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Any idea is my Hub dyno maxing out?

 -ww-
(@ww)
Member

I´m getting weird torque graphs and i´m wondering is my Telma CC160 hub dyno maxing out.
However rpm is rising linear.  Power supplys are Sport Devices Gen3 3.2

See Attach.

Quote
Topic starter Posted : 19/08/2021 6:34 pm
(@admin)
Member Admin

The brake is maxing out. As you can see it is at 100% for a long time. 

Are you sure the PWM settings is correct? Test using the slider and measure the voltage when at 100%. You should get close to 192V.

Also make sure to enable the option "Compensate for inertia effects during acceleration". Otherwise your readings will be too low. 

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Posted : 19/08/2021 8:34 pm
 -ww-
(@ww)
Member

Can i put maximum pulse widht up to 100% ?

Now its only 60%.

2pcs CC160 should able to brake 3200Nm from hubs and with 3.91 ratio there is only ~2200Nm now.

ReplyQuote
Topic starter Posted : 20/08/2021 6:53 am
(@admin)
Member Admin

You need to check the SportDevices PWM spec. But for sure it should be more than 60%. Max PWM duty should either be 100% or maybe slightly below. 

With 60% max PWM duty you will not get 100% brake.

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Posted : 25/08/2021 11:45 am
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