Crystalyte digital controller speed limited without the 3 speeds switch

This time I am showing you something wierd about the oem max speed limit preset of the 48V 35A digital crystalyte controller.

The setup is:

- 48V 15Ah LiFePO4 V3.0Ping battery
- 9 x 7 RH205 nine continent hub motor on a 26" wheel
- 48V 35A digital controller with 12x IRFB4310 mosfet
- 3 position L H M speed limit switch ( it control the throttle limit)


Without the switch, the max speed at full throttle acheivable is 42.2kmh then when I connect the switch, if it is set to H position, the speed remain teh same.. BUT when i pout it to M position, the speed limit increase!! and goes to 50+ km/h

I guess it's depending of some resistor setting that set the throttle limit by the uC chip that control the pwm of the controller.

BUT WHY the stock max throttle is limited WHEN NOT USING THE 3 speed optional SWITCH !!

Category:

Entertainment

Tags:

• Crystalyte controller
• speed switch
• ebike
• electric bike

[Doctorbass]

i'm 100% sure that switch manage the max throttle limit period! There is NO current managing with this switch!

I tested on the 12 mosfet and also on a 18 mosfet controller and it's the same!!!

Two different controller... so i'm 100% sure they are not deffective.. they still work fine. If you program them wit the USB to serial adaptor you can set new value for Speed limit 1 2 or 3 controlled by the switch.

[vfiets]

The 3-speed switch is for managing the Amp's. Maybe a lower amp (Medium) from your controller will result in a higher unloaded topspeed of the wheel?

[Doctorbass]

The 3 position LHM switch is not for managing amp.. it's for seting 3 different speed limit thru the throttle.

i'm 100% sure. otherwise if it would be about current limit, the no load speed of the wheel would not change whatever the switch position.

Doc

[MaxSachs]

I'm buying a digital sensorless Crystalyte from some dude in Belgium, it's 48V 15A max for a BMC 400watt motor I have. I'll be sure to get the 3-speed switch to pull more RPM out of it, thanks for posting Doc.

[MaxSachs]

Good grief your cameraman is making me dizzy!

[dafoios1]

This to which it is due?? Tene that to deliver all the power in position H? And not in M medium

[ahkao86]

it allows higher throttle imput. my bike without the switch only goes 20km/h. with the switch, i can get up to 45km/h. 60v14AH 500w bike

[worldsofuncertainty]

Sorry, Crystalyte controller doesn't use the same microprocessor, but it still uses a very similar Parameter Designer to the Infineon controllers.

[worldsofuncertainty]

I could be wrong, but apparently the Crystalyte digital controllers use the same XC846 microprocessor, software, and parameter designer as the Infineon controllers do. This means there are 3 pads on the pcb that your 3 pos speed switch is connected to. By pulling any of these pads to gnd 1 at a time, it sets up a new variable in the software dictating % of the max spd. These variables are setup using param designer. 1 of these is 120% over spd.

See: touzet.eu/divers/Infineon%20do­c.doc

[emilmatejka1]

Two possibilities:

1.) The controller is set to max on the M position and 42km/h by default.

2.) The volt/current characteristics of the controller output for position M are capable of achieving higher freewheel speeds. If you try the max speed while riding the bike and it's still faster in M than in H, then the first answer is correct. If in real world H > M, then number 2 is correct.

Let us know!

[0FXproductions0]

No freakin idea

[Zeropointbug]

a thought is that maybe it's boosting the voltage to the motor? You know like buck/boost circuits work, well maybe the controller has a boost circuit inside? It would draw more current on the battery side however.