As countries promote efficient brushless dc motor work thorough development, many companies have replaced the high energy consumption of ordinary brushless dc motor as energy efficient brushless dc motor, to better play to the high efficiency and energy saving performance brushless dc motor, brushless dc motor is necessary for routine maintenance, in this paper, the brushless dc motor will take you to understand in the south of anhui high efficiency and energy saving of brushless dc motor bearing replacement cycle and need to pay attention to the problem of replacement. How to determine the efficiency of brushless dc motor bearing replacement time? Strictly speaking, determine the replacement of high efficiency and energy saving time of brushless dc motor bearing is a complex problem, it is difficult to use a simple data to answer. Because it involves the original with the quality of the bearing, the quality of the grease and running time of every day how many, many factors such as the size of the load and smooth degree. So, are generally according to the monitoring of brushless dc motor bearings used in actual situation to determine whether or not to be replaced. Found significantly higher, bearing temperature, for example, appear obvious abnormal phenomenon such as noise and large vibration, you should consider apart brushless dc motor, check the bearing whether damaged or badly worn. Badly discolored or grease can see with metal powder, bearing has serious wear and tear, general will clean grease to the specific situation of the damage was observed. Then according to the check to decide whether to change the condition of the bearing. If a replacement cycle (must be specifiedBecause in some occasions, wait until the replacement cannot decide when to replace, can seriously affect production, even cause bigger loss, so to use equipment regular maintenance and replacement parts including mandatory provisions), suggest to use more frequent (Such as use every day in more than 7 h)Volatile (or loadEspecially in every cycle fluctuations have load impact load stage)Bearing, rules change cycle for 1 year or so; Shorter operation time and load is lighter for the provisions of the replacement cycle between a year and a half to two years. Replace the high efficiency and energy saving brushless dc motor bearing problems which should be paid attention to when? Replacing the original bearing efficient brushless dc motor, remove the original use bearing, to avoid the damage of rotor shaft and bearing retainer, want to choose the varieties, and the original use of the same assembly new bearing to use appropriate assembly process.