brushless dc motor, a new type of high efficiency and energy saving motor. Since 2008, from the energy-saving lamps to energy-saving air conditioning to fuel-efficient cars, the Chinese government fiscal subsidies, and guide the industry technology upgrade, with a more positive attitude and actions for low-carbon development countermeasures. A substantial increase in the crucial task of conventional energy efficiency brushless dc motor product is also on the list. High efficiency and energy saving motor instead of traditional is the trend of The Times, big space in the future. Electric power consumption in China accounted for the proportion of the total power consumption of up to 50%, accounting for nearly 70% of the total industrial electricity consumption. Therefore, to reduce the energy consumption per unit GDP, promising in the field of the motor, and high efficiency and energy saving motor can be used as a breakthrough point of energy saving. Brushless dc motor is to use semiconductor switching device to realize the electronic commutation, electronic switching device instead of traditional contact commutator and brush. It has high reliability, no commutation spark, and low mechanical noise. In the structural design of brushless dc motor, the reasonable design of the stator flux density, avoid saturation, high speed of the motor, decrease the magnetic parts of new type high efficiency and energy saving motor, brushless dc motor has the following advantages and efficient energy-saving breakthrough. New type of brushless dc motor without iron loss and magnetic damping, greatly improve the efficiency. Industrial sawing machine field test shows that the traditional system and the traditional motor (Induction motor with brush)Compared to the brushless dc motor system under working condition can be energy-saving 30%. 0 kw and 2 kw diesel power station, compared with the traditional generator, oil-saving rate was 40%. No brush, low interference. In addition to the brushless dc motor brush, the most immediate change is without the motor running when the electric spark, thus greatly reduce the electric spark interference of remote radio equipment. So the volume is small, the weight is only a fraction of a traditional motor. And can save 80% of the steel, silicon steel sheet, 100% 50% of copper. High reliability. Long life, low maintenance cost less the brush. Brushless dc motor of the wear is mainly on the bearing, from the mechanical point of view, brushless motor is almost a maintenance-free motor, when necessary, the only need to do some cleaning maintenance. Improve the performance of insulation, waterproof, moisture-proof, dustproof, reliable operation, low temperature rise, improve the environment adaptability under extreme conditions, the traditional motor generally working time experiment for 2000 hours, and brushless dc motor is up to 20000 hours. Our government has stressed to use high efficiency motors. To improve efficiency, is to reduce the loss of all. The wastage of the machine are mainly iron loss, copper loss, mechanical loss and stray loss. Brand brushless dc motor is actively developing a motor with higher, accelerate the upgrading of brushless motor, more efficient to achieve high efficiency of the motor.
