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What are the common materials for motors?
Release time：
2024-08-20
Author:
作者
Source:
设计云
Common materials for motors include conductor materials, insulating materials, films, adhesive tape composite materials, and organic materials.
1. Conductor materials:
Copper, aluminum, copper-aluminum alloy, silver, etc. Since silver is relatively expensive, it is not used in large projects.
2. Insulating materials:
Glass fiber, polyvinyl chloride, non-vulcanized rubber or plastic mixture, etc.
3. Film, adhesive tape composite materials:
Thermosetting plastics, thermoplastic plastics, adhesives.
4. Organic materials:
Acetal, polyester, polyamine, polyester imide resin, etc. and inorganic materials such as glass.
Working principle of motor:
The direction of the force on the conductor is determined by the left-hand rule. This pair of electromagnetic forces forms a torque acting on the armature. This torque is called electromagnetic torque in the rotating motor. The direction of the torque is counterclockwise, attempting to make the armature rotate counterclockwise.
If this electromagnetic torque can overcome the resistance torque on the armature (such as the resistance torque caused by friction and other load torques), the armature can rotate counterclockwise.
DC motors are motors that rely on DC working voltage to operate. They are widely used in tape recorders, video recorders, DVD players, electric shavers, hair dryers, electronic watches, toys, etc.
The stator magnetic field (main magnetic field) of the electromagnetic DC motor is composed of an iron core and an excitation winding. According to the different excitation methods (called excitation in the old standard), it can be divided into series-excited DC motors, shunt-excited DC motors, separately-excited DC motors, and compound-excited DC motors. Due to different excitation methods, the laws of the stator magnetic flux (generated by the stator magnetic excitation coil after power is supplied) are also different.
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