Cold-E-Commuter
100 W
I have been having a problem with motor stutter and wonder if anyone has an idea why. Let's start with the specifics. I am using an Aetoma sensorless DD front hub motor. The controller is https://hightekbikes.com/shop/index.php?main_page=product_info&cPath=4&products_id=16&zenid=7dpumb5b7ml4elsoa23beeto94
All batteries have a 4mm bullet connector rated to 95A and I have checked all connections for a "soft spot". I run either a Ping 51.2V15Ah battery or a home made 74V15Ah Turnigy LiPo. Stutter happens with both when WOT at low speed and when at WOT at high speed. To further explain, when the speed is less than 10 mph I have to back off the throttle and then slowly roll it forward, as if to keep the watts to a limit. What that limit is? The stutter also occurs between 28 mph and 36 mph. If I pedal hard and get the speed above 36 mph on the 74V pack it seems like it starts from zero and accelerates to 44 mph rapidly. Does that make sense to anyone? And as long as the speed stays above 34 mph it is fine. Once it dips below, it stutters. Quite frankly dangerously so. Any help would be welcome. I can provide more info as needed.
All batteries have a 4mm bullet connector rated to 95A and I have checked all connections for a "soft spot". I run either a Ping 51.2V15Ah battery or a home made 74V15Ah Turnigy LiPo. Stutter happens with both when WOT at low speed and when at WOT at high speed. To further explain, when the speed is less than 10 mph I have to back off the throttle and then slowly roll it forward, as if to keep the watts to a limit. What that limit is? The stutter also occurs between 28 mph and 36 mph. If I pedal hard and get the speed above 36 mph on the 74V pack it seems like it starts from zero and accelerates to 44 mph rapidly. Does that make sense to anyone? And as long as the speed stays above 34 mph it is fine. Once it dips below, it stutters. Quite frankly dangerously so. Any help would be welcome. I can provide more info as needed.