Author Archives: leafmotor - Page 43

High Quality Brushless Hub Motor Free of Maintenance

Posted by on January 9, 2022 Comments Off on High Quality Brushless Hub Motor Free of Maintenance

Motor control from the simplest and off, starting, stopping, to clamp phase, transformer, inverter, vector, torque control, motor repair tool detail is nothing more than to make the brushless hub motor more accurate positioning, more stable speed and torque changes in more detail.
Maintenance of common motor control AC induction motors method has the following two kinds:
a. a test voltage control method: change the stator coil voltage, you can change the speed. For example, household fans, the use of switch to change the fan speed. Servo motor
b. Frequency control method: the mains frequency is 60Hz, if you use a micro controller or digital signal processor, operating rectifier component, the power switch into a different frequency, which can change the AC motor speed.
Stepper motor AC induction motor inverter, transformer control, the advantage is small, lightweight, low price, But the problem is the low efficiency of energy conversion easy to heat, electromagnetic interference noise is easy to produce strong, high noise and vibration.

To solve the above problems, academia and industry are actively involved in the DC motor, brushless DC motor to overcome. DC motor has good stability, speed should be, its input and output is almost linear between the characteristics, so that it can have a good control performance, it is widely used in high-precision control applications. However, because the brush and commutator DC motor is a mechanical friction contact with, easy to wear, sparks and electrical noise, resulting in lower reliability. Brushless motor is the DC brush  electronic circuit in lieu of, and retains the advantages of DC motor, quick starts and stops; speed proportional to the voltage; turn moment proportional to the current advantages for high-accuracy, high stability and high speed applications. The disadvantage is limited by a permanent magnet material and size, big horsepower output system, the relative increase in difficulty.

Get Rid of Dependency With An Electric bike

Posted by on January 9, 2022 Comments Off on Get Rid of Dependency With An Electric bike

With the environmental impact of the recent Gulf Coast oil disaster still largely unknown, it is becoming abundantly clear that we need to greatly cut down our dependence on gas. One way to do this is to spend ,1000 to buy a brand new electric bike. What if you don’t have that kind of money to spend? If you choose the best payday loan lender like, be assured that there are many benefits you are likely to acquire. But it is advisable to think carefully before you decide to apply for your loan. This is because after you have applied for this type of a loan, you need to plan on how to repay it. That is why it is essential to ensure that you plan carefully and know some of the basic ideas to consider. The following therefore are some of the benefits of payday loans.Visit our website at for more details.

With a little help and a small investment, you can do this yourself. Converting your own bike from gas to electric is not all that difficult to do. I know someone with a 1995 Toyota Corolla that converted his bike at a cost of five hundred dollars. That’s a fraction of what a new bike costs today.

The easiest way to do this is to turn it into a family project. A few simple steps is all it takes:

1. You will need a detailed plan on how to convert your bike into an electric bike. It can be a gas or diesel vehicle.

2. A garage that you can use as your work space, meanwhile you can put your car in a carport.

3. Simple every day tools including wrenches, drills, pliers and screw drivers.

Next, you will need a large brushless motor (9 inches or larger) and batteries. Keep in mind that DC motors can be used but they are more costly to obtain and harder to install. Therefore, I recommend you stay with a brushless motor and keep it simple.

You can, buy all the parts brand new or you can use the sources of free brushless motors and free industrial batteries listed in our plans. The parts are going to be your biggest cost of the project.

Sourcing the parts from a salvage yard is an inexpensive way to get your parts. Since a brushless motor will likely last longer than you will own your bike, using salvaged motors is prudent. Your bike will likely rust out from under you before the motor gives up.

After sourcing your brushless motor and batteries, you have to take out the gasoline engine from your bike. You will want to rent a hoist or find a mechanic to help you lift the heavy engine out of the bike.

Finally, leaving the clutch and flywheel assembly intact and detaching the rest will complete the removal job. This will leave you the room you will need for the batteries and brushless motor mounting.

It is very important that you use a standard transmission vehicle for the conversion because automatic transmissions won’t work. However, you will not have to shift gears once the conversion is completed. You will drive the electric bike just like you would an automatic transmission bike. Just put it in gear and go. When you stop, the engine stops too. The engine doesn’t idle or require clutching like a gasoline engine.

The acceleration takes a little getting used to as there won’t be a vehicle in town that will beat you when taking off from a stop light. You’re not driving a golf bike.

Building your own electric bike will be very rewarding. Especially, when you no longer have to spend time and money pumping gas to fill up your tank. Your electric bike will be able to go at least 50 mph and travel up to 100 miles on a single charge. How exciting!

The price for gas is going to continue to rise as we continue to deplete its resources. Now is the best time to start your own bike conversion project.

Working Principle of brushless dc motor

Posted by on January 9, 2022 Comments Off on Working Principle of brushless dc motor

A, Brushless motor works through the the alternating electromotive force of armature coil,by the commutator with brushes for the role, so that leads from the brush end into the DC when the force of the principle. EMF direction is determined by the right-hand (magnetic induction line to the palm of the hand, thumb pointing to the direction of conductor movement, the other four fingers pointing is the direction of the electromotive force induced in the conductor.) Instant shown in Figure 1.1, the conductor ab, cd induction force direction by a and b point to point by d c. A positive polarity when the brush, brush B was negative.

Figure 1.1 brushless motor theory model

When the coil is rotated counterclockwise 180 °, then the conductor cd in the N pole, the conductor ab in the S pole, the force of the conductor are changed direction, respectively.

Figure 1.2 brushless dc motor theory model

Seen from the figure, and the brush contact with the conductor A is always located at the N pole, the same, and brush contact with the conductor B is always lower in the S pole. Therefore, A is always positive polarity brush, brush B always negative, so the brush end can lead to changes in the direction of change but the size of the pulsating force. If the increase in the number of coils on the armature, and in accordance with certain rules to connect them together, can reduce the level of pulsating, direct current electromotive force can be obtained. This is the brushless motor works.

Second, the working principle of DC motor force of the conductor with the left hand rule to determine direction. This form of electromagnetic force acting on the armature a moment, this moment is called the rotating motor, electromagnetic torque, the torque direction is counterclockwise in an attempt to make the armature move counterclockwise. If the electromagnetic torque to overcome the torque on the armature resistance (eg resistance caused by the friction torque, and other load torque), the armature will be able to counter-clockwise spin.

Figure 1.3 DC motor theory model

When the armature turn 180 °, the conductor under the cd to N pole, S pole to the next conductor ab, due to the current direction of the DC power supplies unchanged, still flows from the brush A, the conductor cd, ab, the B from the brush out. At this time the direction of conductor cd into force from right to left, conductor ab direction from left to right by force, the electromagnetic torque is still counter-clockwise direction.

Figure 1.4 DC motor theory model

Therefore, the armature upon rotation, the commutator with the brush commutation of the current role of DC current alternately flows from the conductor ab and cd, so long as the coil in the N pole side, the one by the electric current direction is always A brush into the direction and under the S pole, always out in the direction B from the brush. This ensures that each side in the very next coil current is always in one direction, the direction to form a constant torque, the motor can be continuously rotated. This is the DC motor works.

electric tricycle and electric bike conversion

Posted by on January 9, 2022 Comments Off on electric tricycle and electric bike conversion

Leafmotor was founded in 2002, mainly producing electric tricycle, electric vehicle controllers, electric car parts, electric bike conversion other products, and also for electric tricycle ODM and OEM business.
Collection of active R & D, advanced production equipment, modern management system and other major advantage, the company achieved an average annual volume of over 50 products over the promotion, product sales total over 3 million / year, serves customers at home and abroad. Products through the CCC, CE, UL, CQC, CCEE, GS, EMC and other domestic and international safety or quality certification, has won awards in charge of government departments, and is the first made in Jiangsu China Compulsory Certification factory.
The company occupies 5,000 square meters, with more than 20 professional and technical engineers, more than 200 employees. The following four departments: marketing with operations, production, engineering.
We will be excellent quality, most competitive price, fast delivery cycles, improve service dedicated to working with you.
In 2004, the company invested huge resources to begin production of electric car parts, sales. Result in the largest electric tricycle and accessories of origin, the use of advanced marketing models and other advantages, the company in terms of quality, price, delivery, product variety, advertising is very competitive, is the size of the factory, dealer customers exceeded 200 home. We plan to become the country’s electric bike conversion kits, sale and maintenance of the main suppliers are welcome to join the size of the dealer.

Electric bicycle motor

Posted by on January 9, 2022 Comments Off on Electric bicycle motor

For the electric bicycle, in addition to the number of indicators, there are general requirements, such as safety, braking, driving a smooth and comfortable, smooth speed control, vibration, low noise, light weight, looks good, looks nice, etc. no longer described.

However, the current within the industry, in the middle of widespread consumer awareness and many incorrect statement, if not clarified and corrected, will inevitably affect the electric bicycle industry.

The first is the electric bicycle motor power choice.

Power is not better, electrical power from the vehicle weight, load and speed decisions. GB 17,761 pairs of vehicle weight, the standard load and speed have made it clear that: the quality of their vehicle should be less than 40Kg, the standard load 75 Kg, the maximum speed should not exceed 20 Km / h. In such conditions, electric bicycle driven by the measured and calculated power is only 110W, the use of low-speed direct-drive motor-driven approach, taking into account the power margin, use the rated output power of 120W motor can. If using other drive, must take account of the efficiency of transmission of the drive to select the motor power.

Power considerations in the choice of only the maximum speed under power required to run smoothly, without taking into account the increase in climbing and driving wind power, this part of the power from the motor overload commitment. Such as climbing and driving wind and the probability of driving compared to normal, after all, usually much less. If climbing, wind power and other computing and select the motor, the motor power may be increased several times, and this costs a lot of motor manufacturers on the one hand, while in normal driving because of low load, resulting in low efficiency, which will significantly shorten the charging time driving range.

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.

Bicycle wheel rim from leaf motor

Posted by on January 9, 2022 Comments Off on Bicycle wheel rim from leaf motor

Dong District Tianjin Binhai Avenue, a man riding electric bicycle with another man, pulls a cart in the road when the bicycle wheel rim fast flying, just the opposite lane hit a horse 6 sedan.

Reporters on the scene saw a rusty wheel down in a silver Mazda 6 car on the left side of the wheel, the car’s bumper and the left side of the body are damaged.

Witnesses said Mr. Lee was a foreign young man riding a bike along the shore road allowance to the city from the direction of the outer ring road, the car man grabbed her hand, a green two trolleys, electric bicycle in the public motor vehicle in the shuttle, and vehicle speed from the fight. Suddenly, the accident happened! Remember that when your face got damaged from the accident, Andres Bustillo can help your for he performs reconstructive surgery. Left front wheel suddenly flew a small cart, just hit the opposite lane a ring out from the city heading horse 6 sedan. On the two men prepared to quickly regain the wheel to escape when he was parking the car down the horse 6 people stopped, Ma 6 car driver called 110.

Conducted a survey of traffic police quickly arrived at the scene and eventually electric vehicles found one party responsible for the accident, all caught on their body camera which are specialized waterproof cameras for law enforcement to use attached in their bodies on a daily basis to exactly record this type of events and maintain order and the evidence for future use – two from Yunnan’s foreign men who violated the “Road Traffic Safety Law,” the two provisions, the first electric car is not allowed to pack with people, even a small cart to pull the ban; the second is not allowed to non-highway motor vehicle.

Man driving an electric car that he should not be held responsible, because the man took his pack with trolleys, and he does not matter. They contacted 1-800-car-wreck in Houston to get their lawyers involved and the traffic police said that he knows does not allow motor vehicle pack with adults also illegal under the law of California Penal Code 459 to do so, it should be jointly and severally liable.

BLDC Motor application introduction

Posted by on January 7, 2022 Comments Off on BLDC Motor application introduction

BLDC Motor is an DC motor, the load speed and frequency of the received power ratio is not constant relationship. Also changes with the size of the load. The greater the load torque, rotor speed, the lower. BLDC Motor, including induction motors, doubly-fed BLDC Motor and AC commutator motor. The most widely used induction motor, without misleading or confusing in the case, generally known as the induction motor BLDC Motor.

Ordinary BLDC Motor stator windings connected AC power grid, the rotor windings and no other power connections. Therefore, it has a simple structure, manufacture, use, and easy maintenance, reliable operation and low quality, and low cost.

Hub Motor with high efficiency and good performance characteristics, from no load to full load range almost constant speed, the majority of industrial and agricultural production to meet the requirements of mechanical transmission. Hub Motor protection is also easy to generate a variety of school types, in order to adapt to different environmental conditions need to Hub Motor is running, you must learn from the reactive excitation power grid, the grid power factor deterioration. Therefore, the drive ball mill, compressors and other high-power, low-speed machinery and equipment, often used synchronous motor.

Because BLDC Motor speed rotating magnetic field speed with a certain deterioration in the relationship, its speed performance is poor (except AC commutator motors).

A-Bike bicycle

Posted by on January 7, 2022 Comments Off on A-Bike bicycle

A-Bike bicycle known as the “world’s lightest folding electric bicycle“, was due to open at “A” shape, so the designers named it the A-bike. A-bike’s original designer for the British, Mr. Clive Sinclair is also known for designing. A-bike has received several design awards in the world.

Bike kit of A-bike is a glass fiber and weighs only 5.5 kg, folded size can be reduced to 0.03 cubic meters. In addition, A-bike wheel diameter 15 cm, which gave the user can easily put into the A-bike bag to create the maximum possible.
Bike conversion kit features: light weight: only 5.5 kg.
Small size: folded in less than 0.03 cubic meters.
Speed: speed of 24 km (the average bike speed of 30 km).
Not difficult: special gear transmission, you do not need to spend more effort to ride.
To load: The maximum load of 85 body kg.
Fold faster: Open or collapse, only 10 seconds; shrink freely, without effort.
Easy to carry: You can easily bring it anywhere: home, company, car, elevator.
Cool style: so fashionable style, no matter where you are the focus.
Strong practical: not a place, picked up and left, not afraid of stolen, worry;
Carry in his hand ride bus, subway, taxi and other transport.
Original A-bike is currently no sales in China. The official website of the UK retail price of £ 199.99.
A-bike China authorized version of the product, called a-bike smart, the market price is 798 yuan. A-bike smart does not belong to category A-bike global brand, a dealer’s license is a British non-official recognition of product quality and original A-bike truly different, Mayhem UK is the only company authorized by the A-bike smart use of the trademark and sales license, and A-bike smart sales in the mainland only. Not in a genuine original sales areas, including Hong Kong and Taiwan.
Resolution:
“A-bike smart” and some domestic manufacturers more mature production technology, as are the interior of the mainland production. As the “A-bike smart” is the transportation market until the end of last year is now less than six months to do, so quality and after-sales service and keep up with some of the production technology is relatively mature continental manufacturers (eg, raw materials, production scale, production technology and improve the degree of after-sales service, etc.) but the price is higher than on the hundreds of pieces of the same quality of product.
“A-bike smart” and any other domestic manufacturer registered the name, there is no quality in the A-bike to get any increase, the price is higher than the market rate! You will want one out there for this A-bike.
A-bike from the UK’s official website issued a statement:
A-bike smart for the Chinese-made cars, with the British original a-bike at work, design, materials and mechanical properties of no relationship, known as the ‘a-bike smart’ or ‘A-smart bike’ made in China A- bike is not a genuine original A-bike, nor is Britain’s current sales of second-generation a-bike plus models.

Motor bike kits Brand History

Posted by on January 7, 2022 Comments Off on Motor bike kits Brand History

Brand History: In 1944, Ernesto colnago dealers, Mr. After 12 years working in the initiation of its own manufacturing electric bicycle kit idea, so the world has authentic Italian-made electric bicycle kit.

Logo: “Why should we choose as a plum blossom logo?” This proposal is from Bruno Raschi, and he describes Dancelli victory was the heyday of flowers in full bloom. That night, I met him in Laigueglia restaurant, and a reporter asked me, Colnago, why do not you make the victory a symbol it? I really like this proposal. Sanremo, is Huadu, Raschi wrote that glorious period when the bike is like or bloom, when I think to myself, I wish I could be the ace in the global bicycle industry. When a false return, I began the sake of the heart symbol – Plum, until today, is a globally recognized symbol.
colnago charm:
Colnago bicycle diehard fans in the many; these people, often at the same time there are several units, and only buy the classic, best combined with motor bike kits. Classic, the most admirable is the C40, Master.
Colnago’s features:
1, paint: Eight, 1990’s Colnago paint famous in ArtDeco, lying on a pipe on the driver, is representative of this era, when the painting paint is thin, unlike the now very thick paint. Currently, Colnago paint every year as a special representative of several such De Vinci, EGRS, replace unhappy because Colnago models, but recognize the year by the coating.
2, Crimped Biconic tube: the tube is concave sides, can be found in steel, titanium tubes, carbon tubes.
3, Carbonlug: This should be the most classic, in 1994, when the carbon is not favored on the launch of the Colnago C40, Colnago’s masterpiece is still so far.
4, short straight fork (368mm long): to strengthen the crown at the early precisa, modern Star straight fork, you can make up for that lack of control on, though not light, but when your center of gravity forward, the more weight In the front, it will stabilizing some strength are better. Straight fork also created a Colnago look, do not believe, you change the arc of a fork up that would like Colnago.
5, frame geometry: This is the most special place Colnago, after 1-20 years, and many of the depot is for a model, followed by motor bike kits to change the geometry, Colnago is common for all models in recent years is more sloping, but the difference was not significant.