Crystalyte digital controller speed limited without the 3 speeds switch

[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]

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

[worldsofuncertainty]

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

[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.

[iakazul]

A default setting in the controllers may be set for that value. If you can preset such speeds through a usb connection, a default setting (in terms of logic- if switch not connected-max speed 52.2kph) must be present. Do you have a schematic or logic chart for the controller?

[Doctorbass]

costco

[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]

Ok then you must be right. The same switch does work as a current level switch when used with the smaller "journey" analog controllers when used with a PAS.

I wouldn't know your answer with this digital controller at this moment. Good luck with finding out.

[karmabike1911]

nice find doc ill be buying or making one :)

[ahset]

that's a nice rack, where did u get it?

[circuitdotlt]

If my eyes see it correctly, it's an AXIOM rack. Check their website.

[kissmyhho]

may be it is a faulty unit. thy may have wired this one wrong.check another. good work doc!

[BungaEBiker]

Humm that's peculiar. You would think if the switch wasn't there it would be full power. Very odd indeed.

[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?

[vfiets]

By the way: Excellent work you are a guru!

[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

[luc59457]

I wouldn't think it would be about current either... Maybe it sends a bit of extra voltage when you change the switch and your meter does not read it?... Check if the torque stays the same when flipping the switch... When you put more amps, you should get more torque.