The key to reduce the loss of highly efficient motor all kinds of technology research, the main way is to reduce the motor loss, this requires the motor on the mechanism of all kinds of loss extremely thorough and meticulous research, to develop the potential of reduce the loss of all kinds of, this is no longer a single electromagnetic design, it is based on the traditional motor design model to establish a more power electric motors accurate mathematical physical model, and considering the process, material, machining accuracy, the structure, the ratio of various factors such as study, put forward to solve the key technology to reduce the loss of all kinds of motor and the design technology, including the structure design and manufacturing technology of super efficient motor, the rotor parameters, to reduce the power consumption of copper winding technology, reduce the power consumption of the wind the wind road components, ventilation system and the design of the bearing system, motor manufacturing technology research in order to reduce additional loss, etc. In conclusion, to develop highly efficient motor can be developed the key technology needed to do the job are briefly summarized as the following aspects: 1) in the motor loss calculation and analysis research: traditional calculation method based on the analysis of the magnetic circuit loss and play a major role in China's past series motors are designed, such as Y, Y2, Y3 series induction motor, but this method exists empirical coefficient is various, such as local distribution cannot be analyzed loss limitations.
In order to solve this problem, the researchers conducted at home and abroad based on modern computer technology for the analysis of loss of the new study, this respect is the most widely used finite element method,www.facebook.com/dongfeng.motor this method can easily handle arbitrary structure and arbitrary boundary conditions and complex problems brought by the source distribution, at the same time can also plan and saturation within the motor and nonlinear complex problems, such as in motor design has a unique advantage. Against the super-efficient motor loss for this reason, the finite element simulation analysis and research, to reveal the motor internal loss characteristics from the microscopic view has important theoretical value, but also can be in order to further study how to improve the motor structure design to provide necessary technical reference. 2) on the motor loss factors and structure improvement research: because of the influence of the motor loss factor is various, involving motor iron core structure, winding structure and manufacturing process, and so on. Most the influence factors of the core structure, which mainly includes the stator slot,acmotortrading.blogspot.com and the air gap size, chute and groove Angle, the size of the trough, trough type (closed slot or semi-closed slots) and stator side structure, etc. For decades, limited to the limitation of calculating method, in the design of asynchronous motor, the influence of core structure use no more saturated theoretical value or experience value, the processing method can't for a specific factors on the specific impact of the loss of an in-depth study. Therefore, in the super efficient early motor development, the need for different motor structure finite element model is set up, by changing the parameters of different motor structure and material properties, analyzed the influence extent of different factors on the motor loss of concrete based on the optimal design scheme, and finally to achieve. 3) in the motor loss test research: in the latest IEC motor test standard IEC60034-2-1 the rotary motor (except for traction motor) to determine the efficiency and loss test method, the regulation IEEEl12B method as the only test method of low uncertainty. So, if you want to develop real conform to the high level of efficiency of motor, must be in low uncertainty of IEEE 1 I 2 b method system research, the focus is to study the precise measurement of the input power under the condition of low power factor, low uncertainty of additional loss and efficiency testing technology as well as the uncertainty evaluation techniques. 4) to reduce the loss of other measures, the development of highly efficient motor, also involves motor core materials, winding type and manufacturing process and how to reduce the mechanical consumption research, by conducting such studies can be from a certain 8500w gasoline generator extent, reach the purpose of consumption.
3,in the Y-delta start wholesalemotor.blogspot.com main circuit,as long as you don't change the position of the three power cord connection such as L1,L2,L3 and U1,V1,respectively connected W1 phase sequence is changeless,then Y-delta start,switching process will not reverse!The season reference aromatic content of the reply:The results of the two methods is to remain unchanged. Will do. From the analysis I see two kinds of connection,the current in the coil is the first start with the runtime of the same. The second is the opposite,but the direction of rotation of the magnetic field is the same. Instantaneous polarity is opposite.Don't know will make 8500w gasoline generator much difference.
