With the development of science and technology, brushless dc motor has been widely applied to various fields of intelligent, especially in the full embodiment of the textile industry, brushless dc motor with high speed, high power, long life and other characteristics has gradually replaced the ac motor, brushless dc motor, textile equipment more and more high to the requirement of brushless dc motor, brushless dc motor in order to make full use of the above a few characteristics, some technical improvements were made on the brushless dc motor, for example: the brushless dc motor and planetary reducer, brushless dc motor encoder, higher precision,Also known as economical servo motor)Brushless dc motor, thus fully adapt to the requirement of textile equipment; Needs and with the development of the textile machinery technology, now of the textile machinery such as cone winding machine, carding machine and non-woven fabric needs a lot of speed control of dc brushless motor as a driving force. Textile machinery now there are many occasions the need to control, with a brush dc motor or induction motor with frequency converter to realize, in requiring higher precision, adopt servo motor to control. As is known to all, the traditional dc motor using brush by mechanical methods commutation, thus has relatively mechanical friction, resulting a spark, short service life and to often maintain Achilles' heel, thus greatly limits its application scope. Due to the asynchronous motivation of simple structure, low cost, at present most of them are used in industrial induction motor as a driving force. But in order to to control its speed, must match with the appropriate frequency converter, thus greatly increase the cost of the speed regulation system, and the characteristic of the asynchronous motor itself determines its control precision is not high, moreover is asynchronous motor in the low frequency (Less than 5 Hz)Running, the asynchronous motor more shaking, so that cannot be used.
the brushless dc motor is ac motor has simple structure, reliable operation, easy maintenance and a series of advantages, and has the dc motor running with high efficiency, long life, high speed etc, and the rotor structure of permanent magnet, no excitation loss, improve the efficiency of the motor. So this kind of motor in textile machinery is very wide application prospect.
