Tag Archives: electric-bike-motor - Page 5

How to disconnect the bldc hub motor for electric bike?

Posted by on January 1, 2022 Comments Off on How to disconnect the bldc hub motor for electric bike?

Spring come,nice days to ride e-bikes.But when you take out of your old e-bike from warehouse and are going to ride it.Suddenly you would find there is strange noise from hub motor .
These days the electric bike motor are brushless gearless and used for electric bike widely.It was made of rotor-winding,magnet,hub,covers,axis,bearings…
If this bike motor has strange noise,generally it’s from rotor-winding rub magnet or the bearing is broken.It’s easy to solve it.The important is to disconnect this electric hub motor.
You should prepare some tools:
1.Hexagon wrench (Necessary)
2.Hammer (Necessary)
3.Screwdriver

Disconnect hub motor Step 1:
Take off nuts and gasket on axis and use hexagon wrench to loose 16 screws.

Step 2:
Make the hub motor stand and cable is bent inside.Left hand hold the hub motor and use hammer to knock the axis.

Step 3:
After some knock,the cover will take off hub.

Step 4:
Use the same way to knock the other axis,the other cover will also take off hub.

Step 5:
When both side covers are off hub,next we should take out the rotor-winding.Make the axis stands on the ground,both hands press hub motor,the rotor-winding will out of hub.

Step 6:
Check magnet around inside hub,if there is some metallic impurities stick on magnet.Please remove it.If no,but found some friction trace on magnet.Please check around the rotor-winding and remove some glue around the steel.If not,please check the bearing inside the cover.Use a little finger hold inside the bearing,use the other hand to turn cover,faster,better.If you hear some noise.Please replace bearings.

By now,you have solved problem.

26 inch electric hub motor kit for the dropout 160mm fork

Posted by on December 30, 2021 Comments Off on 26 inch electric hub motor kit for the dropout 160mm fork

Q: Are you able to supply a rear hub motor kit wheel (36v @ 500W – 750w) for a rear dropout of 160mm?
I have an existing e-bike that uses a 250w geared rear hub drive on a 26 x 1.95 wheel.
It has a 7 speed gear, standard 160mm disk brake and a bike mount (frame) width of 160mm.
I would be happy to go from a geared (small hub) to the larger electric bike motor kit type.
The existing bike frame is steel (not carbon or an alloy) so I may be able to ‘bend’ the rear forks… (fit).
I have included a PDF diagram (attached) to show the existing rear hub motor fitting size.

A: Yes, we have dropout of 160mm 36V 750W electric bike motor.

Q: With the new Leaf controller and LCD, I know I can limit the maximum output speed of the 750w Direct Drive hub motor to a set (safe) maximum speed for each PAS mode 1 – 5.
With our Australian laws, I want to honor speed and safety – yet have a safe speed and torque (reserved) for hills.
I respect that you have kindly supplied my order with a 320RPM hub motor ( a good choice).
My question is: “Does the max speed by set by LCD / Controller economically limit the maximum current sent to the hub motor”?
I am talking here about battery life with a low speed LCD / Controller setting ‘modulating’ the full power sent to the hub motor.
So if I program the setting to say 25Km/h, then is the torque output effected at speeds less than the given 25Km/h?

A: Yes, if you set max 25kmh by LCD, motor will work less than 25kmh.(You can set max 10kmh,11kmh,12kmh….48kmh,49kmh,50kmh)

1.Press “SW” from LCD. Turn on LCD
2.Press “up” &”down” together for more than 2 seconds in 3 seconds after LCD display – Then “72” will flash.
3.Press “down” or “up” to set any max speed. Press “SW” one time to save. Then “26” will flash. It’s tire size. Don’t set. Still press “SW” one time to save. Then “kmh / mph” will flash. Don’t set. Press “SW” one time to save.
4.At last, press “SW” more than 2 seconds, then will be back.

There is a Three button switch inside parcel.

** Black switch (be Left side / Middle – motor works forward. Be right side, motor works backward/reverse)
** Red switch (Be left side / regen off. Be right side / regen on)
** Green switch ( When motor is working, press this green switch one time. LCD is display C, motor will work as the same speed) – Re-press this green switch one time, or press brake lever, turn throttle to max, motor will stop.

measure electric bike hub motor hall sensors

Posted by on December 30, 2021 Comments Off on measure electric bike hub motor hall sensors

Bike motor controller is fine, they all got 4.9~5.0 from meter reading. We will open and check the hub motor after work. We are more worried about if the electric bike motor itself is damaged.

Could you get the below data:
1. Remove this white biggest plug, power on and measure volt of white biggest from brushless motor controller.
Red, Black, blue, green and yellow
1.Red and black is about 4.9V
2.Blue and black is about 4.9V
3.Green and black is about 4.9V
4.Yellow and black is about 4.9V

If you can get the data, the bldc motor controller is okay.

LCD always display “05 flashing”.
The issue comes from electric bike motor hall.(five wire: red, black, green, blue and yellow)
Could you check this five wires whether through?

This is a instruction about how to disconnect this hub motor.
It takes about 10 minutes to disconnect.

You will find a PCB around the rotor-winding. There are five wires (red, black, green, blue and yellow) are on this PCB.

I removed both panel on hub motor and did a quick test. All the thin wire looks fine. They can go through from both side. But the thick wire connect to enameled wire that I can’t test since they been wrapped up.

If Not flashing. Then it will work.
Could you get below data from electric bike motor hall sensor?

Three are three hall sensors around rotor winding.
For example:
hall 1 Green (pin 1.1 pin 1.2 pin 1.3)
hall 2 Yellow (pin 2.1 pin 2.2 pin 2.3)
hall 3 Blue (pin 3.1 pin 3.2 pin 3.3)

Pin 1.1 ,pin 2.1 and pin 3.1 are connected to the red wire together.
Pin 2.1 ,pin 2.2 and pin 2.3 are connected to the black wire together.
Pin 1.3 is green,pin 2.3 is yellow,pin 3.3 is blue.

Volt meter Red Pin to Pin x.1 black Pin to x.2 (x=1,2,3)You will get below data:
Pin 1.1 and pin 1.2 is about 1.185 (see picture 5)
Pin 2.1 and pin 2.2 is about 1.185
Pin 3.1 and pin 3.2 is about 1.185

Volt meter Red Pin to Pin x.1 black Pin to x.3 (x=1,2,3)You will get below data:
Pin 1.1 and pin 1.3 is about 1.498 (see picture 4)
Pin 2.1 and pin 2.3 is about 1.498
Pin 3.1 and pin 3.3 is about 1.498

Volt meter Red Pin to Pin x.2 black Pin to x.3 (x=1,2,3)You will get below data:
Pin 1.2 and pin 1.3 is about .633 (see picture 6)
Pin 2.2 and pin 2.3 is about .633
Pin 3.2 and pin 3.3 is about .633

Another way to test hall sensor:
Connect all wires, power on.

Measure red, black, green, blue and yellow BLDC motor hall wires
1.Red and black is about 4.9V
2.Black and yellow is about 4.9 or 0V (Please use your hand to turn hub motor, the data will change from 4.9-0V)
3.Black and blue is about 4.9 or 0V (Please use your hand to turn hub motor, the data will change from 4.9-0V)
4.Black and green is about 0V or 4.9V (Please use your hand to turn hub motor, the data will change from 0V-4.9V)

If nothing is changed, this hall was broken.
How about the other black and red wire?
Only black or red wire can’t touch well or not go through, 05 will be always flashing.