightly warm at 50 Amps. I regularly run my CC Phoenix units right up to their maximum current ratings, and with some air cooling, have never had an issue with temperature rise.

Merritt 01-31-2011 05:36 PM


Originally Posted by kyleservicetech (Post 781633)
If you're running the CC ICE with the heat sinks, not the ICE Lite, doubt if that thing will ever be more than slightly warm at 50 Amps. I regularly run my CC Phoenix units right up to their maximum current ratings, and with some air cooling, have never had an issue with temperature rise.

Thats good to know.;)


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