Thanks for identifying the reason for the continuous speed limitation - that it is bearing lubrication, rather than other aspects of the motor (such as winding temperature), and for sharing it. Sorry that the learning process was so painful.
I don't know that the grease is the limitation or just a symptom. I haven't totally verified that the motor wasn't damaged.Thanks for identifying the reason for the continuous speed limitation - that it is bearing lubrication, rather than other aspects of the motor (such as winding temperature), and for sharing it. Sorry that the learning process was so painful.
Yeah, their website is terrible. Automatic 4-Speed 47 RH (618) Remote Mount - GearvendorsDo they make such a thing? I don't see it on their web site. The TorqueBox wasn't cheap either
Hi lordryck,All looked good until I did take it on the highway. Performance was quite good and it didn't seem to have any trouble getting to 70mph. When I got home there was the definitely smell of something very hot. Taking things apart showed that the motor had liquified all the grease in the rear bearing. It definitely overheated. Some of you know the answer already but it was a surprise to me. The Hyper9HV has a "max continuous" limitation of 3600rpm. I haven't found any mention of this on the NetGain site, although, now that I know to look, I have found it on some of the supplier's websites. Basically, the Hyper9 + TorqueBox is good for a vehicle that will only go 40mph or less.
Just a warning before you spend your hard-earned cash on this combo. I guess I'm going to have to put the #*([email protected]^ transmission back in. Even worse I guess I better think about using 3rd at speeds over 36mph. Ugh.
More specifically, efficiency of the HyPer9 at full power doesn't vary much with speed above 1,000 RPM (as seen in performance charts published by NetGain), but running at combination of very high speed and low load will be less efficient (and therefore create more waste heat) than running at combination of moderate speed and moderate load.The HyPer 9 motor has a nominal rated speed of 3,600RPM. This is the speed at which its max continuous power of 38kW is available. The motor can spin above this speed continuously, but the continuous power rating will be lower. Considering the torque and efficiency curve, <4,000RPM is best, but I always try to keep this motor's continuous speed <5,500RPM. The HyPer 9 runs at 5,500RPM in many different applications without this issue. 7,000RPM is an inefficient speed for the HyPer 9. It's possible the highway speeds caused excessive heat in the motor or gearbox.