Thus, the temperature of the armature winding can be reduced by 10 to 15☌. Due to the use of rectangular copper wire conductors, the thermal conductivity of the armature winding is higher than that of the traditional round copper wire. The smaller resistance means that the loss of power is lower under the same current which is conducive to improving efficiency. The slot filling factor of Hair-pin rectangular copper wire winding motor designed by HASCO E-DRIVE could reach as high as 90%, while that of the traditional round copper wire winding motor is about 75% at present.įig.1 Schematic diagram of rectangular copper wire winding and round copper wire windingĪ higher slot filling factor means that the resistance of stator is smaller than the same size motor. Fig.1 is a schematic diagram of rectangular copper wire winding and a round copper wire winding. It can be seen from the figure that more copper conductors can be arranged in the stator slots due to the use of rectangular copper wire windings, which improves the slot fill factor of the motor. The technology of rectangular copper wire winding is widely regarded as one of the main development directions of traction motor technology in the future.Ĭompared with the traditional round copper wire winding motor, the rectangular copper wire winding motor has better performance in terms of efficiency, power density, cost and noise, which conforms to the technological development direction of the traction motor. In order to meet the above technical requirements, engineers and technicians in various countries tried their best to improve the performance of traction motors. According to the requirements of new energy vehicles for cruising range, acceleration, cost and comfort, the technical requirements for driving motors can be summarized as “two high and two low”, which is interpreted as high efficiency, high power density, low cost and low noise. Therefore, the R&D and manufacture of traction motors has been of growing concern among the world's major vehicle and parts manufacturers. The performance of the motor directly affects the vehicle performance. It can be foreseen that in the near future, new energy vehicles will replace traditional fuel vehicles and become the main means of daily transportation.Īs the core part of the new energy vehicle, the traction motor, which is equivalent to the engine of traditional vehicles, provides power output for the vehicle. Taking China as an example, the sales of new energy vehicles in 20 both exceeded 1.2 million.
In recent years, new energy vehicles have gradually entered into the lives of ordinary consumers due to the rapid development of electric drive technology and the strong support of new energy policies from countries all around the world.
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