Author Archives: leafmotor - Page 11

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.

Ego-Bike conversion kit

Posted by on January 10, 2022 Comments Off on Ego-Bike conversion kit

If you’re a fitness nut, the thought of having something other than your legs power you up the mountainside is tantamount to downing a McDonalds McRib while choking down your second pack of Marlboro Reds. But for those of us less concerned with exercise and more interested in enjoying the spaces between A and B, Ego-Bike conversion kit has an answer. And it’s packing 1,200-watts of go juice.

The bike conversion kit comes complete with a battery pack, electric motor, drive system, throttle/controller and all the necessary mounting hardware to retrofit a claimed 70% of the bikes on the market. According to the German company, it can push an average rider uphill for 3,280 feet at an 80% maximum incline (around 40-degrees). If the terrain is flat, you can travel up to 25 miles and max out at 43 mph, and when the juice does run out, a full charge won’t take longer than an hour. Naturally, there’s a rub and it comes in the form of tonnage. The whole kit weights in at 9.7 pounds – hefty for even the most kitted out downhiller and unthinkable for a lightweight carbon roadie. Prices haven’t been announced, but expect sales and importation to begin later this year.

characteristics of three-phase brushless motor

Posted by on January 10, 2022 Comments Off on characteristics of three-phase brushless motor

As a matter of fact, it is rather difficult for people to analyze the operation characteristics of three-phase brushless motor accurately. Motor air gap flux density distribution along with the air gap by sinusoidal. When the winding is energized, magnetic flux generated by the current impact of the air gap is negligible. In the condition of the switch operation, the power transistor is constant pressure drop. Each winding is symmetry and the corresponding circuit is completely consistent. The relevant electric time constant can be neglected. The power of sensored brushless motor and others that control circuit are also negligible. Three-phase brushless DC motors are also synchronous motors. It is very important to protect the three-phase brushless dc motor drivers. Power transistor would be burnt down when it is overload or use improperly, because it may cause high current.

How to build brushless motor controller

Posted by on January 9, 2022 Comments Off on How to build brushless motor controller

How to build a pretty basic dual brushless motor controller? I’m going to focus on the power section in this post, and as soon as I have time I’ll discuss the code/FroBoard side of things in another post. I got started on the power section last night after a copious amount of coffee, and wrapped it up this morning- it’s a pretty simple build if you’re used to building stuff on perf board. I firmly believe that the best way to learn how something works is to build it yourself- that’s how I learned about electric cars, and brushless motor control is no exception. So if you want to learn how brushless motor controllers work, build one! A controller this size is a great place to start if you’re just getting involved in brushless motor control- I would definitely recommend starting out with something like this if you plan on building a car-sized controller. In fact, my first brushless controller was essentially half of this controller. It’s good up to around 24 volts and 1 or 2 amps per motor, but with proper heatsinking it could probably take a bit more current.

This post is written with the electronics hobbyist/motor enthusiast in mind. It’s also turned out to be a bit longer than expected; ah well. I’ll try harder next time! Most of this won’t make any sense if you don’t have a rough understanding of what brushless motors are and how they work- if you’re in that group, no worries. There are lots of great sites out there explaining those details;  unfortunately, I don’t have the space to go through it here. I’m really just hoping to take a little bit of the mystery out of brushless motor control and show that it isn’t all the black magic it can seem like- hopefully it helps a few hobbyists out there get a little further.

This controller is currently driven by two FroBoards, which is definitely more processing power than is really needed- it’s cool because it leaves room to read encoders, do serial stuff, and anything else you want to do in addition to running the motors. I’m running a whole robot off of these two FroBoards- usually, the motor controller is a separate unit, and another processor is used to handle the higher level decisions. Right now, for instance, I have a serial routine set up that lets me use a terminal emulator (MacWise in my case) to drive the robot around using the number pad on my keyboard, and there is still tons of room for add-ons. With a storebought setup, this would probably take two separate motor controllers and a processor to control them. So anyway, that’s pretty cool. That said, this power section could just as easily be driven off of a different processor or board; it isn’t specific to the FroBoard.

Likewise, it would be really easy to build a single motor controller for use with one processor or FroBoard in this style. It would just be a matter of getting rid of three of the half bridges. Anyway, without much ado, here’s a schematic for you all!

Sports bike kits

Posted by on January 9, 2022 Comments Off on Sports bike kits

They have been designed consequentl as to handle the high speeds and even the feature of winding roads. They have the ability to offer more power with the help of the multi cylinder engines; hence they are capable of providing more power. The aluminum alloy frames and the stiff suspensions have the capability to improve handling, high grip tires and even they offer the powerful brakes.The sports bikes render the bikers to allow them to lean forward over the gas tank consequentl as to reduce the wind resistance. On other sports related article like golf you can find the best Golf Drivers by visiting this blog. In the other bikes the people are made to sit straight unlike the sports bike kit wherein they rest on the gas tank. The experience on bikes is one of the most remarkable experiences it suits and caters to the needs of both the adults as well as kids. The choppers these days are one of the optimal consequentlught experiences thus attracting most of the crazy bikers. These days there are more number of people getting attracted towards the choppers and the bikes. These days there are motorcycles usable in different styles and design each of them offering with the perforgentlemance traitistics consequentl as to accommodate the specific riding conditions. This article will help you understand the different traitistics of the different categories of the bike kits. Traditionals

They are alconsequentl referred as the standards; they have the same emergeance as the Universal Japanese Motorcycle. They were built in the 1970s. The UJM was alconsequentl take into accounted to be an all purpose bike and even the standards of today offer the same versatility and straight forward design. Chrismartin is the copywriter for chopper bike kits. He has written various articles like convention Built Motorcycle,louis vuitton link, bike chopper,SC Bag Calf Leatrher Cobalt Cobalt, convention chopper kit,Utah Leather, convention chopper for sale and more.

Leafmotor announced launch of brushless motor evaluation kit

Posted by on January 9, 2022 Comments Off on Leafmotor announced launch of brushless motor evaluation kit

Leafmotor announced the launch of a new generation for the brushless motor series evaluation kit (DRV8412-C2-KIT). The kit contains two brushless dc motor which can be started directly or single department all the necessary hardware software of stepper motor.

Out of the box with the brushless motor controller and driver solution containing DRV8412 motor drives, real-time control C2000 ™ Piccolo ™ microcontroller (MCU), controlCARD module, Quick Start GUI, comprehensive development of the source code, Code Composer Studio ™ (CCStudio) integrated development environment (IDE) and a variety of motors;

Modular control architecture for the application select the appropriate level of processing performance to provide a high degree of flexibility. In addition to C2000 controlCARD module outside, TI will provide more in 2011, the MCU options;

With integrated MOSFET’s DRV8412 motor drive compared with competing solutions can be Rdson sharp drop 3 times, up to 97% efficiency, and provide voltage in 50 V 6 A (continuous value) / 12 A (peak ) current without expensive heat sink.Besides, DRV8412 motor driver chip also includes advanced protection features, such as periodic over-current, over temperature and under voltage protection, can significantly reduce design complexity, board space, and ensuring higher system reliability;

C2000 Piccolo MCU support control, communications, and debugging. Industry-leading 32-bit embedded MCU in the C2000 MCU device family integrates the most advanced control peripherals and CPU functions. Free controlSUITE ™ software can get the most comprehensive combination of software modules brushless motor controller, real-time debugging and debugging open reference design;

C source code and use-based GUI can demonstrate one or two brushless dc motor voltage and current control and a stepper motor speed and index (with up to 128 micro-steps).

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.