Tag Archives: brushless motor - Page 2

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.

leaf smart car race motor

Posted by on January 1, 2022 Comments Off on leaf smart car race motor

leaf Super model car contest rules, no restrictions on the use of motors, as long as the right, players can choose the hub motor. Having an expert auto locksmith that you can call anytime is also a good
thing to have, though not necessary. If you are having a hard time finding an auto lock smith you can find an auto locksmith company in West Palm Beach FL here.So how to choose the right motor it? Oaks from little acorns, the motor is a fundamental part of the model car, the motor will have a direct decision model cars will eventually run fast? When you want to find out how much your car is worth can be a useful resource. With an office in San Diego they can help you get you paid quickly for your car. AC and DC motors are generally divided into two, thanks to battery-powered, combined with a model car of this level, it is generally used as the drive hub motor.It may be considered an exception to the brushless hub motor, and it is essentially a AC motor. The hub motor’s basic principle is nice and simple, there is no nonsense. Fixing a car can be difficult when you don’t have the right parts, but you can easily get new Bentley Parts from leaf Car Parts.

Specifically, the optional hub motor in the following categories: general motors, coreless motor, brushless motor.

1 General Electric. Is the most common, the most common motor.

2. Coreless hub motor. Coreless DC motors are permanent magnet, servo motor, the main difference with the ordinary use of the motor is coreless rotor, also called hollow cup-shaped rotor. Coreless motor compared with ordinary motor, has the following advantages:

a. higher energy conversion efficiency (a measure of its energy-saving features of indicators): The average efficiency of 70% or more, some products can reach more than 90% (normal 15-50% in the core motor);

b. Activate the brake quickly, fast response: mechanical time constant is less than 28 milliseconds, some products can reach 10 ms or less, the recommended area of ​​high speed running state, the speed control sensitivity;

c. reliable operation stability: adaptive ability, their speed fluctuations can be controlled in less than 2%;

d. less electromagnetic interference: the use of high-quality brushes, commutator structure, change the spark is small, can avoid the additional anti-jamming device; energy density: core motor with the same power compared to its weight, volume reduce 1/3-1/2; speed – voltage, speed – torque, torque – current standards such as the corresponding parameters presents a linear relationship.

Coreless motors are divided into brush and metal brush, brush carbon brush of high melting point than the metal resistance, strong overload capacity, peak current for frequent occasions (start / stop operation, forward and reverse operation, etc.)

3.brushless motor. Brushless motor stator windings made of three-phase symmetrical multi-star connection, with three-phase asynchronous motor is very similar. Stick with the motor rotor has magnetized permanent magnet, in order to detect the polarity of the motor rotor, the motor that has the position sensor. Drive from the power electronic devices and integrated circuits, etc., and its function is to: Accept the motor start, stop, brake signal to control the motor start, stop and braking; receiving position sensor signal and inversion signals used to control the reverse change the bridge off of the power tube to produce a continuous torque; accept the speed command and speed feedback signals used to control and adjust the speed; providing protection and display, and so on.

brushless motor and other motor comparison:

Advantages of brushless, brush motor on the brush to avoid damage to the defect, long service life. Fast speed, big power.

Disadvantages brushless machine load fluctuations may not respond, and this model contest for the motor load required to withstand very large fluctuations, the use of brushless motor may be (actually bound) appears the phenomenon of motor suddenly stopped. And brushless motor voltage range of smaller, less torque, control complexity, the current large to meet the requirements of the Japanese games do not brushless motor. So the basic rule out the brushless motor.

The above point of view, the most suitable for the game is hollow cup hub motor, had previously conducted experiments on the corresponding features coreless motor has a very profound impact. However, the coreless motor has its drawbacks, first of all is the price, coreless motors are more sophisticated motor, prices are generally very expensive, but also hundreds of cheap domestic one, expensive as MAXon, FAULHABER, thousands of one. With four-wheel drive, for example, the motor would take thousands, taking into account what the backup, put quite big ah. The other is the hub motor resistance than ordinary rough ah, improper use, then easily out mechanical failure, such as brush burn, the drive shaft off, I have broken several a night, a few thousand dollars gone ah.

Therefore, most of the teams, the more appropriate is the ordinary motor, the cheap, rough-resistant, pressure is good. Ordinary hub motor can be divided into several levels, the general classification by motor diameter, such as the RC130, RC260/RC280, RC380, RC540, and so on. Freescale is the RC380 motor racing competition organizing committee to provide Renesas level is RC260 motor. Generally the larger motor, the greater the power, the same level of motor parameters are also different.

If you pick it? Example. Suppose I want the rented car that can reach up to 4m / s speed, wheel diameter of 45mm, the transmission ratio 1:6, then the motor speed at least 10000r/min, taking into account the redundancy of the motor rated speed to achieve 14000r/min, only more but, even taking into account work by the overpressure, ie 6V motor in 10V (8 * 1.2) voltage, is higher than the motor rated speed 8000r/min, then you can visit royaldrive. Another important parameter is the power, experience, 1kg 3w about model car with the motor on it, of course, the power is the bigger the better.

Japan “MCR God” Haruo Shimazu car will use a committee of four to provide the motor (Mabuchi’s RC260-18130), as shown below, you can reach 3.8m / s average speed. And in 2009, Huazhong University of Science uses four RC-280 motor. Thus, an ordinary motor, as long as the design is reasonable, selection is correct, we can achieve good results. Select the motor, it is best to buy the regular manufacturers such as Johnson Electric, yushan motor, etc., generally corresponding specifications for reference, the quality is also reliable. After a long tiring day, your cars is just like you, it wants to have a best wash it deserves. You can bring in best pressure washers for your car to make it presentable and cool again.