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Coreless Motor Principle And Application Of The Future
- Nov 13, 2017 -

Coreless motor in the structure of a traditional motor structure of the rotor broke through the use of non-iron core rotor, also known as Coreless rotor.

    This novel rotor structure completely eliminates the loss of electrical energy due to eddy currents in the core and at the same time greatly reduces its weight and moment of inertia, thus reducing the mechanical energy loss of the rotor itself. Due to the structural changes of the rotor motor performance has been greatly improved, not only with outstanding energy-saving features, more importantly, with the iron core motor control and drag characteristics can not be achieved.

    Coreless motor is divided into two kinds of brushless and brushless, brushless Coreless motor rotor without iron core, brushless Coreless motor stator without iron core.

    Triangle connection winding method.

main feature

 

    Coreless motors are:

    1, energy-saving features: high energy conversion efficiency, the maximum efficiency is generally above 70%, some products can reach 90% (iron core motor is generally 70%).

    2, the control features: start, brake quickly, fast response, the mechanical time constant is less than 28 milliseconds, some products can reach less than 10 milliseconds (iron core motor generally more than 100 milliseconds); recommended operating area in the high-speed operation state , You can easily adjust the speed of the sensitive.

    3, drag characteristics: running stability is very reliable, small fluctuations in speed, as the micro-motor speed fluctuations can easily be controlled within 2%.

    In addition, the energy density of the Coreless motor is greatly improved, and its weight and volume are reduced by 1 / 3-1 / 2 compared with the iron core motor of the same power.

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application

 

    Empty Coreless motor to overcome the iron core insurmountable technical obstacles, and its outstanding features focus on the main performance of the motor, so that it has a wide range of applications. Especially with the rapid development of industrial technology, the servo characteristics of the motor continue to put forward higher expectations and requirements, making the Coreless motor has an irreplaceable position in many applications.

    Coreless motor applications, from the military, high-tech fields into the large industrial and civilian areas, the rapid development of more than 10 years, especially in industrialized countries, has been involved in most industries and many products.

    1, need to respond quickly to the servo system. Such as the rapid adjustment of the missile's flight direction, high-powered optical drive follow-up control, fast auto-focus, high sensitivity recording and testing equipment, industrial robots, bionic prostheses, Coreless motor can meet its technical requirements.

    2, the drive components require a smooth and lasting drag the product. Such as various types of portable instrumentation, personal portable equipment, field operations equipment, electric vehicles, the same set of power supply, power supply can be extended more than doubled.

    3, a variety of aircraft, including aviation, aerospace, aeromodelling and so on. The use of Coreless motor light weight, small size, low energy consumption advantages, can minimize the weight of the aircraft.

    4, a variety of civilian appliances, industrial products. Coreless motor as the implementation of components, can improve product quality, superior performance.

    5, the use of its energy conversion efficiency advantages, but also as a generator; use of its linear operating characteristics, but also as a tachometer generator; coupled with reducer, can also be used as a torque motor.

    With the progress of industrial technology, a variety of mechanical and electrical equipment, strict technical conditions on the servo motor put forward higher and higher technical requirements, at the same time, the application of the Coreless motor has completely out of the limitations of high-end products, is rapidly expanding at General civil and other low-end products on the scope of application to enhance product quality. According to statistics, in the industrialized countries already have more than 100 kinds of civilian products on the mature use of the Coreless motor.



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