Problem with controller or motor video attached

[orcuntuna]

Hello guys, I bought controllers from Alibaba. Manufacturer added reverse function, I made all the connections but when motor starts turning and when I cut the power and start again it tries to go reverse direction(it cant go reverse since this is a geared hub).Do any of you experienced this kind of problem? I changed phase wires, hall wires tried all the combinations but no luck.
One other thing I am using a potentiometer connected to throttle pins, ordered the throttle and will come in 2 days.

 

[neptronix]

Would be helpful to know the make of controller.

Are you running sensorless or sensored mode?

 

[orcuntuna]

Hello guys, I bought controllers from Alibaba. Manufacturer added reverse function, I made all the connections but when motor starts turning and when I cut the power and start again it tries to go reverse direction(it cant go reverse since this is a geared hub).Do any of you experienced this kind of problem? I changed phase wires, hall wires tried all the combinations but no luck.
One other thing I am using a potentiometer connected to throttle pins, ordered the throttle and will come in 2 days.

Would be helpful to know the make of controller.

Are you running sensorless or sensored mode?

Hall sensors are plugged wrt colours, motor is MXUS GDR19. When halls are unplugged it doesnt turn.
Link for the controller:Chun 48-72v 45a Kare Dalga Denetleyicisi Ile 52v72v 2000w Elektrikli Bisiklet Hub Motor Kitleri Için Döngüsü Konektörü - Buy Yf 48-72v 45a Square Wave Controller With Cycle Connector For 52v72v 2000w Electric Bike Hub Motor Kits Product on Alibaba.com

 

[amberwolf]

As a test, ensure the forward/reverse wire is either grounded, or connected to 5v. If it's floating, and they didn't put a pullup or pulldown resistor on the signal line inside the controler, it could "randomly" toggle directions.

If it still always changes directions after every power cycle, there's probably smething wrong with the controller itself, either in hardware or software.


There is one other strong possibility: it might actually be intended to brake (which may cause reverse motor operation in an unloaded condition like the geared motor would have), when throttle drops below 0.8v. A few controllers are designed to do this for use with things like ebikes.ca's Cycle Analyst, which deliberately drives throttle below that to cause braking, and above that to drive the motor forward.

If this controller has active braking, rather than just regen, it could cause the motor to spin in reverse when it is not loaded.


Or if the controller has faulty fault-logic, and it detects any out of range throttle signal (below or above it's required voltage range), it might cause incorrect motor operation.

 

[orcuntuna]

As a test, ensure the forward/reverse wire is either grounded, or connected to 5v. If it's floating, and they didn't put a pullup or pulldown resistor on the signal line inside the controler, it could "randomly" toggle directions.

If it still always changes directions after every power cycle, there's probably smething wrong with the controller itself, either in hardware or software.


There is one other strong possibility: it might actually be intended to brake (which may cause reverse motor operation in an unloaded condition like the geared motor would have), when throttle drops below 0.8v. A few controllers are designed to do this for use with things like ebikes.ca's Cycle Analyst, which deliberately drives throttle below that to cause braking, and above that to drive the motor forward.

If this controller has active braking, rather than just regen, it could cause the motor to spin in reverse when it is not loaded.


Or if the controller has faulty fault-logic, and it detects any out of range throttle signal (below or above it's required voltage range), it might cause incorrect motor operation.

Thank you very nice suggestions, I will check the output voltage of a green wire on the throttle with no gas applied and in other cases. One other think I saw was when I turned the voltage supply it sinks max current gets very fast and then it gets into a stable mode sinking just under 1A I think this can be some self learn test. There is no Self learn pins on the controller but I will check these also.

 

[E-HP]

Hello guys, I bought controllers from Alibaba. Manufacturer added reverse function, I made all the connections but when motor starts turning and when I cut the power and start again it tries to go reverse direction(it cant go reverse since this is a geared hub).Do any of you experienced this kind of problem? I changed phase wires, hall wires tried all the combinations but no luck.
One other thing I am using a potentiometer connected to throttle pins, ordered the throttle and will come in 2 days.

The diagram could be mislabeled; the white jumper on a lot of controllers is a self learning function. That function reverses the motor each time the throttle is applied, and once it runs in the correct direction, you power down the controller, and disconnect the jumper before powering back up.
Can you post a pic of the label? Does it say “DC MOTO CONTROLLERBYLITHIUMBATTERY”? The link didn’t work for me.

 

[amberwolf]

Thank you very nice suggestions, I will check the output voltage of a green wire on the throttle with no gas applied and in other cases.

If you are using a pot, it will be at 0v when completely off, and 5v when compltely on. So there is no need to check the voltages, we already know what they are.

A hall throttle does not do that, typically it only goes down to around 0.8 to 1.5v or so, when completely off, and only goes to around 3v to 4v when completely on.

This is what most contorllers are designed to expect, and anything outside that range should be ignored, or cause an error condition that prevents motor operation.

A very very few controllers respond in alternate ways, such as I previously described.


To find out if this is happening, you would need to limit the throttle voltage to the expected range (tyipcally 1v lowest to 4v highest) (by watching a multimeter on the throttle signal while turning it, and ensuring it never goes outside that range), and if the behavior stops, then you'll know that when you get your regular throttle the system should work as expected.

If the bhavior doesn't change, then it is unlikely to have anything to do with the throttle voltage ranges.

One other think I saw was when I turned the voltage supply it sinks max current gets very fast and then it gets into a stable mode sinking just under 1A I think this can be some self learn test.

If hte motor is turning, with no load on it, that is normal, regardless of how it is being commanded to turn.

 

[orcuntuna]

If you are using a pot, it will be at 0v when completely off, and 5v when compltely on. So there is no need to check the voltages, we already know what they are.

A hall throttle does not do that, typically it only goes down to around 0.8 to 1.5v or so, when completely off, and only goes to around 3v to 4v when completely on.

This is what most contorllers are designed to expect, and anything outside that range should be ignored, or cause an error condition that prevents motor operation.

A very very few controllers respond in alternate ways, such as I previously described.


To find out if this is happening, you would need to limit the throttle voltage to the expected range (tyipcally 1v lowest to 4v highest) (by watching a multimeter on the throttle signal while turning it, and ensuring it never goes outside that range), and if the behavior stops, then you'll know that when you get your regular throttle the system should work as expected.

If the bhavior doesn't change, then it is unlikely to have anything to do with the throttle voltage ranges.




If hte motor is turning, with no load on it, that is normal, regardless of how it is being commanded to turn.

Today I tried with a throttle I ordered and it worked perfect. First I did self learn than unplugged learn pins and everything is nice. Using potentiometer is a little problematic since it is hard to adjust between required voltage levels. Thank you for your help