different brake options and wiring

[Sparfuchs]

Hello EV friends,
i'm a bit confused about the different brake options on a sabvoton 72150 and how to use them.
If i see it right, there are three different options ? Low brake, high brake 12v and brake throttle, right ?
but why does low and high brake only have one wire and how do i connect a switch ? btw.. i've got a 12v/10A converter.
And whats the thing with the brake throttle ? Could i just connect it to a thumb throttle and use it as a variable brake or is there something like a brake lever throttle to buy ?
What would you guys recommend to use to brake with a mxus 3k turbo ?
Thanks for your help.

Sparfuchs, Vienna

 

[xfrankie]

Hello, if I remember correctly, the difference is this:

1) BrakeLow - connect to 0 Volt (battery negative) to engage. This does not produce braking from the motor, only disconnects the power (stops further acceleration)

2)BrakeHigh - connect to +12 Volt (or Battery positive? Not sure) to engage. This applies !FULL! regen power specified in controller settings. This might trip the BMS protections if the regen is set too high.

3) brake throttle - connect to second throttle (thumb or twist or whatever), this then modulates the regen power up to the maximum specified in controller settings. This option must be set when controller is connected to a PC - the phone app does not have the option to select throttle as regen input...

The throttle is by far the best option for braking IMO because you stay in control of how fast you want to slow down. From a mild braking to keep downhill speed in check, to an "oh-shit!" situation whenever it is needed.

But from experience, i would not recommend mxus 3k to be powered with sabvoton 72150 , as the controller is MUCH more capable than the motor. This leads either to fast motor overheating, or you have two thirds of controller's power not utilised to prevent said overheating... Sure you can get to 110kmph, but you also reach 100 Celsius within two minutes...

 

[Sparfuchs]

Hello, if I remember correctly, the difference is this:

1) BrakeLow - connect to 0 Volt (battery negative) to engage. This does not produce braking from the motor, only disconnects the power (stops further acceleration)

2)BrakeHigh - connect to +12 Volt (or Battery positive? Not sure) to engage. This applies !FULL! regen power specified in controller settings. This might trip the BMS protections if the regen is set too high.

3) brake throttle - connect to second throttle (thumb or twist or whatever), this then modulates the regen power up to the maximum specified in controller settings. This option must be set when controller is connected to a PC - the phone app does not have the option to select throttle as regen input...

The throttle is by far the best option for braking IMO because you stay in control of how fast you want to slow down. From a mild braking to keep downhill speed in check, to an "oh-shit!" situation whenever it is needed.

But from experience, i would not recommend mxus 3k to be powered with sabvoton 72150 , as the controller is MUCH more capable than the motor. This leads either to fast motor overheating, or you have two thirds of controller's power not utilised to prevent said overheating... Sure you can get to 110kmph, but you also reach 100 Celsius within two minutes...

thanks a lot for your reply xfrankie,
all right, so low brake to negative also known as ground/GND i guess ? and high brake to positive output of my 12v converter. But i could also use a second throttle without using low or high brake to brake variable ? And the regenerative braking can be used with high brake or with throttle brake right ?
Does someone know how strong high brake brakes ? In the description of the sabvoton controller it says it has ABS. How do i use that or how does it work ?
Any idea were i can find a brake lever throttle ?

 

[amberwolf]

Strength of braking probably depends on settings; you could look in the various Sabvoton threads and see what others have posted about that.

You can do this to make a variable brake lever:

https://endless-sphere.com/forums/viewtopic.php?f=2&t=105460

 

[xfrankie]

thanks a lot for your reply xfrankie,
all right, so low brake to negative also known as ground/GND i guess ?

Yes, that is correct.

and high brake to positive output of my 12v converter.

quote from the seller's site: http://www.cnqsmotor.com/en/article_read/Sabvoton%20SVMC/SSC%20Series%20Brushless%20Sinusoidal%20Programable%20Motor%20Controller/537.html

"2.1. H-brake： If the purple wire connect to 12V，the controller enter brake status， when it disconnect with 12V，the controller quit the brake status.
2.2. L- brake: If the Yellow wire connect to 0V(Battery negtive)，the motor stop running.
High brake wire connect with 12v brake wire of hand brake/foot brake; low brake wire connect with ground wire.
High brake and low brake cannot using in the same time."

so yes,
HIGH-brake wire connects to +12Volt to apply braking force (engage regen)
LOW-brake connects to 0 Volt (GND) to only make the motor coast (no braking force, no acceleration force)

But i could also use a second throttle without using low or high brake to brake variable ? And the regenerative braking can be used with high brake or with throttle brake right ?
Does someone know how strong high brake brakes ? In the description of the sabvoton controller it says it has ABS. How do i use that or how does it work ?
Any idea were i can find a brake lever throttle ?

The variable brake and "switch" brake (high or low) are mutually exclusive. The controller settings only allow for one or the other. Not both at the same time.

E-brake throttle = variable input
E-brake switch = on/off full braking force

EDIT: the above mentioned option is missing from the android app, you can only set this via PC software. END EDIT

In the settings you can set the PhaseAmps (motor amps) to directly controll regen strength and thus braking force. But you only set the max value, so it is best to then regulate the force via the variable brake throttle. Or any other variable input which you find convenient, eg. Amberwolf's DYI variable lever.
I dont think you need maximum possible braking force every single time you touch the brakes
The brakes are as strong as you set them to be, but the force diminishes with speed. At near-stop the Ebrakes stop working at all, so full-stop is only possible with conventional brakes. But at high-ish speed, 3000-5000w braking force is no problem to achieve (if your battery can take it).

 

[Sparfuchs]

Strength of braking probably depends on settings; you could look in the various Sabvoton threads and see what others have posted about that.

You can do this to make a variable brake lever:

https://endless-sphere.com/forums/viewtopic.php?f=2&t=105460

Thanks a lot for your reply amberwolf,
i think for now, i'll just use a thumb throttle so i can keep my hydraulic brakes for none electric use

 

[Sparfuchs]

thanks a lot for your reply xfrankie,
all right, so low brake to negative also known as ground/GND i guess ?

Yes, that is correct.

and high brake to positive output of my 12v converter.

quote from the seller's site: http://www.cnqsmotor.com/en/article_read/Sabvoton%20SVMC/SSC%20Series%20Brushless%20Sinusoidal%20Programable%20Motor%20Controller/537.html

"2.1. H-brake： If the purple wire connect to 12V，the controller enter brake status， when it disconnect with 12V，the controller quit the brake status.
2.2. L- brake: If the Yellow wire connect to 0V(Battery negtive)，the motor stop running.
High brake wire connect with 12v brake wire of hand brake/foot brake; low brake wire connect with ground wire.
High brake and low brake cannot using in the same time."

so yes,
HIGH-brake wire connects to +12Volt to apply braking force (engage regen)
LOW-brake connects to 0 Volt (GND) to only make the motor coast (no braking force, no acceleration force)

But i could also use a second throttle without using low or high brake to brake variable ? And the regenerative braking can be used with high brake or with throttle brake right ?
Does someone know how strong high brake brakes ? In the description of the sabvoton controller it says it has ABS. How do i use that or how does it work ?
Any idea were i can find a brake lever throttle ?

The variable brake and "switch" brake (high or low) are mutually exclusive. The controller settings only allow for one or the other. Not both at the same time.

E-brake throttle = variable input
E-brake switch = on/off full braking force

EDIT: the above mentioned option is missing from the android app, you can only set this via PC software. END EDIT

In the settings you can set the PhaseAmps (motor amps) to directly controll regen strength and thus braking force. But you only set the max value, so it is best to then regulate the force via the variable brake throttle. Or any other variable input which you find convenient, eg. Amberwolf's DYI variable lever.
I dont think you need maximum possible braking force every single time you touch the brakes
The brakes are as strong as you set them to be, but the force diminishes with speed. At near-stop the Ebrakes stop working at all, so full-stop is only possible with conventional brakes. But at high-ish speed, 3000-5000w braking force is no problem to achieve (if your battery can take it).

Thanks a lot, now i know everything i needed