reuse cheap controller?

[qeeeme]

I bought in germany a cheap pedelec 500 euros poor quality and chinese motor. Sometimes the motor stopped alone without „reason“ and then after a while functionning again (too hot? Too much for him 25 km long with me putting the throttle at maximum?). The company had a service and they gave me a new battery and controller but it didnt help. I gave the pedelec back.
Now i have a 36 v led battery + controller. A cheap way would be to buy the motor and to put all this in a bike. But i like to be able to control such a motor i mean to measure the motor temperature, voltage, current and know all about torque , speed etc to be able to manage it well and understand the limits and what happens .
The controller looks like a box 10 x 5 x 2,5 cm approximatively and cables:
- 3 big –motor
- 5 small – motor
- 2 big – battery
- 6 small – throttle (?)
- 3 x 3 small – 2brakes + hall sensor
on the controller it is written:

typical voltage: 36 V, maximal current 14 A,
typical current 7 A under voltage 31,5 v (what does it mean?for 7 or14A?)
speed singal input volatage 1,2 – 4,4 V(chinese english, not mine!)
brake input : electron : high , low x
machine: on, close

1.i can try to buy a suzhou bafang motor like the one on the bike. do you know it in uk? or in some uk pedelecs?
1. Do you think i can use this controller on other motors? which ones?
2. Where can i buy a cheap motor?

3. and what about the motors that some people take from cars (ventilations?) or trucks etc and put them on bikes?

danke
qeme

 

[flecc]

That controller is for a Hall effect motor, but only a low powered one. The Suzhou Bafang motors that are used on some eZee and Wisper bikes need controllers able to handle currents in excess of 20 Amps.

The three large wires are the motor's phase winding wires, the five thin ones are the Hall sensor connectors, but sorting out which is which for any other motor will be very difficult, given all the possible combinations. Since you'd need to find a suitably low powered motor which might be no better than the one with the bike you bought, much better to start afresh with either a new bike or motor kit complete and scrap that controller.
.

 

[qeeeme]

That controller is for a Hall effect motor, but only a low powered one. The Suzhou Bafang motors that are used on some eZee and Wisper bikes need controllers able to handle currents in excess of 20 Amps.

The three large wires are the motor's phase winding wires, the five thin ones are the Hall sensor connectors, but sorting out which is which for any other motor will be very difficult, given all the possible combinations. Since you'd need to find a suitably low powered motor which might be no better than the one with the bike you bought, much better to start afresh with either a new bike or motor kit complete and scrap that controller.
.

am iright with the rest of the connections?
- 3 large wires – for motor inside wiring?
- 5 thin – for hall sensor?
- 2 big – battery?
- 6 small – throttle (?)
- 3 x 3 thin – 2brakes + hall sensor (wrong?)

if the 5 thin are for the hall sensor why are they 3 time 3 thin? 2 for the brakes and then?


you deduce that it is a low powered motor because it is written on the controller maximal current 14 A, ?

 

[flecc]

The Hall motor that's needed for this type of controller has eight wires from the spindle.

The 3 thick ones deliver the current from the controller into the motor windings. They must be correctly connected, and there are no colour coding standards.

The 5 thin ones carry continuous signals from the motor to the controller informing it of the position of the rotor at all times. From this the controller knows when to send the pulses of current to each winding at the correct time. That is why their connections have to exactly right, and again there are no colour coding standards.

I cannot say exactly which of the rest of the wires does what, but there will be three thin wires for the Hall effect throttle, and the two big ones are probably the battery connections.

The rest will be for brake cut-outs, pedelec sensor (probably a Hall type needing two wires), and possibly other uses.

Yes, the 14 amps maximum indicates a fairly low power motor.

That's as much as anyone can say without a knowledge of that specific controller and the manufacturers specification and colour codes.
.