The micro DC motor can provide high-speed output to drive the load. The motor is composed of two parts: the stator and the rotor. The rotor iron core is wound with a pure copper coil. The function of the winding is to generate electromagnetic torque and induced electromotive force. The energy conversion plays a key role, so it is also called the armature. Common coil materials are pure copper coils, and some use aluminum coils. The following Tianfu micromotor briefly describes the advantages and distinguishing methods of pure copper coil micro DC motors.
The miniature DC with pure copper coil is heavier than the aluminum core motor at the same level, and the volume will be slightly larger. When you disassemble the DC motor, you can find that the color of the coil is different. Some use copper-clad aluminum to scrape off the cover. The wire core is white, and the resistance of the aluminum core is greater than that of the copper core. Compared with the aluminum core coil, it has the following characteristics.
1. The electrical conductivity of pure copper micro motors is better than that of aluminum wires, so once the aluminum wire micro motors work for a long time, they will heat up, and the overall performance is not as stable as that of pure copper micro DC motors. The power of aluminum wire DC motors is much smaller than that of pure copper motors. , about 20% smaller than the pure copper micro DC motor.
2. The pure copper coil used in the miniature DC motor is less likely to generate heat, and the service life will be longer than that of the aluminum coil.
3. For pure copper coil micromotors, it will save more power. The resistance in the circuit components is proportional to the heat generation. The greater the resistance, the greater the heat.
4. The noise of the copper coil micro motor will be smaller, and the noise of the aluminum coil micro motor is about 2 times higher than that of the copper motor.
5. Compared with copper wire motors, aluminum wire micro motors are lighter in weight and cheaper in price, but have poor mechanical strength, and are prone to oxidation at the ends of the connecting wires. After oxidation, the temperature of the motor will rise and the contact will be poor. , lead to failure, the aluminum wire motor is not easy to weld with low strength and low melting point, resulting in excessive temperature rise and increased loss.
