Dc motor brushless dc motor as wild waves into various industries, become worthy of the motor industry rising star. Can we dared guess --In the future, the motor industry will enter & other; Brushless & throughout; S? Brushless dc motor without brush and commutator, so its name. Is composed of main body of the motor and drive, is a kind of typical mechatronics product. As a motor industry & other; New & throughout; , although the brushless dc motor to enter our country history is not long, and high prices have a brush motor, but because of obvious advantages, brushless motor rapid development momentum. Since our country, the quickly by household appliances, cars, ships and machinery and other industries, and its place in the various industries, the rapid development. Brushless motor why can have a low price is the industry of brushless motor, that why it can short on motor market place? In fact, it has the same effect with the company, as long as it can ensure use effect and the quality can attract loyal customers. For now the price of apple's electronic products is generally high, the market is still hot, obviously, when quality and price but can only choose one, is has the purchasing power of customers is still the top priority for use. What is the excellent function at the top of a brushless motor, brushless motor how much smaller structure, weight is lighter, conforms to the market for light weight, good functional product planning requirements. Second, because of the use of permanent magnets, the rotor without core loss, so the brushless motor is more efficient, together, the use of permanent magnets can also reduce the motor protection, extend the using life of motor. Third, the brushless motor is self-control type operation, will not happen when the load mutation vibration and out-of-step. By using the appropriate change algorithm, can make the thermodynamic function improvement, can achieve better motor speed scale and the echo time, made it possible to better electromagnetic separation, and the torque response is better. To sum up is: small volume, light weight, long service life, high efficiency, low noise, small oscillation, no spark, high reliability, good stability, strong adaptability, repair and maintenance of a brief. With excellent function, brushless dc motor quickly attracted & otherSmall, light, thin & throughout; Audio-visual products, mute appliances and luxury cars, such as the manufacturer's attention. Whereby countries are also accelerates the pace of development of brushless motor products and occupy the market. A Japanese company has been successful to brushless dc motor is applied to digital cameras, mini tape recorder, video camera, printer, mobile storage, mobile phones and car air conditioners, vacuum cleaners, electric cars, the heart pumps, etc. Brushless dc motor has now can fully replace the dc motor speed regulation, frequency converter, asynchronous motor + reducer + frequency conversion motor speed control. In has mobilized all the advantages of traditional dc motor with cancelled the carbon brush and slip ring structure, excellent torque characteristics. Medium and low speed torque function good, large and small current, torque stepless speed regulation, wide speed regulation scale, overload ability. And now practice have motor life is about ten thousand hours, the life span of the brushless dc motor is it several times. In addition to this, because there is no excitation brushless motor itself and the loss of carbon brush, eliminates the loss of multiple reduction, comprehensive energy-saving rate can reach 20% ~ 60%, so the price difference with normal motor just relying on the power saving a year after a can recycle with costs, plus the government has launched energy conservation and environmental protection in recent years, brushless motors can be said to be the trend of the development of the motor. Believe that over time, the price will not become obstacle prevent brushless motor occupy motor market. For the foreseeable future, brushless motor will be fully eliminated brush motor, motor products will enter & other; Brushless s & throughout; 。