Maximum temperature in a Crystalyte 5306 ?

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soaresdacosta   1 kW

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Maximum temperature in a Crystalyte 5306 ?

Post by soaresdacosta » Mar 07 2015 1:15pm

Hi guys,

Today I ride 10Km in my bike, no pedaling, and at the end of the ride, my temperature meter, shown my Crystalyte 5306, at 85ºC. I can smell the heat... Today, was a sunny day, maybe 20ºC.
So, the question is... Whats the maximum safe temperature for this old-school X5 ?

Thanks for the help,
Luís.
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Ypedal   100 GW

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Re: Maximum temperature in a Crystalyte 5306 ?

Post by Ypedal » Mar 07 2015 1:17pm

I've seen 120 celcius measured at the stator so far without any obvious issues. ( other than the smell lol )
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soaresdacosta   1 kW

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Re: Maximum temperature in a Crystalyte 5306 ?

Post by soaresdacosta » Mar 07 2015 1:32pm

Ohhh.... 120ºC is good :mrgreen: :mrgreen:

Luis.

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Re: Maximum temperature in a Crystalyte 5306 ?

Post by BLUESTREAK » Mar 08 2015 7:23am

I am not so sure about 120'c, my 5306 at 72 volts pulls my meridian trike at about 475 lbs with me in the seat total .and I have never seen it any hotter than 126 degrees taken at the axel and I run it hard as well and I live in (hot fl. usa.

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dogman dan   100 GW

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Re: Maximum temperature in a Crystalyte 5306 ?

Post by dogman dan » Mar 08 2015 8:04am

I'm not sure what 120c is in F. Because of the slower speed of a 5306, you might find it very hard to go fast enough, long enough, to get that motor very hot. But a steep enough hill can warm it up.

In F, you will never damage a motor below 200F, You wont' even see the coils brown. At 250F you might smell some wire toasting, but it will still run. But you could have a weak hall sensor fail at such a low temp. Good halls will take it no problem.

300F, now you could be damaging a motor. Definitely you'd be blackening the windings. Buy 451F, you are turning the strings that tie down the winding wires to ash, solder is melting, flames are shooting out vent holes if you have them.

I'd say try to stay below 250F, inside the motor.

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Re: Maximum temperature in a Crystalyte 5306 ?

Post by Mundo » Mar 08 2015 8:52am

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soaresdacosta   1 kW

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Re: Maximum temperature in a Crystalyte 5306 ?

Post by soaresdacosta » Mar 08 2015 9:57am

Hi guys,

Thanks for the help.
I'm not saying that I will push the temperature to 120ºC. I don't no, if, its possible.
Yesterday I did a very hard push on the motor, and the maximum temperature I see was 85ºC. I'm just asking, more or less, whats the top limit temperature. 120ºC looks good.

Luis.

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spinningmagnets   100 GW

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Re: Maximum temperature in a Crystalyte 5306 ?

Post by spinningmagnets » Mar 08 2015 11:25am

When you said the temp was 85C...was that the inside of the motor on the stator (the hottest part), or...was it a measurement of the heat coming off the side-plate?

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Re: Maximum temperature in a Crystalyte 5306 ?

Post by BLUESTREAK » Mar 08 2015 12:50pm

HI AGAIN, 85'c is 185'f

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soaresdacosta   1 kW

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Re: Maximum temperature in a Crystalyte 5306 ?

Post by soaresdacosta » Mar 08 2015 1:08pm

Hi spinningmagnets,

It was measure, inside the motor, with a temperature sensor on the coils.
On today ride, I see 65ºC to 80ºC, after some good hills.
Luís.
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Kyle201   10 W

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Re: Maximum temperature in a Crystalyte 5306 ?

Post by Kyle201 » Mar 08 2015 6:12pm

Just the other week I asked Justin (yes the Justin) about what temp would be safe for my Crystalyte H4060.. and he told me that for most motors 200C is when things start cooking... which seems really high? I have my CA max temp set to 150 right now to be safe... and obviously getting just over 100C your magnets become less effective in addition to a lot of added winding resistance. I've gone up to ~140 so far with no apparent issues.

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Re: Maximum temperature in a Crystalyte 5306 ?

Post by teklektik » Mar 08 2015 7:01pm

justin_le wrote:Motors don't really "cook" until they are upwards of 180 degrees or more. It's actually staggering how hot they can get without actually damage to the windings. But the motor efficiency at this kind of temperature is very poor, so there isn't much point in allowing it to get that hot in the first place, which is why we'd usually suggest in the 110-140 oC range as being appropriate for thermal rollback.

If you want to push it as hard as you can and don't give a rats a__ about consumption and motor efficiency, then I'd set the start of thermal rollback at about 150oC and the end at 180oC.
As with most silicon devices, the popular Honeywell SS411A hall has a max operating temperature of 150C. Exceeding this temperature may be possible without damaging motor windings, but your halls are going to be taking a beating. The CA V3 default max temperature is 130C.
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