Specializing in the development and manufacture of a full range of high-end coreless motors.
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Frequently Asked Question

Frequently Asked Question

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Shanghai Langluo Electromechanical Co., Ltd. specializes in the research, development and manufacture of a full range of high-end coreless motors. We have a strong R&D team and manufacturing capabilities, and a professional coreless motor production line. Through technological innovation and customization, we can help you create an excellent and efficient transmission system.
We are manufacturer with twelve years experience.
Dia12-46mm brushed coreless motor,brushless motor,coreless gear motor,built-in drive motor,servo motor.
Our products are widely used in tools,medical,robotics,automation,Security doors,DMS,and other fields.
We only accept ODM. Our R&D team have six experienced engineers. Tell us your needs, we can make it.
Please kindly tell us the voltages,speed,torque and overall dimension.
Please tell us the usage of the product you want, we will give you professional advice.
Samples are available. The extra fees due to the model type.
Payment by T/T or L/C. Sample order should be 100% prepaid. For bulk order, 50% deposit, the balance paid before shipping.
Sample or small order by DHL,UPS,FedEx. Bulk order by Air or by Sea.
Sample order takes 7-15 workdays. Bulk order takes 25-30 workdays.
 Because the copper wire winding is in the shape of a cup, it is called a coreless motor.
 High conversion efficiency ------ The self-formed cup-shaped winding means that the coreless motor does not have the eddy current and hysteresis losses caused by traditional motors wound on slotted silicon steel sheets; in addition, the sintered NdFeB The use of permanent magnets makes the power density and efficiency of coreless motors much higher than traditional iron core motors.
There are two types of coreless motors: brushed and brushless: the structure of the brushed coreless cup uses copper wire windings as the rotor and magnets as the stator; the structure of the brushless coreless cup uses windings and annular silicon steel sheets as the stator. Magnets act as rotors.
Brush coreless cups are divided into metal brush types and carbon brush types. Metal brush types are quieter, but their overcurrent capability is not as good as carbon brush types, which means that compared with the same period last year, the life of carbon brush motors is longer.
Brushless hollow cups are divided into brushless with Hall and brushless without Hall. The function of the Hall element is to provide feedback on the motion position signal of the motor rotor (magnet). Generally speaking, when starting with load, brushless with Hall is mostly used; when starting with no load or light load, brushless without Hall is mostly used. This depends on the software level of the brushless driver currently on the market.
The brushed coreless motor adopts mechanical commutation and rotates when power is applied. Compared with the brushless coreless motor, the application cost is lower. However, the brushes will continue to wear out during operation and have a relatively short service life;
Brushless coreless motors use electronic commutation and require a driver to work, and the application cost is relatively high. But there is no brush wear, so the service life is relatively long.
Depending on customer needs, a planetary reducer or a spur gear reducer can be installed as a reduction motor; a magnetic encoder and a photoelectric encoder can be installed as a servo motor. Of course, the above two can also be installed at the same time and used as coreless servo reduction motors to simultaneously meet the requirements of torque increase and precise control of motion position.
As the name suggests, the structure of the planetary reducer is that three outer planetary gears surround a sun tooth in the middle. The spur gear reducer is made up of superimposed gear plates, so the load characteristics of the planetary reducer are stronger and the transmission efficiency is higher. Of course. The cost is also higher.
Due to its high efficiency, fast response, high speed, ultra-quiet, smooth rotation and other excellent features, coreless motors are widely used in various handheld tools, pumps, robot joints, model servos, semiconductors, automation, medical.
 
For regular applications, it is generally -20 degrees to +80 degrees; for special applications, custom-developed motors can support -55 degrees to +135 degrees.
Commonly used are magnetic encoders and photoelectric encoders. The cost of magnetic encoders is relatively low, and the anti-interference ability is not as good as that of photoelectric encoders.
 
The casing of brushed coreless motors needs to be magnetically conductive, so we use more free-cutting iron; the casing of brushless coreless motors cannot be magnetically conductive, so depending on customer requirements, aluminum alloy and stainless steel materials can be used.
 (Brush type) The design of our motor is to place the rated load condition near the highest point of the motor efficiency curve. This can ensure the maximum efficiency of the motor and control the motor heat to the greatest extent. Is the prototype used at rated voltage and rated load? If there is overload or stalling, the temperature of the motor will rise abnormally;
   (Brushless type) In addition to the above reasons, the software parameter settings of the brushless driver can also cause abnormal operating temperature of the motor. This can be verified through comparative testing of different drivers.
 
Compared with a motor with one pair of poles, a motor with two pairs of poles can output greater torque.
 Start and stop, speed regulation, braking, forward and reverse rotation, speed signal feedback.
 Three pcs, evenly distributed at 120 degrees.
The design of the motor is to place the rated load condition near the highest point of the motor efficiency curve, so as to ensure the maximum working efficiency of the motor. Generally speaking, the rated load torque is preferably 1/5 to 1/4 of the motor's locked-rotor torque.
Due to the PCBA installation space and heat dissipation conditions, the power device with built-in servo drive cannot be as large as the external drive, so it cannot output such a large current. If installation space and cost permit, using an external driver can release greater drive current.
Due to the stator and rotor structure of the coreless motor, the motor coil can only be made very thin, otherwise the magnetic flux will be lost, so the power of the coreless motor is generally not high. Especially for brushed coreless motors, since there is no iron core support, the connection strength between the coil and the output shaft is limited, so the power cannot be too high.
 First, you need to understand the size requirements of the reduction gearbox, then you need to understand the axial and radial load force requirements of the output shaft, and finally, you need to confirm the speed ratio requirements (pay attention to the speed of the selected motor, it is best not to exceed 20,000 rpm. If the size of the motor is large, it is best not to exceed 10,000 revolutions), and the output accuracy, that is, the rotation angle (normally above 3°, the precision requirement is below 1.5°, of course the cost will be much higher). Are there any strict requirements?
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