Electric/Hybrid Vehicle Motors

The influences of magnetic characteristics of permanent magnet materials, rotor structure, armature winding mode and control strategy on the performance of permanent magnet synchronous drive motor are analyzed.The optimal design method to improve the performance of permanent magnet synchronous drive motor for new energy vehicle is presented ： Ndfeb rare earth permanent magnet material with high remanence , high intrinsic coercivity and high maximum magnetic energy is selected;  a permanent magnetic steel rotor with good steady state performance and high power density is used;  fractional slot concentrated winding with high slot filling rate, low copper material consumption and small tooth slot torque; and the control strategy of direct torque magnetic filed weaking and velocity expansion. The introduction Permanent magnet synchronous drive motor has high power density, high efficiency, small ripple torque and wide speed range, which is the best choice for driving m...

What are the causes of overheating of servo motor bearings? Motor causes: (1) the inner and outer rings of the bearing with too tight. (2) parts of the shape and position tolerance problems, such as shaft, end cover, frame and other parts of the coaxiality. (3) bearings do not fit the motor. (4) bearing lubrication or cleaning is not clean, grease contains sundries. (5) axis current effect. Reasons for use: (1) unit installation problems, such as  coaxiality of   motor shaft and  shaft of driving device does not reach the standard. (2)  pulley is pulled too tight . (3) improper maintenance of bearings, grease or not regular replacement, deterioration or dry

Insulation paint is a special kind of paint Insulating paint, also called insulating coating, is a coating with excellent electrical insulation. It has good electrochemical properties, thermal properties, mechanical properties and chemical properties. Mostly inslulating paint is varnish, also colored paint. Insulating paint is a kind of special paint. Insulating paint is an important insulating material which is based on high polymer and can be cured into insulating film or insulating whole under certain conditions. The insulating paint is composed of base material, flame retardant, curing agent, color filler, solvent and so on. Classification and application of insulating paint 1.Impregnating paint. Impregnating paint is divided into two categories: solvent paint and solvent-free paint, mainly used for impregnating the coils of motors and electrical appliances to fill their gaps and micro-holes, and after curing, it can form a continuous flat film on the surface of the impreg...

Motor vibration reasons and typical cases Vibration of the motor will shorten the insulation and bearing life of the winding, affect the normal lubrication of the sliding bearing, and the vibration force will promote the expansion of the insulation gap, so that the external dust and moisture can intrude, resulting in lower insulation resistance and increased leakage current, or even the formation of insulation breakdown and other accidents. In addition, vibration of the motor easily make the cooling water pipe cracked, the welding points cracked, at the same time can cause loaded machine damaged, reduce the precision of workpiece, can cause all the vibrating mechanical parts fatigue, can make the anchor bolt is loose or broken, motor and can lead to abnormal wear of carbon brush and slip ring, can appear even serious brush fire and burned collector ring, insulation motor will make a big noise, this kind of situation usually also have occurred in the dc motor. There are three m...

1. Imbalance of rotor, coupler, coupling and transmission wheel (brake wheel). 2. Loose core support, loose oblique key and pin failure, and loose rotor binding will cause imbalance of the rotating part. 3. The axis of the linkage part is out of center, the center line does not coincide, and the centering is not correct. The main cause of this kind of failure is the installation process, poor and improper installation. 4. The center line of the linkage part overlaps and is consistent in the cold state, but after running for a period of time, the center line is damaged due to the deformation of the rotor fulcrum and foundation, resulting in vibration. 5. The gear and coupling connected with the motor are out of order, with poor occlusion of the gear, severe wear of the gear teeth, poor lubrication of the opposite wheel, misalignment of the coupling, wrong tooth shape and tooth spacing, excessive clearance or severe wear, all of which will cause certain vibration. 6....