Category Archives: hub motor - Page 21

electric bike kit for e-bike

Posted by on January 15, 2022 Comments Off on electric bike kit for e-bike

Q:I want to buy for my Merida cross 5100:
-Front bike hub motor 48 V/ 1000W
-48V Thumb Throttle
-Battery LEV-High Speed 4812
– wires to throttle and battery.

But I have the questions:
1.I need spokes for 28″ wheel. Are they attached to motor, and how much are they if not?
2. The battery could be fixed only on trunk or on frame too?
3. I`m living in St. Petersburg, Russia. What type of delivery is most economic and how much it will be?

Answer 1:The most economic is that ship by international parcel.It’s much cheaper than EMS.We often use this way to ship packages to Russia.But It takes long time to ship and hard to track the status of package.
About your order,I want to give your some suggestion:
1.This 48V/1000W motor is good.Most of our customers have used this motor more than 3-5 years and never meet problem.
2.Thumb throttle,No problem
3.Li-Battery costs expensive,but its life is short.Though many battery companies called their batteries have high quality,it’s not true.Most of Li-batteries will meet problem in 1 year.For example:your notebook PC’s li battery.
Do you have brushless controller to drive this 28″ hub motor?

Answer 2:spokes may in attachment hub motor
please email to leafmotor:sales@leafmotor.com
You also order electric bike conversion kit on leafmotor’s internet shop.
And DIY your favorable bike kit.

16 inch 36V 250W front electric hub motor kit

Posted by on January 15, 2022 Comments Off on 16 inch 36V 250W front electric hub motor kit

With the price of gasoline rise and pollution,a bicycle is good for an environmentalist.

Riding a bicycle is a great non-polluting way to get exercise and get around, but a steep hill or a long commute can turn into an unpleasantly sweaty affair. Converting a bicycle into an electric bicycle can create a vehicle with all the advantages of a regular bike, but with a little power assist to get past the disadvantages. You can assemble a set of components on your own or buy a matched electric bike conversion kit!

Compare to buy a new electric bicycle,order an electric bike kit to convert your existing common bicycle to be electric,less cost.

Leafmotor has one new type of e bike kit for old men and children.
It’s a 16″ front 36V 250w electric bike kit that includes:
1.16″ 36V 250W front casted brushless gearless hub motor is fit for 100mm front fork.
2.36V 250W 6-MOSFET brushless motor controller working with LCD,display speed,mileage,battery gauge..
3.Twist throttle or thumb throttle(default is twist throttle)
4.Brake lever
5.Three button ON/OFF switch is used to control front&rear lights,horn,cruise…

This hub motor is make up of aluminium hub,cover,magnet,rotor, winding,axis etc.The net weight is about 5.13kg,use 16×2 1/4″tyre. Motor speed,we can customize according as your actually need.

Bldc stepper motor for electric bike

Posted by on January 15, 2022 Comments Off on Bldc stepper motor for electric bike

In the subsection of section Classification of electric bikes we looked at options for motors used in electric bicycles, their positive and negative sides.

Let’s try to analyze and compare the characteristics of electric motors (bldc hub motor and bldc stepper motor)from one well-known manufacturers: Leaf Motor (China).

Leaf Motor produces sets with a motor-wheels, and the other kits that use a chain drive.
The analysis will be based on data from well-known owners of electric bikes site EValbum, the characteristics of the manufacturer, and other sources on the Internet. Therefore all figures are approximate, and the findings are an expression of opinion ePowerBikes.ru

As stated by bldc hub motor, voltage motor-wheel independent maximum speed:24V – 25 km / h, 36V – 32 km / h, 48 V – 50 km / h. These data are confirmed by practical measurements elektrovelosipedistov. The maximum velocity at the start line set bldc stepper with 42 km / h and end with 120 km / h. Those cyclists who speed up to 30 miles is enough, can choose a motor-wheel 24V,36V,or 48V.

For practical information, electric bikes with a motor-wheel 36V 500W and lithium-phosphate battery 10Ach a maximum speed of 32 km / h and can cover a distance of 50 km. For those who want to ‘fly’ at speeds above 50 km / h, suitable set of Leafmotor 601kit-1 48V 1000W e bike kit.

Compare sets with the same maximum speed – 45 km / h – a new set 601kit-1 48V 1000W bldc hub motor and bldc stepper 48V 500W. Based on the characteristics of graphs,we choose the rate at which engines operate most efficiently, it is 40 km / h for both.

For the same power consumption in this mode – 420-440 watts, at the time of bldc stepper motor is a little more, but this is neglected. It turns out that energy costs are the same at a speed of 40 km / h. We obtain a theoretical figure 10.5 Wh / km, although in practice the number is likely to be greater. Now suppose that we face a steep hill. The maximum torque developed HBL hub motor – 30 Nm, bldc stepper motor – 38 Nm.

For the calculation we use a calculator elektrovelosipedista. Let Curb weight of a bicycle with the stepper motor – 100 kg, the rise of 7% of 3.5 km. To overcome this recovery time is needed more than 26 Nm on the wheel 26. ” Power expended by the motor-wheels 601kit-1 e bike kit is more than 1060 W at a speed of 35 km / h. Total energy costs – 106 Wh.

What makes it with bldc stepper-kit? He switched to the lowest gear, increasing time and decreasing the rate of 2.4 times (for cassettes with a maximum star 34t). At 2600 revs / min, torque on the shaft of the gearbox – 11 lb lost by power – 390 watts, speed – 14.5 km / h. Cost of energy to overcome lift – 94 Wh. Switching gears allow the rider to use the bldc stepper with the maximum efficiency of ~ 83% versus 73% for motor-wheels 601kit-1. As you know, the availability of transmission system for a bicycle greatly expands the range of effective use of a set of bldc stepper motor. These are one of the best available right now,s o if your´re looking for one, check it out. 9-14 cassette on the wheel 26 “will change the torque of 6 to 60 Nm and a speed in the range of 11.5-45 km / h (about 2100-2900 revs / min) at an efficiency of above 80% (included efficiency gearbox and chain drive). Efficiency of the motor-wheels 601kit-1 has a maximum value of 78% of torque 10-16 Nm.

It is logical that upon arrival at the ideal surface Bonneville Salt Lake in Utah, at 40 km / h, both test sets will spend the same amount of energy. But as soon as the trial will move to an area with hilly terrain, a set of bldc stepper will be more economical than 601kit-1, and of course will be able to overcome the ups who his opponent will not under force.

We note again that the higher efficiency is achieved when using leafmotor’s bldc stepper motor in the range of maximum efficiency, extended thanks to gear bike.

hub motor and the BLDC motor

Posted by on January 13, 2022 Comments Off on hub motor and the BLDC motor

Synchronous and BLDC motor are AC powered motor is AC power supply by 50 weeks and turn. BLDC motor is the stator into the alternating current, a rotating magnetic field, and the rotor magnetic field generated by the sensor, so that two magnetic field, along with the rotor and the stator rotating magnetic field rotation. Which slow the rotor than the stator rotating magnetic field, there is a deterioration of sync so called asynchronous machine. The hub motor stators with the BLDC motor, the rotor is formed artificially by adding the same DC magnetic field, so that the rotor on the stator rotating magnetic field along with the simultaneous turn before said hub motor. BLDC motor is simple, low cost, easy to install, use and maintenance. So widely used. Disadvantage and low efficiency, low power factor on the grid negative. The hub motor is a capacitive load, high efficiency, can improve the power factor, multi-purpose large-scale mining did not prepare.

hub motor and the BLDC motor stator windings are the same, the main difference is that the rotor structure. hub motor’s rotor with DC excitation windings, so they need external excitation power, the introduction of current through the slip ring; the BLDC motor’s rotor is short-circuited winding, the current generated by electromagnetic induction. In contrast, hub motor is more complex, high cost.

Uses: hub motor generators are mostly used in large-scale applications. The BLDC motor is used in almost all motor applications. hub motor can be flexible and adjust the input side of the excitation voltage and current phase, that is, the power factor; BLDC motor power factor is not adjustable, generally between 0.75-0.85, so in some large factories, BLDC motor used more often, you can attach a hub motor to do tune cameras, used to adjust the factory interface with the grid power factor. However, the hub motor, high cost and maintenance workload, compensation is now generally use capacitive power factor.

Comparison of motor start-up mode

1 Direct start: by the power capacity limit

2 series reactor startup: starting torque is not easy to lead, may be secondary impacts.

3. Autotransformer start: start a buck, there are secondary impacts, adjustable voltage range is limited.

4 soft-start variable resistance: thermal resistance, fluid resistance,

5. Magnetron soft start: adjust the conduction angle of SCR power controller to regulate the flux of change.

Soft-start frequency: AC – DC – AC mode, the voltage can be controlled to become the frequency AC power for high voltage motors.

Motor star delta starter

1 When the load on the motor starting torque is not critical but also limit the motor starting current and the motor to meet the 380V / Δ wiring conditions in order to start using delta method;

2 The method is: when the motor starts the motor connected as a star after a successful connection when the motor starts to divert into a triangular electrical wiring (by double-throw switch quickly switch);

3 due to motor starting current and power supply voltage to provide start-up time is proportional to the current full-voltage start-up current is only 1 / 3, but only full voltage starting torque starting torque for 1 / 3 Star delta starter, is a step-down start it at the expense of power in exchange for reducing the cost of starting current to achieve. It can not be dismissed and the size of the motor power required to determine whether a star delta starter, but also to see what kind of load, generally need to start light load, heavy load operation can still be a star delta starter, under normal circumstances, squirrel-cage motor starting current is 5-7 times the running current, and voltage requirements of the grid is generally plus or minus 10% (I remember) in order not to form the grid voltage is too large so the impact of a star delta starter, the general requirements in squirrel-cage motors power transformer rated power of more than 10% will use star delta starter. Only squirrel-cage motor was a star delta starter.

Basics of an Electric Hub Motor

Posted by on January 12, 2022 Comments Off on Basics of an Electric Hub Motor

There are two main types of electric bike motors, each with their own set of features and functions.

The hub motor:
• The motor is compact in size to fit into the wheel.
• Most hub motors provide great efficiency with relatively low noise.
• Many of the leading companies offer custom-made hub electric bike motors to fit the needs of the consumer.
• Initially, you have to set up the built-in programmer.
• The best models offer cruise control.
• The weight can range from 5-15kg, which is a lot.
• The power ranges from 250-1000 Watts depending on the hub motor regulations for the area.
• The price ranges from a $100 to as much as $500.
• It is extremely energy efficient with minimum loss of energy and the total cost of maintenance is surprisingly low.
• Generally, you have to modify the wheel to make room for the electric bike motor.

The brushless motor:
• The electric bike motor has electronic functioning.
• It is environmentally safe.
• The motor works with a DC current.
• Generally, a brushless motor has an integrated gearbox, which significantly increases the amount of motor torque.
• High speed cruising with this motor is a highly enjoyable experience.

If you intend on buying an e bike kit then it will come with one of these motors and probably a choice between wide ranges of power. E bike kits are easier to install for a first time user and a person with limited knowledge of machinery. However, if you want to construct an entire electric bike from scratch, then you should pay special attention to the electric bike motor specifications to select the kind that would fit your lifestyle.

Whether you are interested in purchasing an ebike or you’re looking into starting from scratch in order to create your very own customized electric bicycle, you will definitely need to know the basics of the electric bike motor.

Maintenance Procedures for Your Electric Bicycle Hub

Posted by on January 12, 2022 Comments Off on Maintenance Procedures for Your Electric Bicycle Hub

Keeping your electric bicycle well maintained and smoothly running is easier than you think. Some of these basic procedures are ones that you would use in a regular bike as well but practicing them regularly will add life to your electric bicycle and save you from a lot of trouble later on. Like any machine, simple maintenance procedures will help you get the most out of your electric bicycle and save you from extra expense in the future.

• Keep hub motor clean to maintain its efficiency and prolong its life.
• When cleaning the bike avoid getting too much water into hub motor. Like any motor, excessive contact with water can affect it.
• Even if you do clean the bike with water, be sure to wipe it dry to prevent rusting.
• Never leave your electric bike close to a heat source or under bright sunlight. It might damage the electric components.
• Keep your batteries charged and clean.
• Do not attempt to open up the motor, charger or other components. You might damage some of the delicate parts.
• Keep all of the mobile parts of the electric bicycle well oiled and lubricated.
• Check the brakes every few weeks to ensure that they are working properly.
• Check tires for damage and inflate them on a regular basis.
• If you are using your electric bicycle in a difficult terrain, you might need to replace some of the parts occasionally. Always buy quality components that will give you better performance and last you longer.
• If there is a problem with your electric bicycle, contact a repair shop instead of trying to fix it on your own. You might make matters worse.

If you follow these simple procedures, you’re going to get the most out of your bike and in the bargain, a vehicle that’s going to last you a lifetime.

Electric Bike Motor Dismantling Method

Posted by on January 9, 2022 Comments Off on Electric Bike Motor Dismantling Method

Electric bicycle industry, generally refers to the electrical motor assembly, including electrical heart, slow organizations. The following are talking about the electric bike motor means the motor assembly. First, remove the motor

Dismantling the motor before the motor and controller should first unplug the wire, then be sure to record the electrical lead wire color and the color of the correspondence between the controller.

Open the motor cover should be clean as a venue before, in order to prevent debris being sucked inside the magnet on the motor. Wheel well cover and the relative position of the mark. Note: Be sure to loosen the screw on the corner, so the motor casing.

Rotor and stator air gap is called the radial clearance (air gap), usually the motor air gap between the 0.25-0.8mm, when the demolition excluded bike motor complete motor failure, be sure to mark the original cover for assembly This can prevent the sweep chamber after the second assembly of the phenomenon.

Second, the motor gear lubrication

If there is brush and brushless motor have a gear wheel hub motor gear noise began to become larger, or replace the motor in gear, all the gear tooth surface should be painted with grease, grease or 3 general use specified by the manufacturer lubricants.

Third, the motor assembly

In assembling the brush motor, check the flexibility of the spring inside the brush holder, carbon brush and brush holder check whether there is grazing, check the carbon brushes in the brush where it can hold the maximum travel, pay attention to carbon brushes and commutator of the correct positioning of the to avoid carbon brushes or brush card bad grip.

When installing the motor, motor parts should first clean the surface of the impurities, so as not to affect the normal operation of the motor, and a certain firm fixed to the hub body, so as not to install due to the powerful magnet to attract, causing parts hit each other, damage.

hub motor damage

Posted by on January 7, 2022 Comments Off on hub motor damage

Most car engines are now electronically controlled fuel injection type gasoline engine, idling turn off for many reasons, first turn off idle to analyze the symptoms. If the engine enters the idle will stall, which we call “no idle”, caused by the reasons for this failure are generally: the engine hub motor damage; brake vacuum booster vacuum tube leaking; brake broken vacuum booster film; intake manifold leak; engine electronic control unit (ECU) in the idle speed control module problems. If the engine will stall at idle sometimes, and then restart normally, and we call it “intermittent idle flame”, this failure is very difficult to check, due to reasons are many, and a variety of components or circuits not completely damaged, and more occasional headache is due to turn off the engine after the restart and can return to normal, so even if due to the sensor causes the engine idle speed turn off the engine electronic control unit will think that this is not a malfunction, and will not be the engine electronic control unit record and therefore not from the engine electronic control unit fault diagnosis system to obtain information about the failure. Savannah, GA truck accident lawyer Geroge Smithe has exclaimed publicly the need to improve our detection models for this “Intermittent idle turn off” the general reasons are: the engine hub motor are catching; hub motor cortex some frayed wires; dirty idle air hole; engine throttle position sensor problem; camshaft position sensor or crankshaft position sensor has problems; engine speed sensor problem or dirty; the engine electronic control unit in the idle speed control program in question, etc. In addition, if the quality of gasoline can also cause problems such failure. Idle stall usually does not cause any harm, because the engine running at idle, often when the vehicle is stopping, if the idle speed when the vehicle stalled in the slide, due to the distance from the obstacle in front, you can take appropriate measures to avoid dangerous . Of course, if you happen to occur when the emergency brake turn off, then on the great harm, because once the engine is off, the vacuum brake booster does not work, the vehicle’s braking performance greatly reduced, and the direction of the power unit failure, the vehicle’s steering is heavy, if coupled with your panic, it is difficult to avoid a car accident but if somebody did. Generally speaking, according to an auto injury lawyer you have a legal duty to keep a proper lookout, and you have a legal duty to exercise due care. These duties are somewhat analogous to riding with situational awareness– that is, being aware of what is happening in the road environment and how that may affect you. You do not have a legal duty to anticipate the illegal behavior of others on the road. Nevertheless, if you are observant of your surroundings, and are able to assess the potential dangers posed by the actions of others, regardless of whether those actions are legal or not, you will be able to respond to potential hazards before they become actual collisions.It’s impossible to avoid intersections, but attention to the safety precautions mentioned above will reduce your risk of virtually every type of collision in an intersection.

Wheel hub motor of electric vehivles

Posted by on January 7, 2022 Comments Off on Wheel hub motor of electric vehivles

Wheel hub motor is one kind of electric motor of electric vehivles.

Electric bike hub motor has different forms based on their different frequencys and environmental conditions . Hub motors Characterized by different forms also have different features. Now widely used in electric vehicle motor permanent magnet DC motor. The so-called permanent magnet motor, is the use of permanent magnet motor coil excitation, do not use the coil excitation means. This eliminates the excitation coil power consumption when working to improve the mechanical and electrical conversion efficiency of the motor, this car is limited to the use of electric vehicles in terms of energy, can reduce the driving current, the line continued to extend the mileage. Electric vehicle motor according to motor power in the form of points, and the brush motor can be divided into two major categories of brushless motor; according to the mechanical structure of the motor assembly points, generally divided into the “teeth” (the motor speed is high, need to go through gear deceleration) and the “no teeth” (motor torque output without any slowdown) two categories.

Electric bicycle hub motor mechanical structures

Posted by on January 3, 2022 Comments Off on Electric bicycle hub motor mechanical structures

Electric bicycle hub motor mechanical structures:

Brush motor and brushless motor have different energization principles, and their internal structures are not the same. For the electric bicycle hub motor, the motor torque output (whether through the reduction gear body) is not the same, then they will have different mechanical structures.

1, Common high-speed brush motor internal mechanical structure. This wheel hub motor from the built-in high-speed brush motors heart, reduction gears, clutch, wheel cover and other components. Brush with high-speed hub gear motor is within the rotor.

2, common low-speed brush motor internal mechanical structure. This wheel motor from the carbon brushes, commutator, rotor, stator, motor shaft, motor end caps, bearings and other components. Brush speed gearless hub motor is external rotor motor.

3, common high-speed brushless motor of the internal mechanical structure. This wheel motor from the built-in high-speed brushless motors heart, planetary roller friction, overload clutch, output flanges, end caps, wheel housings and other components. High-speed brushless geared hub motor is within the rotor.

4, common low-speed brushless motor of the internal mechanical structure. This wheel motor from the rotor, stator, motor shaft, motor end caps, bearings and other components. Low-speed brushless gearless hub motor is external rotor motor.