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.
Monthly Archives: January 2022 - Page 7
electric tricycle and electric bike conversion
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
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
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
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
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
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.
Leaf Motor motor kits for bicycles business
Leaf Motor Technology Co.Ltd. Is the sole producer of motor kits for bicycles business. Production of motor kits for bicycles, anchor bicycles, Wanda bicycle, bicycle engine kit, electric tricycle, etc. Wanda reputation sun long, famous, sales network covered the country, exports amounted to more than 50 countries and regions. Flying Pigeon bicycles in 1954, the first national qualification was awarded first. Quality evaluation in the previous bike, won the national silver medal, light industry products International Fair Gold Medal, best-selling domestic goods, such as the National Award for the best after-sales service. In 2003, awarded by General Administration of Quality Supervision, quality inspection exemption certificate; the same year, “Flying Pigeon” bicycles are recognized as the top ten brands in China, and won numerous national honors certificate; 2005 “Flying Pigeon” brand was SAIC as Chinese Famous Brand in 2006, the State Department of Commerce awarded the “most competitive brand” title. Ministry of Commerce has been awarded the “old” in the title, “Flying Pigeon” as a trademark by the State Administration for Industry and Commerce, “National trademark protection brand” one.
Market-leading companies, to pursue “people-oriented, scientific management, leading technology, quality, customer first, business benefit,” business purpose all are leading to success. Company “quality first” approach, improve product quality assurance system, quality system has passed the ISO9001 international quality standard certification. Continuously develops new products to meet customers’ biggest needs. Now two hundred eight series of styles to meet different urban and rural areas, the diverse needs of different consumer groups.
Old brand, new style. Company employees will be “hard-working, strict, refinement, innovation” spirit, as the “Flying Pigeon”, such as life, depending on the user to God, in the fierce market competition, striving for excellence, integrity to far.
BLDC motor controller basic principles
bldc motor controller is the leading voltage AC motor running, widely used in electric fans, refrigerators, washing machines, air conditioners, hair dryer, vacuum cleaner, range hood, dishwasher, electric sewing machines (to be found food processing machines and other household appliances and various electric tools, small electromechanical devices.
bldc motor driver is divided into induction motors and AC commutator motor. Divided into single-phase induction motor asynchronous motor, AC and DC motors and repulsion motor.
bldc motor driver basic principles:
(1) When access to three-phase AC induction motor three-phase power, three-phase stator windings generate current flow through the three-phase symmetrical three-phase magnetomotive force (the stator rotating magnetic momentum) and produce a rotating magnetic field.
(2) The conductor of the rotating magnetic field and the rotor has a relatively cutting exercise, according to the principle of electromagnetic induction, EMF and rotor conductors induced current.
(3) According to the law of the electromagnetic force, the current-carrying conductor in a magnetic field in the rotor by the electromagnetic force, the formation of the electromagnetic torque, driving the rotor rotation when the motor shaft with a mechanical load, then out the output mechanical energy.
BLDC motor and brushless motor
For a long time, there is a big battery technology R & D bottlenecks, many countries have committed to developing higher-performance electric car motor vehicle in order to obtain improved performance, China is no exception.
As early as four years ago, the market is still in the majority of electric bicycles use BLDC motor stage. BLDC motor uses a mechanical commutation, the control system technology, less demanding, lower cost than the brushless motor, BLDC motor starting torque is slightly larger than the brushless motor.
BLDC motor has several weaknesses: short life, noise, and low efficiency. Short life because it uses carbon brush, turning the process easier to damage. Also wear a lot of toner dust generated, these dust fall gear oil, gear oil to speed up the drying, to further increase the motor noise.
BLDC motor used once a year or so to replace carbon brushes, carbon brushes replaced after one charge mileage car bought less than two-thirds of the time, but also in the climbing area seem less motivated, even burn control. This is because the carbon brush replacement motor, the commutator also grind a groove, so that the contact area to reduce the carbon brush, carbon brush of poor contact will spark power and speed and oxidation of copper commutator, resulting in the undesirable phenomenon.
brushless motor is a special kind of DC motor, it uses built-in sensor plus electronic commutator method for electronic commutation, brushless motor mainly to eliminate brush wear and brush contact noise generated.
From the low-speed electric vehicles since the advent of the motor, brush and brushless motor of the dispute has been no stop. Comparing both, brushless motor really is superior to BLDC motor, brushless motor also known for its excellent performance for the general consumer acceptance. Currently, almost all electric bikes are used a brushless motor, brushless motor instead of BLDC motor is a must.