Internal structure of relays

The internal structure of the magnetic retention relay is divided into two layers: the upper layer is the electromagnetic system, and the lower layer is the contact system. The electromagnetic system adopts a flat direct acting magnetic circuit system, including a mounting plate. Magnets, magnets, coils, iron cores, and armatures are arranged in the center of the mounting plate. Install coils arranged on both sides of the magnet. There is a shaped iron core above the coil, and there are armature iron between the iron cores, which cooperate with each other to form a circular structure. The two ends of the installation plate are located next to the U-shaped bottom of the iron core, and pure iron plates are also installed to prevent interference from external magnetic fields.
The operating principle of magnetic retention relay
Usually, the open and closed states of the contacts of a magnetic holding relay are maintained by the magnetic force generated by the permanent magnet. When the contacts of the relay need to be opened or closed, only positive and negative DC pulse voltage is needed to excite the coil, and the relay instantly completes the switching state. Usually, when the contact is in the holding state, the coil does not need to be continuously energized, and the state of the relay can be maintained by the magnetic force of the permanent magnet.
The operation process of magnetic retention relay
When the contacts of a relay need to be set, only a positive DC pulse voltage is needed to excite the coil. The magnetic poles generated by the coil excitation interact with the magnetic poles of the permanent magnet, causing the same polarity to repel each other and different polarities to attract each other. As a result, the relay instantly completes the state transition from reset to setting. The process of changing a magnetic holding relay from a set state to a reset state is the same.
From an environmental perspective, the disadvantage of magnetic retention relays is that they consume more materials compared to electromagnetic relays. In the long run, its environmental performance is superior to ordinary electromagnetic relays. There is not much difference in seismic performance between ordinary relays and magnetic retention relays.