Tongxin Goldant 700c build

[Tinker]

Brilliant. Thankyou very much

 

[amigafan2003]

Just to make it clear, the Bosch device called Mercury is separate from the Speedict ebike computer/interface.

Understood - but I still want a speedict as well

 

[jerrysimon]

Ok I have tried three different Tongxin controllers with the Goldant motor and they vary from barley working with throttle only, to working but very rough/stuttering/clacking and not going to full speed.

I am uncertain how to proceed. The choice I see here is a Lyen, Ecrazyman and/or speedict.

I think I will contact Ecrazyman first. I assume I tell him what I need is one for a no halls/sensorless motor set to 36v, 12 amps max ? Do I mention about throttle settings ? will the throttle on this one be just as rough ?

Should I give him more details like cutout voltage. Cruise control would be nice

Sorry I hope I have not hijacked the thread

Regards

Jerry

 

[amigafan2003]

Jerry - the reason why I recommended a programmable controller is that very often what you set the controller to isn't what actually gets sent to the motor. What would happen if you got the controller from e-crazyman, he set it to 12 amps but when you connect it up it actually puts out 17amps?

For example setting 12 amps on my controller actually sends 17 amps to the motor. I have to set the controller to 7 amps to get t to actually send 12 amps to the motor.

Also, lvc's and stuff will change if you ever want to change battery chemistry. Your lifepo4 pack might be happy going down to 2.75v per cell but you'd never want to take lipo that far.

As far as throttle response goes - that's hardcoded on all but the very expensive controllers where you can program soft starts etc - so don't worry about it. the throttle circuit on the e-crazyman/lyen/infineon controllers are a million times better than that on the stock tongxin controller.

 

[Deleted member 4366]

Ok I have tried three different Tongxin controllers with the Goldant motor and they vary from barley working with throttle only, to working but very rough/stuttering/clacking and not going to full speed.

I am uncertain how to proceed. The choice I see here is a Lyen, Ecrazyman and/or speedict.

I think I will contact Ecrazyman first. I assume I tell him what I need is one for a no halls/sensorless motor set to 36v, 12 amps max ? Do I mention about throttle settings ? will the throttle on this one be just as rough ?

Should I give him more details like cutout voltage. Cruise control would be nice

Sorry I hope I have not hijacked the thread

Regards

Jerry

It sounds like the controllers are not giving the correct timing. Some controllers seem to be better than others. Most of my motors are sensored, so I can't really advise which are best. One time I had fierce stuttering/clacking from my Q100, which was caused by a faulty phase wire connection (bullet connector had not enough tension), so it might be worth checking yours.
The Speedict can help if your throttle is too fierce, but it can't help with timing issues.

 

[jerrysimon]

Dave happens on both motors so I doubt its a wiring fault.

Looking at the speedict it seems you have to buy different options including wiring to interrupt the throttle signal if you want to control it.

NRG and Amigafan I have emailed both lyen and ecrazyman with details of my motor and the issues so will see what they come back with.

For example setting 12 amps on my controller actually sends 17 amps to the motor. I have to set the controller to 7 amps to get t to actually send 12 amps to the motor.

So how do you know what current it sends to the motor, I assume you monitor it when you are actually riding to see peaks ?

Jerry

 

[amigafan2003]

So how do you know what current it sends to the motor, I assume you monitor it when you are actually riding to see peaks ?

Yup - I use HobbyKing R/C Hobby Store : Turnigy 130A Watt Meter and Power Analyzer

 

[jerrysimon]

Yes that is what I use though I only used it initially when I first set up the system.

I also have a 15amp fuse in the circuit. Even with my existing Tongxins I can get 17amp spikes but they are probably for ms only.

Regards

Jerry

 

[NRG]

Dave happens on both motors so I doubt its a wiring fault.

Looking at the speedict it seems you have to buy different options including wiring to interrupt the throttle signal if you want to control it.

NRG and Amigafan I have emailed both lyen and ecrazyman with details of my motor and the issues so will see what they come back with.



So how do you know what current it sends to the motor, I assume you monitor it when you are actually riding to see peaks ?

Jerry

Jerry, you look at the battery current, current sense via the shunt is not very accurate, these controllers can be up to 5amps over any programmed setting. See how adding more solder to the shunt allows a higher battery draw...its a bit hit or miss. Maybe this is one area the Lyen controllers have a benefit IE: I would hope for the cost the shunt is accurately calibrated....but I doubt it...

The battery current setting is there to protect the battery, it does not reflect the current the motor sees...this is dependent on the programable phase setting which is a multiple of battery current (IE: 2 to 2.5 times the battery draw)...so if battery draw is a little high you can reduce the amount of solder or scale back the phase current to compensate.

I would recommend you get a e-crazyman controller plus programming lead and play for yourself...even if its not the right choice it will give you a good insight into how these controllers work.

 

[jerrysimon]

Thanks for the detail NRG. I have emailed them both with my requirements and will see what quotes they come back with.

I have always struggled with understanding some of this stuff and as you say this will give me a chance to have a play.

I am also interested in having a play with the speedict and may try one of those too.

I am also surprised the Tongxin controllers are not such good quality throttle wise. I have been running the same Tongxin controller on my Brompton Tongxin/Nano and it has performed faultlessly for nearly three years, so they are reliable if nothing else.

Regards

Jerry

 

[amigafan2003]

Thanks for the detail NRG. I have emailed them both with my requirements and will see what quotes they come back with.

I have always struggled with understanding some of this stuff and as you say this will give me a chance to have a play.

I am also interested in having a play with the speedict and may try one of those too.

I am also surprised the Tongxin controllers are not such good quality throttle wise. I have been running the same Tongxin controller on my Brompton Tongxin/Nano and it has performed faultlessly for nearly three years, so they are reliable if nothing else.

Regards

Jerry

They are reasonable quality, just not on the throttle circuit side as the motors were always designed for pedelec.

 

[jerrysimon]

Well as Ed got back to me with all the details about his Lyen controller. I have gone with his offering over ecrazyman. Seems like a really helpful chap. This is probably my favoured option as well given that it is suppose to work well with throttle only on the Goldant motor, looking at you amigaman

I have gone for about every option there is i.e. throttle, PAS, cruise control, three speed selector, mainly because I have always wanted to be able to try them all out. I am pretty certain throttle control is my favourite/preferred system, but I want to have a play with all the options mixing and matching as I please. Will keep me busy in the colder winter nights

Thanks for the advice guys both on and off the forum.

PS sorry for any hijacking of the thread though it is all Goldant motor related

Regards

Jerry

 

[amigafan2003]

Hi Jerry - use this software to program:- Endless-sphere.com • View topic - XPD: open-source keywin e-bike lab replacement

If you need any help please don't hesitate to contact me

 

[jerrysimon]

My Lyen controller turned up today, lots of wires coming out of it

Jerry

 

[piotrmacheta]

Jerry, do you have a link to the Lyen controller you got? I haven't sorted my Goldant motors yet (wheels being built) but will defo need throttle control so would like to do same as you if it works OK. Thanks, Peter.

 

[jerrysimon]

I just emailed Ed Lyen and told him what I wanted. He came back with the various options and prices.

Email at the bottome of this page

LYEN Controllers

I got all the options i.e. PAS, Throttle, Three Way Power switch, Cruise Control etc as I have always wanted to play around with the different options. If these work well with the Goldant I will probably just get another couple with my favourite options.

I plan to plug it in tonight and check that the throttle works smootly. If so does any one want to buy a Goldant controller as I have three sigh...

Regards

Jerry

 

[jerrysimon]

Just tried it and as amigaman states lovely smooth throttle with the Goldant motor

I have to say this is very pleasing as having pedelec only is not to my liking.

I need to start a new thread about this controller though I guess I could just go checkout endlessphere.

Regards

Jerry

 

[amigafan2003]

Yay Glad it worked out.