Tag Archives: brushless motor - Page 2

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.

BLDC motor and brushless motor

Posted by on January 7, 2022 Comments Off on 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.

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.