Tag Archives: hub motor - Page 14

Leaf hub motor bike kit is working

Posted by on May 31, 2020 Comments Off on Leaf hub motor bike kit is working

Q: The bike conversion kit system is now working.
Still have some questions. It is about the brakes.
If we take the red and black wires from the scooter brakes and connect in parallel to the connection of the new hub motor controller, will this have a negative effect on the controllers? My friend thinks that this should not be a problem since this only brakes a circuit.

A: About that brake has two types.ONE is high voltage to brake.The other is low voltage to brake.
Ours is low voltage to brake,you should check your old hub motor controller whether that is low voltage to brake.
If you have volt-meter,you could get about 5V from red and black wires from your old hub motor controller.If it’s 5V. That’s no problem.

Q: We finally got the chance to try the new bike conversion kit wheel after doing all the modifications except for the front brake which we still have to modify.

We have a new problem and I need your expertise. I tested the bike conversion kit wheel up the hill and on its own (without using the rear wheel motor). It went up the hill at about 17 km/hr……..which I think it is satisfactory.

However when I took it up a steeper but very short incline which is on my way home, the fuse connected to the batteries got blown and lost power (no electricity).

The fuse is gauged at 10A. What should I do to avoid blowing out the fuse? If I change the fuse to a different amperage, will this have negative consequences for the rear motor? Do you suggest anything different?

As always, appreciate your assistance.

A: When up the hill,the current will reach about 15A.If too steep hill,it will reach more than 20A.
20A-30A current is easy to break controller.
Sometimes 15A continuous current for about half an hour also can break controller that’s because of too hot will break hub motor controller’s MOSFET.

We suggest:
* Cool controller is important.
* When you up hill,use two hub motors.On the flat road,use one motor.

Our hub motor bike conversion kit can’t get any problem when your up any hill.But should cool controller.

Use 15A-20A fuse.Had better to use 15A.But if use 20A fuse,climb hill has more power.But we worry controller.

How to make a hub motor for electric bike?

Posted by on May 25, 2020 Comments Off on How to make a hub motor for electric bike?

How to make a hub motor for electric bike?
Motorized hub motor can drive your e-bike.Everyone know motor controller,battery,throttle,brake lever etc other accessories.
But for motor,it seams a little mystic.Actually it’s not.
Because of hub motor doesn’t have two carbon brush inside motor,so called brushless. If have,it’s brushed hub motor.
Now we talk about brushless hub motor.
This hub motor is made of copper coil, aluminium / or steel rotor bracket,three hall sensors,

Needs below stuff：
1.1 pcs of Al motor hub and 2 pcs of Al motor covers (made by foundry)；
2.1 pcs of axis (fix on rotor);
3.2 pcs of bearings (fix on each cover);
4.magnet (distribute inside hub);
5.copper coil;
6.aluminium / or steel rotor bracket (made by foundry)；
7.three hall sensor.
8.six screw or more;
9.insulating paper;
10.A-B glue water (fix hall sensors on rotor)
11.8-pin cable (Yellow,blue and green three wires are used for motor phase A,BC…the other five wires are for hall sensor,red is supplied +5V,black to ground.Yellow,blue,green three wires are connected to separate three hall sensors.

Needs tools:
1.screw driver;
2.rubber / or wood hammer;

The important and complicated step of make a hub motor is circle coil.It’s made by machine or handwork.If magnet no change, just change the gauge of the coil wires and/or the turns number of the coils so that change hub motor ‘s power and speed.

After circle coil,then use A-B glue water to fix three hall sensors to each rabbet.Connect 8-pin cable to hall sensor and motor phase A,B,C

Install rotor inside hub,mount each cover.Use bldc motor controller to test hub motor.

20 inch 36V 250W front hub motor – electric bike conversion kit

Posted by on May 25, 2020 Comments Off on 20 inch 36V 250W front hub motor – electric bike conversion kit

Q: We are interested in leaf 20 inch 36v 250w front hub motor – electric bike kit. Item ID #LBCK2036250F
When I buy this electric bike conversion kit . I saw picture full Twist (Twist throttle No battery gauge), please can you change to half Twist? I want this Half Twist. My DAHAN will work match washer + front hub the 100mm fork and disk? See link info the DAHAN how look Hope help.

A: This bike conversion kit doesn’t need battery gauge, because LCD can display battery gauge, we can ship you a half twist throttle to replace this full twist.
If the spacing of your fork is 100mm (picture enclosed),this #LBCK2036250F can work with disk brake.

Q: We will buy this bike conversion kit later. LCD display have MPH? I see this youtube for full max speed 21.7mph which is 36V 10Ah Rack lithium ion OR 36V 8Ah bottle lithium battery?
I think will buy any online for 36V 10Ah Li-ion Water bottle Battery, will super up hall and super run road full 21.7mph?

A: This LCD display KMH, can’t display MPH now. One week later, we will have new LCD controller. This hub motor controller has more function:
 Cruise
 Reverse
 Regen brake
 Mph / kmh
 Pedal assist ( 1 – 5 )
 …

This old hub motor controller work with this 20 inch 36v 250 front hub motor wheel. Max speed:21.7mph (We test use 36v lead acid battery)
36V 10ah Rack lithium or 36V 8ah bottle lithium ion battery both can reach max 21.7mph.

We have 36V 11ah lithium-ion water bottle battery in stock, but we haven’t updated it to leaf site. The difference between them is the bottle size of 36V 11ah higher than 36V 8Ah bottle.

When you use 36V 10ah lithium-ion water bottle battery and ride it, full speed is about 18mph.(21.7mph is no load)

Sure if I would buy the 36V 8ah bottle lithium ion battery can work with 20 inch 36V 250W front hub motor max full 21.7mph and or 24 inch 36V 250W front hub motor max full 26mph? (LBCK2436250F)

My DAHAN Typhoon twin Brake right please find attach see picture, if this e-bike right brake cable can off one, or get right twin brake e-bike?

Error 4 stop hub motor working

Posted by on May 25, 2020 Comments Off on Error 4 stop hub motor working

Q: I bought a hub motor few months ago. Display error 4 is your brushless controller LCD? And I have a problem in the moment, because I install it and when I start to move the quad appears all the display the error 04 and a symbol of a tool, I had seen at the forum what’s the error meaning, but I think it’s something different because it had full charged electric bike battery pack.

A: How long did you use this electric bike battery pack ?

Q: It’s new. I have used ones for test the hub motor. It start full at the display but 100 meter later appear the error, hold on, then when appears the error, 10 minutes later in the display appear again full the electric bike battery that I use is a 4 lead batteries of 12V 45 Ah

A: Is your electric bike battery is 48V? That’s correct. The issue is battery. Do you have volt meter?

Q: Yes. I can find one.

A: Ride this bike and use volt meter to test the voltage of electric bike battery. If the voltage will drop down. The problem comes from electric bike battery. If the voltage drop down to 42V, the error will appears. If you don’t ride, the will display appear full.

Q: I’m trying to start the hub motor without any load. It works for 6 hour more or less.

A: How many current does your electric bike battery can offer? 10A , 20A or larger. You should use volt meter to measure the voltage when you load this hub motor.

Q: I bought 4 batteries of 12 V 45 Ah

A: Sometimes new electric bike battery is in stock for a long time. Even if No use. Also can need this issue. If you don’t load our hub motor, is there no error display?

Q: No, if it start to work freely, it work for 6 hours. How I use the volt meter to measure the electric bike battery? Working the hub motor ?

A: Connect red, black wires of volt meter to the positive and negative when the engine works,
watch the voltage on volt meter.

Q: Let me prove it, so I have to connect the positive of the battery to the positive of the engine and as well to the positive of the volt meter, and the same thing whit the negative ones, then star to work the quad watching the volt meter and if the voltage goes down the issue is in the battery.

A: Connect wires as before. Just add two wires from voltage meter. Red wire of voltage meter is connected to the positive of battery. The black wire is connected to the negative of battery. Make sure it on the VDC voltage position (=200VDC or ..)

Q: How volts it has to show to work properly? More than 48V ?

A: 42-60V

Q: Ok, so if the battery is full it has to show around 60V?

A: No, that depends on what type of battery. If LiMn2o4 is about 54V, LiFepo4 is about 58V. Lead acid is about 54V. When you test, the voltage will drop down. This electric bike battery is not good.

Q: I let you know if something different happen.

issue about electric bike kit battery

Posted by on May 25, 2020 Comments Off on issue about electric bike kit battery

We purchased an electric bike kit including motor controller, hub motor wheel, throttle, brake lever and with 36V 10AH bottle style Lithium Ion electric bike battery that used for testing 36V solar charger from one supplier, not from leaf motor. After charging this electric bike battery for 10 hours by better solar power, full charged, we rode the bike, but hub motor wheel only run about 8km.

We use a ampere meter in series to electric bike kit system, powered on and rode it. We got the current is about 5A. The speed is 257RPM.We use 26” hub motor wheel.

We calculate the speed is about 32Km/per hour.
See below formula:
（3.14×26”×0.0254）× 257RPM × 60 minutes ÷ 1000 (m-Km)=32km

If this is 10Ah battery, per hour lost 8ah.We can use 1.25 hours.
See below formula:
10Ah ÷ 8ah/per hour= 1.25hours

We think full charge this electric bike battery per time, the hub motor wheel can run about max 40 km. 32km/per hour × 1.25 hours = 40 km

There is definitely a problem with this electric bike battery, I’m not sure whether electric bike kit is because of the solar charging or our testing, or if it has a fault. But I need a replacement electric bike battery asap, because we don’t have any more 36v electric bike battery, and we sold 1 set of electric bike kit with lithium battery last week. I think BMS inside this electric bike battery no problem. The problem comes from the li battery cells. Maybe this electric bike battery had stayed in warehouse for a long time and haven’t charged it. It will make the electric bike battery cut down the achieve distances and use life.

So if solve this problem and let my hub motor to work asap, only replace all cells or replace new electric bike battery.

How connect electric hub motor controller wires

Posted by on May 25, 2020 Comments Off on How connect electric hub motor controller wires

Q: Now that I understand the purpose of these wires, I need to know exactly how to connect bike conversion kit wires.
1. “you could use a switch(on/off)to short pink and black”
1.1 What kind of switch? Is it included this bike kit or I have to buy it?
1.2 If I have to buy a switch, what are the characteristics of it? How do I connect pink/black wires to the switch?
1.3 If so, do I need to buy additional wires to connect pink/black to the switch? If so – what are the characteristics of it, wire resistance/diameter?
1.4 These pink/black wires are connected to a plastic connector
Do I need to buy another connector to connect my new hub motor ?

2 “use yellow and brown wires coming from the throttle to control your bike kit cruise.”
2.1 Again-how would I do that? Do I need to connect yellow/brown wires somewhere on the hub motor controller, is so – how?
2.2 Please note that these wires don’t have any kind of connector attached – am I suppose to connect them ?

3 “put the green wire to “+” and the grey to “-“, your LED on your throttle will light”
3.1 Where are the “+” and “-” you are referring to? Is it on the battery itself, or controller, or elsewhere? (for example: battery itself doesn’t seem to have open +/- sockets – other than the one used by the supplied cable)
3.2 Can I connect green/grey permanently (so that LED always shows the battery status), if so – how would I connect? Where would I connect them to exactly – controller or battery?
3.3 Again please note that green/grey wires are not attached
to any connector, just “bare” wires, so I don’t understand how can I connect them?
If you have any additional photographs and/or drawings, please share them also. If I need to buy
additional parts – please let me know what they are.

A: Don’t mistake with the positive and cathode of your bike kit battery to hub motor controller.(red and black battery wires).It doesn’t matter about making a mistake with other wires.
Don’t worry. Short any thin wires, it doesn’t burn your controller.
1.Cruise: when your motor is running, connect the pink wire to black wire(use a wire to connect pink and black wire) or you could use your brake lever to test this function. When your brake, it will cruise, when your loose your brake level, it will cancel cruise function.
2.This switch just have on/off function, you could buy other switches in your market
3.You should use a wire to connect bike conversion kit, it doesn’t matter about wire resistance / diameter, is this wire, no current.
4.You could use spare connector: yellow connect pink wire, brown connect black wire (C&Z),when your motor is running, press this red switch, your motor will cruise as the same speed.
Put the green wire to battery “+”
Put the grey wire to battery “-”
The Led will light, try it as I said, it doesn’t burn anything.
In fact, it’s very easy to do it, for example, you could use your
handle brake (two wires) to make a female connector connect any connector (white & black, pink & black)from hub motor controller.
If possible, you could use a software “e-drawing” to open our 3D about this hub motor controller.

How to build spokes on hub motor for electric bike ?

Posted by on May 24, 2020 Comments Off on How to build spokes on hub motor for electric bike ?

DIY electric bike conversion kit and convert your bike is funny. Sometimes we prefer to purchase spoke hub motor , bike rim and spokes. And build spokes on electric bike motor by ourselves.

If we want to convert 26inch front wheel, we should purchase 1 set of front spokes hub motor, 26inch rim and 36pcs of spokes. We can purchase them from leaf bike motor shop online.

Received goods and check them:
1. How many spokes you received. Generally we need 36 pcs spokes to built on hub motor and 12 gauge spokes for electric bike. 13, 14 gauge spokes are too thin, just for common bike.
2. There are 36 eyelet on bike rim and hub motor.
3. Check nipple and the dia. of eyelet on rim, make sure the nipple can put into eyelet.

Calculate the length of spoke :
If you use 205 leaf front hub motor, the eyelet to eyelet of rim is 511mm that is 26inch rim, spokes should be 155mm length.

You need below tools to install spokes on hub motor.
1.iron shelf
2.slotted screwdriver
3.nipple wrench
4.magnet
5.rubber hammer
6.tape measure
7.calipers

Done check, everything is okay. But we found the dia. of nipple is 4.5mm and the rim is also 4.5mm. These eyelets are too small. See pictures.

Get a 4.8mm electric drill. Drill 36 pcs of eyelets. Adjust the iron shelf so that the dia. is 100mm. Because standard front fork is 100mm. Then put the rim inside the iron shelf, hold on the hub motor. Make the first spoke wear into hub from left side, the next from right side. One by one from left side to right side. Done install all 36 pcs of spokes, please check them whether correct. See pictures.

If no problem, we should hold spokes on rim by nipples First hold one spoke on left side, then cross to fix another spoke on left side. Next step, cross two spokes on rights side and fix them. Left side, right side, a group of four spokes. See pictures.

Fix all spokes, we should use wrench to tight spokes a little, please don’t be too tight. Use hand to turn wheel, make sure there is no noise from friction of rim and nipple. Use rubber hammer to knock rim when the wheel is running so that the rim will be not jumping up and down. Still to tight spokes a little. See pictures.

Turn wheel, you will find the rim from left side to right side. In order to make the wheel running in the middle. We use calipers to measure and get the data. Then use a magnet to hold a pin. See pictures. If rim to the left, we tight right side spokes or loose left side spokes. See pictures.

It takes about 1 hour to build an wheel.

Electric hub motor bike conversion kit for electric bike

Posted by on May 24, 2020 Comments Off on Electric hub motor bike conversion kit for electric bike

Ride a bike everyday is good for health. It can help you lose weight and achieve healthier body. By the way,sometimes riding for a long trip or steep road that is too tired.Buy a new e-bike is too expensive.Why not place an order for bike conversion kit and convert your common bike to electric bike by yourself.

Standard bike conversion kit includes:
1.hub motor wheel (8″ 10″ 12″ 14″ 16″ 18″ 20″ 24″ 26″ 27.5″ 700c 28″ 29″ 27″)
2.motor controller(drive hub motor)
3.twist throttle or thumb throttle(default twist throttle)
4.brake lever with low voltage to brake
5.three-button switches(control horn,led lights,cruise..)
6.pas(for Europe)
7.battery with charger(optional)

1 set of bike conversion kit has three key products:hub motor,motor controller and electric bike battery.
Hub Motor:There are 8″ 10″ 12″ 14″ 16″ 18″ 20″ 24″ 26″ 27.5″ 700c 28″ 29″ 27″ hub motor,what inch would you choose depend on your common bike wheel size.Motor type:brushed hub motor or brushless hub motor also called BLDC hub motor.Now because the bldc hub motor has advantage of low noise,high efficiency that replace of brushed hub motor.
Leaf Motor has 36V 750W / 48V 1000W brushless gearless electric bike motors are popular with North America.The other 24V 250W / 36V 250W bldc geared hub motors,European prefer them.

Motor Controller:Bldc motor controller which is called a heart of bike conversion kit system.Generally 6-MOSFET controller drives 250W hub motor,9-MOSFET drives 500W,12-MOSFET drives 1000W bldc motor.
Leafmotor is selling a LCD motor controller that display speed,mileage,battery gauge.

Battery:In China,electric bikes still use lead-acid batteries,they’re much cheaper,but a little heavy.North America or Europe always use lithium batteries that are more environmental.
Leafmotor has three types of lithium batteries:high speed,frog and bottle electric bike batteries for customers to choose.We found most of issues from lithium batteries that were not used correctly.
Three are two advice about how to use lithium battery.
1.Please remove power connector. If you don’t ride your e-bike for a couple of days.
2.Charge your battery often,but please don’t overcharge it.

Received your bike conversion kit,please check packing box first,then disconnect it and check each product that make sure all goods are okay.Then prepare below tools to install bike kit.
1.open-end wrench(loose/tight screw nuts)
2.philips screwdriver(fix LCD)
3.some zip ties(fix wires)

Remove the front or rear wheel.Find out the motor’s direction of rotation.Fix this motorized hub motor wheel to your frame fork and use open-end wrench to tight both screw nuts.According as install instruction manual and wiring diagram to connect wires make sure your wheel in the air,power on your battery,test bike conversion kit system.Turn throttle,if motor works well without any noise.Then use zip ties to fix wires.If not,please re-check your wire connecting.

If everything is good,it will take about 10 minutes to done it.Just order 1 set of electric hub motor bike conversion kit,your common bike will become electric bike.Cost less,get more.Have you found some fun?

Hub motor,bldc motor,bike conversion kit supplier: Leaf Motor Technology Co.,Ltd.

Some issues about front hub motor electric bike kit system

Posted by on May 22, 2020 Comments Off on Some issues about front hub motor electric bike kit system

DIY 1 set of 26″ 36V 750W front hub motor electric bike kit from Internet shop,waited for a couple days,at last received it.
Checked packing box,it’s okay.Disconnected package,there were all goods inside box:

1.1 set of 26″ 36V 750W front hub motor wheel without tyre
2.1 set of 36V 750W bldc motor controller with LCD
3.1 set of twist throttle with battery gauge
4.1 set of brake lever with low voltage to brake
5.1 set of three-button switches(control horn,led lights,cruise..)
6.1 set of 36V 16Ah LiMn2O4 electric bike battery with 110~230AC charger
7.some zip ties(fix wires)
8.1 set of instruction manual and wiring diagram

Was told to prepare below tools to install electric bike kit:
1.open-end wrench(loose/tight screw nuts)
2.philips screwdriver(fix LCD)

By now,install electric bike kit seems very easy.But for a newer,first time to install electric bike motor (hub motor) wheel and need to connect various unknown wires that is still a little difficult.
Leafmotor will share some install experience with every DIY bike kit rider.Some issues you will meet:
1.You are going to install hub motor wheel,you should find out the motor’s direction of rotation first.Please read install instruction manual;
2.Install tyre according as flower pattern of tyre;
3.Fix 26” front hub motor wheel on front fork.If your front fork is 100mm,no problem.After installed,sometime you will find the wheel isn’t in the middle of fork,now you should use some washers to adjust.If still can’t solve it,the problem come from spoke rim should re-fit this rim;
4.Fix bldc motor controller,LCD,electric bike battery and install throttle,brake lever,three-button switches.This step is easy;
5.Make the electric bike motor wheel in the air, power on li battery and test bike kit system.If it works normal.Please use zip ties to fix wires.If not,re-check wire connecting according as wiring diagram.

This fifth step is the most important.When you power on battery,you may meet below issues:
1.The electric bike kit system can’t work.When you turn throttle,nothing is happened.Now you should check battery power connector and three-pin throttle connector;
2.The electric bike kit system works as the fastest speed suddenly.The problem is the black ground wire from throttle isn’t connected well;
3.The hub motor shake,please check motor phase wires;
4.All leds light,but electric bike kit still can’t work.Check motor wires;
5.The electric bike kit works,but just wok less than 3 seconds,all lights on throttle are off.Loose throttle,be on and the bike kit system still works less than 3 seconds.This is battery issue,use volt-meter to measure it.Full charged 36V limno4 battery is 42V and dis-charged it is 34V.The volt of your new battery can’t less than 34V.If it’s under 34V,please return it to your supplier.
6.LCD doesn’t display speed.Solve: the sensor should be closed to the detector.

Hub motor,electric bike motor,electric bike kit supplier: Leaf Motor Technology Co.,Ltd

hub motor electric conversion kit failure

Posted by on May 22, 2020 Comments Off on hub motor electric conversion kit failure

Firstly, thank you for sending the hub motor with rear light so promptly – it arrived within a couple of days of your email and is installed and works perfectly.

Unfortunately there are some problems:

1) There were no instructions that I could find for connection of the electric bike battery level wire – the green one – so I am unable to tell what the battery levels are.

2) The light switch (brown and yellow leads) did not work on either the thumb control or the twist control (I use the thumb throttle control on the bicycle). I wired the lights directly to the electric bike battery leads with a switch and this works fine.

THE BIG PROBLEM.

I received electric conversion kit and installed the hub motor,motor controller,electric bike battery and the other parts on my bicycle about 10 days ago. I ride about 30km to work and back again in the evening and electric conversion kit has been performing very well. The route is quite hilly in places and the hub motor struggles a bit up the hills so I always apply some pedal assist in this situation. A couple of times towards the end of last week and again this morning when I have been applying the brakes on a steep downhill, there have been about 4 sounds from the horn and the motor has cut out. The first couple of times I switched off the power then back on again and the motor started again. This evening it occurred again and no amount of switching the power on and off would restore the motor to action. Instead each time, the horn sounded about 4 times, then stopped.

I started to ride with everything turned off but I noticed that the electric bike motor wheel felt rough and resistant to rotating. The electric bike motor wheel does not turn freely at all now. It feels as though the motor has seized.

I was relying on the bicycle with electric bike motor to get me to work so it is quite a problem.

I am happy to ship the hub motor back to you but not by air as it is too expensive. I was reading on the leafmotor’s forum that the HBL hub motor is better for hills. I would have bought this but it is not yet available for 20 inch wheels. If my hub motor is in fact unrepairable, I would like to have its replacement exchanged with the hbl hub motor for the 20 inch wheel – I am happy to pay the difference between the cost of a replacement for my hub motor and the hbl hub motor when it is available.

From above case,we are sure the bldc motor controller was broken that because of over-current brought high temperature and broke the MOSFET.
So your hub motor electric conversion kit can’t work.

Hub motor,electric bike motor,electric conversion kit supplier: Leaf Motor Technology Co.,Ltd.