Rimwithbrim
1 µW
- Joined
- Feb 13, 2019
- Messages
- 4
Hi All,
Complete newb here. I am working on a project that involves driving a 5-10kw hub motor. I am having some difficulty figuring out what motor controller to use though. I have been doing some research and have some ideas but I thought this might be a great place to see if some season veterans in this arena could give me some guidance. I'm worried I am having some nomenclature misunderstandings... I have two main requirements:
-Torque control scheme-where I am able to hold a throttle position and the torque will remain more or less constant at that setting while the rpm of the hub motor varies to accommodate the load encountered by the hub motor. Speed control is at the bottom of the list in terms of control needs or should be secondary. This application is similar to a constant tension device for a paper mill etc. where the diameter of the roll changes but the paper needs to be put on evenly tension wise.
-Proportional regenerative braking to near zero speed rpm- I need the controller to be able to provide braking proportionally by an input signal (preferable with something simple like a potentiometer). In this application the motor will be used as a brake which provides constant tension at 70% max torque load for about 5-7 mins of time while turning roughly 100-200rpm give or take. Pretty demanding I know...
The motor will be a hub motor designed for scooter with hall sensors by QS.
72-84v and about 5-10kw depending on motor. Expected amperage will be in the neighborhood of about 100-150.
I have spoken with the kelly controller people a little bit and it seems like they may have a controller that will do this but I am having a hard time understanding if this torque mode is possible. Kelly has stated it is a speed control loop only while the motor company I'm speaking with has suggested that the kelly controller can operate in the torque scenario. I had to explain it a little differently using a scooter going along a flat surface at a constant throttle and then encountering a hill...will it slow down to match the throttle setting or remain going the same speed? The motor people suggested the motor will slow down if the scooter encounters a hill. I'm having a hard time thinking these controllers would operate any other way but when I hear speed control loop it makes me think it will hold a constant speed at a certain throttle setting?
Before I drop the $1500 on motor and controller, I want to be sure I know that I haven't miss communicated or misunderstood something (highly likely knowing me )
Can anyone confirm or direct me to a controller company that makes something that will work in the torque modes? The one being suggested to me currently is (KLS96601-8080H) I am fine with buying something slightly overkill to deal with power requirements for regen etc. as reliability is at the top of my list.
Thanks much in advance!
J
Complete newb here. I am working on a project that involves driving a 5-10kw hub motor. I am having some difficulty figuring out what motor controller to use though. I have been doing some research and have some ideas but I thought this might be a great place to see if some season veterans in this arena could give me some guidance. I'm worried I am having some nomenclature misunderstandings... I have two main requirements:
-Torque control scheme-where I am able to hold a throttle position and the torque will remain more or less constant at that setting while the rpm of the hub motor varies to accommodate the load encountered by the hub motor. Speed control is at the bottom of the list in terms of control needs or should be secondary. This application is similar to a constant tension device for a paper mill etc. where the diameter of the roll changes but the paper needs to be put on evenly tension wise.
-Proportional regenerative braking to near zero speed rpm- I need the controller to be able to provide braking proportionally by an input signal (preferable with something simple like a potentiometer). In this application the motor will be used as a brake which provides constant tension at 70% max torque load for about 5-7 mins of time while turning roughly 100-200rpm give or take. Pretty demanding I know...
The motor will be a hub motor designed for scooter with hall sensors by QS.
72-84v and about 5-10kw depending on motor. Expected amperage will be in the neighborhood of about 100-150.
I have spoken with the kelly controller people a little bit and it seems like they may have a controller that will do this but I am having a hard time understanding if this torque mode is possible. Kelly has stated it is a speed control loop only while the motor company I'm speaking with has suggested that the kelly controller can operate in the torque scenario. I had to explain it a little differently using a scooter going along a flat surface at a constant throttle and then encountering a hill...will it slow down to match the throttle setting or remain going the same speed? The motor people suggested the motor will slow down if the scooter encounters a hill. I'm having a hard time thinking these controllers would operate any other way but when I hear speed control loop it makes me think it will hold a constant speed at a certain throttle setting?
Before I drop the $1500 on motor and controller, I want to be sure I know that I haven't miss communicated or misunderstood something (highly likely knowing me )
Can anyone confirm or direct me to a controller company that makes something that will work in the torque modes? The one being suggested to me currently is (KLS96601-8080H) I am fine with buying something slightly overkill to deal with power requirements for regen etc. as reliability is at the top of my list.
Thanks much in advance!
J