Flat Copper Wire Drive Machine
The drive motor mainly consists of stator assembly, rotor assembly, end cover and auxiliary standard parts, while the stator winding includes iron core, copper wire winding, insulation materials and other components.
Flat copper wire motor is that flat copper wire is used in the stator winding, and the winding is first made into a shape similar to a hairpin, threaded into the stator slot, and then the end of the hairpin is welded at the other end.
Flat copper wire drive motor is a new type of motor technology, which adopts flat copper wire winding instead of the traditional round copper wire winding, which can improve the power density and efficiency of the motor. Flat copper wire drive motor has the following characteristics:
1: The same power, smaller volume, less material, lower cost, or the same volume, slot fullness increase, power density increase. Round wire into flat wire, theoretically, under the premise of the space remains unchanged, flat wire motors can achieve 70% slot fullness, filled with copper can be increased by 20-30%, generating a stronger magnetic field strength, which is equivalent to an increase in power by 20-30% to some extent.
2: Better temperature performance. The internal gap becomes less, the contact area between flat wire and flat wire is large, better heat dissipation and heat conduction; the contact between winding and core slot is better, better heat conduction; and the motor is very sensitive to heat dissipation and temperature, better heat dissipation, the performance will be improved. Some people through the temperature field simulation, concluded that the same design of flat copper wire motor winding temperature rise is 10% lower than round copper wire motor.
3: Lower electromagnetic noise. Flat wire motor wire stress is relatively large, the rigidity is relatively large, the armature has a better stiffness, the armature noise has a suppression effect; can take a relatively small slot size, effectively reduce the cogging torque, and further reduce the electromagnetic noise of the motor.
4: Short end, save copper, improve efficiency. Traditional round wire motors, due to process problems, its end is generally left longer, otherwise it is easy to damage the copper wire in the process. For flat wire motors, because the wires are hard wires, you can make the end smaller in the process, compared with round wire motors to reduce the end size by 20%, the space is further reduced, you can further reduce the size of the system, to achieve miniaturization and lightweight.
5: The highest efficiency point of the flat wire motor is not necessarily much higher than the round wire, but the high efficiency zone can be further broadened.
Flat copper wire drive motors are now widely used in automotive, aerospace, industrial automation, robotics and other fields. In the future, with the rapid development of the electric vehicle market, flat copper wire drive motors will continue to be widely used and promoted.
