Principle and structure of micro conductive slip rings
Micro conductive slip rings, also known as compact versions of micro slip rings or cap-type slip rings, are electrical rotary connection solutions designed specifically for miniaturized, high-precision, high-speed rotating equipment. They are more sophisticated in structure, small in size and light in weight, and are suitable for occasions where continuous rotation and simultaneous transmission of power and/or signals are required in a limited space. Its principle and structural features are as follows:
The basic working principle of micro conductive slip rings is similar to that of traditional conductive slip rings, both of which transmit power or signals between rotating and stationary bodies through sliding contact. The core of the micro slip ring is that its rotor part (usually carrying a conductive ring) rotates with the equipment, while the brush of the stator part remains stationary, and the two transmit current or signals through precise sliding contact.
The structure of the micro conductive slip ring is mainly composed of the following parts:
- Conductive ring: Made of copper, gold, silver or other highly conductive and wear-resistant alloys, embedded or directly molded in the rotor component, responsible for transmitting current or signals.
- Brush assembly: Usually a composite material containing precious metals or solid lubricants is used to ensure low-resistance contact and reduce wear.
- Insulation material: Use high-performance insulation materials between the conductive rings and between the conductive rings and the housing to ensure electrical isolation between the circuits.
- Housing: May be made of metal or high-strength engineering plastics to provide mechanical protection and meet space constraints.
Design features of micro conductive slip rings include:
- Precision alignment: Due to its small size, the alignment and contact between the brush and the conductive ring are extremely high to ensure stable transmission and reduce wear under high-speed rotation.
- Low friction design: Use brush materials with low friction coefficients and conductive rings with special coatings to reduce wear and extend service life.
- Highly integrated: Micro slip rings are often designed as highly integrated units, which may include signal conditioning circuits, EMI suppression measures, etc. to meet the needs of specific applications.
Applications
Due to its small size and stable transmission performance, micro conductive slip rings are widely used in occasions requiring high-precision rotation and data transmission, such as medical instruments, precision test equipment, micro drones, security cameras, robot joints, fiber optic gyroscopes, etc.
In summary, micro conductive slip rings pursue extreme miniaturization and high performance in design and manufacturing, and are one of the indispensable components in modern high-tech equipment.
