Kelly controllers generally great or horrible?

[carbon.nanotube.capacitor]

Does anyone have experience with using and or programming Kelly controllers? I'd like to buy one for it's flexible voltage and current range, as well as the programmability and variable-regen. But if I'm going to shill out $290 US I want to know it'll be a non-regret type of situation. :wink:
Also does anyone know where to get throttles that rotate in both directions, one way for acceleration and the other way for deceleration? Thanks in advance!

 

[Jozzer]

I'll vouch for them, programming is easy, and controllers seem reliable. Steven at Kelly offers reasonable support too.

 

[markcycle]

My experience has been good with Kelly using there brushless controllers. Though I wish they would control based on battery current instead of armature current. They stand behind the product, if it fails they replace very quickly. Steven does try to help with questions and problems.

Mark

 

[Mathurin]

Hey mark,

Would you describe how armature current limiting feels as you ride around, say by opposition to pwm control or battery current limiting, or something? Tho, I'm guessing your will to have battery current limiting has more to do with lead battery current draw rather then bike feel.

 

[markcycle]

Hey mark,

Would you describe how armature current limiting feels as you ride around, say by opposition to pwm control or battery current limiting, or something? Tho, I'm guessing your will to have battery current limiting has more to do with lead battery current draw rather then bike feel.

First I'm using LIFEP04 48 volt 60Ah HI POWER brand with my motorcycle

The reason I don't like limiting on phase is lower starting torque since its peak phase current they limit on you can see the battery current rise as the duty cycle increases. So if you want to have say 100 amps max battery current, you only can get it at max speed not at starting. They do have a feature called limiting on high duty which tries to lower the current as the duty cycles increases (so you can get higher starting current) but its a approximation, a open loop try at mimicking battery current limit. I've been experimenting with balanced and speed regulation they offer in the user interface. I'm liking balanced better than torque and speed but still experimenting. In the end I'm going to put a servo loop around the controller and regulate on battery current. I hope this explains why I would prefer regulation on battery current. The only positive about phase current limiting is it limits motor heat by lowering the battery current when the motor is turning slow, this is when a hub motor is least efficient and wasting much of the current as heat.

hopes this answers the questions

Best
Mark

 

[Microbatman]

Hey mark,

The reason I don't like limiting on phase is lower starting torque since its peak phase current they limit on you can see the battery current rise as the duty cycle increases. So if you want to have say 100 amps max battery current, you only can get it at max speed not at starting. Mark

Great info
Methods says he is getting 190 amps of launch current from his Kelly and his is 220 amps
Question: What Kelly controller can provide more start up/launch current than a digital Crystalyte48A72V 4110Mosfets ?
Does anyonne know if Kelly changed the programing to overcome this strart up launch issue?

 

[markcycle]

Hey mark,

The reason I don't like limiting on phase is lower starting torque since its peak phase current they limit on you can see the battery current rise as the duty cycle increases. So if you want to have say 100 amps max battery current, you only can get it at max speed not at starting. Mark

Great info
Methods says he is getting 190 amps of launch current from his Kelly and his is 220 amps
Question: What Kelly controller can provide more start up/launch current than a digital Crystalyte48A72V 4110Mosfets ?
Does anyonne know if Kelly changed the programing to overcome this strart up launch issue?

Get a 200 or 300 amp Kelly (KEB72601) use limiting on high duty which tries to lower the current as the duty cycles increases (so you can get higher starting current) but its a approximation, a open loop try at mimicking battery current limit. It works OK and you can get 100 amp plus starting current no problem.

Right now with my new motor I get 135 - 150 amps starting current.

http://endless-sphere.com/forums/viewtopic.php?f=10&t=7718

In my opinion The kelly controller is the best value right now for a high end controller and the support is excellent.

Mark

 

[Microbatman]

markcycle

Thanks for your answer. Appreciate your knowledge and sharing it. You da man.