Copper loss rate decreasing type driven motor

Abstract

The invention relates to a driven motor which consists of a core slot wedge (1) composed of a lower end slot wedge (2) of a lower end coil space (3) formed with an empty space and an upper slot wedge (4) of an upper end coil space (5) which is a ladder shape with the lower end slot wedge (2) and forms a larger space than that of the lower end coil space (3), a lower end coil body (20) consistent in shape with the lower end coil space (3), with no dead space and forming a largest area, and an upper end coil body (30) consistent in shape with the upper end coil space (3), with no dead space and forming a largest area. When in a low speed, copper loss of the wire (20, 30) is reduced by 11 %, and saturation magnetic flux density and counter electromotive force are increased in a whole area. Compared with current density motor of the same degree, the driven motor uses increased coils, reduces self weight and using amount of permanent magnets, and especially reduces phenomenon of reduced durability of other components caused by coil heating.

Description

technical field [0001] The invention relates to a driving motor of a hybrid electric vehicle or an electric vehicle, in particular to a driving motor which changes the shape of a coil forming a magnetic force vector, thereby reducing copper loss. Background technique [0002] Generally, a drive motor is used in a hybrid vehicle or an electric vehicle. Improving the efficiency of the drive motor increases the fuel efficiency (distance traveled per liter) of hybrid vehicles and the range (distance traveled per charge) of electric vehicles. [0003] Figure 4 shows the loss rate (Loss Rate) of the drive motor used in general hybrid or electric vehicles. [0004] Figure 4A shows the state when driving in the city (low speed 1,000rpm). As shown in the figure, when the drive motor (80KW) is based on 20 degrees, it can be seen that because the frequency is low, the permanent magnet and rotor , The iron loss of the stator is low, but the copper loss is large on the contrary. [00...

AI Technical Summary

Problems solved by technology

[0022] However, with the above-mentioned structure, the core slot wedge 300 can gradually increase the width (tb), but the coil 400 forms a certain width (ta), as shown in the right diagram of Figure 3B, there must be a saturation magnetic flux density and magnetic Areas of relatively thin momentum (a)

[0023] Therefore, although the copper loss is relatively reduced compared with the toroidal coil, there is still the field (a) where the saturation magnetic flux density and the magnetomotive force are thin as described above, so there is still a certain gap in the development of a high-efficiency drive motor. Shortcomings

Images